Sugahara, H. et al., 2024. Nitrogen K-edge X-ray adsorption near-edge structure spectroscopy of chemically adsorbed ammonia gas on clay minerals and the 15N/14N-nitrogen isotopic fractionation, Analytical Sciences. [Link]

Fukai, R. et al., (incl. Usui, T., Sugahara, H.) 2024. Curation protocol of Phobos sample returned by Martian Moons eXploration, Meteoritics & Planetary Science. [Link]


Hirata, K. et al., (incl. Usui, T., Hyodo. R., Fukai, R.) 2023. Mixing model of Phobos’ bulk elemental composition for the determination of its origin: Multivariate analysis of MMX/MEGANE data, Icarus. [Link]

Suzuki, Y. et al., 2023. The relation between the surface composition anomaly and distribution of the exosphere of Mercury, Earth and Planetary Science, 75, 174. [Link]

Kajitani, I. et al., (incl. Usui, T.) 2023. Identification of carbonate-associated sulfate (CAS) in a Noachian Martian meteorite Allan Hills 84001, Earth and Planetary Science Letters, 620, 15. [Link]

McCain, K.A. et al., (incl. Usui, T.) 2023. Early fluid activity on Ryugu inferred by isotopic analyses of carbonates and magnetite, Nature Astronomy, p 1-9. [Link]

Broadley, M.W. et al., (incl. Usui, T.) 2023. The noble gas and nitrogen relationship between Ryugu and carbonaceous chondrites, Geochimica et Cosmochimica Acta, v. 345, p. 62–74. [Link]


Tack, P. et al., (incl. Usui, T.) 2022. Rare earth element identification and quantification in millimetre-sized Ryugu rock fragments from the Hayabusa2 space mission, Earth, Planets and Space, v. 74, p. 146. [Link]

Sato, M. et al., (incl. Usui, T.) 2022. Rock Magnetic Characterization of Returned Samples From Asteroid (162173) Ryugu: Implications for Paleomagnetic Interpretation and Paleointensity Estimation, Journal of Geophysical Research: Planets, v. 127, p. e2022JE007405. [Link]

Sasaki, S. et al., (incl. Usui, T.) 2022. In situ biochemical characterization of Venus cloud particles using a life-signature detection microscope, Canadian Journal of Microbiology, v. 68, p. 413–425. [Link]

Paquet, M., (incl. Usui, T.) 2022. Contribution of Ryugu-like material to Earth’s volatile inventory by Cu and Zn isotopic analysis, Nature Astronomy, p. 1–8. [Link]

Okazaki, R. et al., (incl. Usui, T.) 2022. First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu, Science Advances, v. 8, p. eabo7239. [Link]

Noguchi, T. et al., (incl. Usui, T.) 2022. A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu, Nature Astronomy, p. 1–12. [Link]

Nakamura, E. et al., (incl. Usui, T.) 2022. On the origin and evolution of the asteroid Ryugu, A comprehensive geochemical perspective: Proceedings of the Japan Academy, Series B, v. 98, p. PJA9806B-01. [Link]

Nakamura, T. et al., (incl. Usui, T.) 2022. Formation and evolution of carbonaceous asteroid Ryugu, Direct evidence from returned samples: Science, p. eabn8671. [Link]

Moynier, F. et al., (incl. Usui, T.) 2022. The Solar System calcium isotopic composition inferred from Ryugu samples, Geochemical Perspectives Letters, v. 24, p. 1–6. [Link]

Liu, M.-C. et al., (incl. Usui, T.) 2022. Incorporation of 16O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu, Nature Astronomy, v. 6, p. 1172–1177. [Link]

Kawasaki, N. et al., (incl. Usui, T.) 2022. Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2, Science Advances, v. 8, p. eade2067. [Link]

Ito, M. et al., (incl. Usui, T.) 2022. A pristine record of outer Solar System materials from asteroid Ryugu’s returned sample, Nature Astronomy, v. 6, p. 1163–1171. [Link]

Hopp, T. et al., (incl. Usui, T.) 2022. Ryugu’s nucleosynthetic heritage from the outskirts of the Solar System, Science Advances, v. 8, p. eadd8141. [Link]

Greenwood, R.C. et al., (incl. Usui, T.) 2022. Oxygen isotope evidence from Ryugu samples for early water delivery to Earth by CI chondrites, Nature Astronomy, v. 7, p. 29–38. [Link]

Cho, Y. et al., (incl. Usui, T.) 2022. Development of a multispectral stereo-camera system comparable to Hayabusa2 optical navigation camera (ONC-T) for observing samples returned from asteroid (162173) Ryugu, Planetary and Space Science, v. 221, p. 105549. [Link]

Bazi, B. et al., (incl. Usui, T.) 2022. Trace-element analysis of mineral grains in Ryugu rock fragment sections by synchrotron-based confocal X-ray fluorescence, Earth, Planets and Space, v. 74, p. 161. [Link]

Barosch, J. et al., (incl. Usui, T.) 2022. Presolar Stardust in Asteroid Ryugu, The Astrophysical Journal Letters, v. 935, p. L3. [Link]

Masunaga, K, N. Terada, N. Yoshida, Y. Nakamura, T. Kuroda, K. Yoshioka, Y. Suzuki, H. Nakagawa, T. Kimura, F. Tsuchiya, G. Murakami, A. Yamazaki, T. Usui, and I. Yoshikawa, 2022. Alternate oscillations of Martian hydrogen and oxygen upper atmospheres during a major dust storm, Nature Communications, 13, 6609. [Link]

Ruj T., Komatsu, G., Schmidt, G., Karunatillake, S., and Kawai, K., 2022. Tectonism of Late Noachian Mars: Surface Signatures from the Southern Highlands. Remote Sensing, 14(22). [Link]

R. Hyodo, H. Genda, R. Sekiguchi, G. Madeira, S. Charnoz (2022). “Challenges in forming Phobos and Deimos directly from a splitting of an ancestral single moon”. Planet. Sci. J. 3, 204. [Link]

Bott, N., Perna, D., Deshapriya, J. D. P., Hasselmann, P. H., Barucci, M. A., Domingue, D. L., ... & Fulchignoni, M. (incl. Matsuoka, M. & Usui, T.)(2022). Clustering analysis of high spatial resolution spectra of asteroid (162173) Ryugu from Hayabusa2/NIRS3. Planetary and Space Science, 105530.[Link]

Yokoyama, T., Nagashima, K., Nakai, I., Young, E. D., Abe, Y., Aléon, J., ... & Yurimoto, H. (incl. Usui, T. & Fukai, R.)(2022). Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites. Science, eabn7850. [Link][Press Release]

Nakamura, E., Kobayashi, K., Tanaka, R., Kunihiro, T., Kitagawa, H., Potiszil, C., ... & Tsuda, Y. (incl. Usui, T. & Fukai, R.)(2022). On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective. Proceedings of the Japan Academy, Series B, 98(6), 227-282.[Link][Press Release]

Meyer, M. A., Kminek, G., Beaty, D. W., Carrier, B. L., Haltigin, T., Hays, L. E., ... & Zorzano, M. P. (incl. Usui, T.) (2022). Final Report of the Mars Sample Return Science Planning Group 2 (MSPG2). Astrobiology. [Link]

Carrier, B. L., Beaty, D. W., Hutzler, A., Smith, A. L., Kminek, G., Meyer, M. A., ... & Zorzano, M. P. (incl. Usui, T.) (2022). Science and curation considerations for the design of a Mars Sample Return (MSR) Sample Receiving Facility (SRF). Astrobiology. [Link]

Tosca, N. J., Agee, C. B., Cockell, C. S., Glavin, D. P., Hutzler, A., Marty, B., ... & Zorzano, M. P. (incl. Usui, T.) (2022). Time-sensitive aspects of Mars Sample Return (MSR) science. Astrobiology. [Link]

Grady, M. M., Summons, R. E., Swindle, T. D., Westall, F., Kminek, G., Meyer, M. A., ... & Zorzano, M. P. (incl. Usui, T.) (2022). The Scientific Importance of Returning Airfall Dust as a Part of Mars Sample Return (MSR). Astrobiology. [Link]

Velbel, M. A., Cockell, C. S., Glavin, D. P., Marty, B., Regberg, A. B., Smith, A. L., ... & Zorzano, M. P. (incl. Usui, T.) (2022). Planning implications related to sterilization-sensitive science investigations associated with Mars Sample Return (MSR). Astrobiology. [Link]

Haltigin, T., Hauber, E., Kminek, G., Meyer, M. A., Agee, C. B., Busemann, H., ... & Westall, F. (incl. Usui, T.) (2022). Rationale and proposed design for a Mars Sample Return (MSR) science program. Astrobiology. [Link]

Tait, K. T., McCubbin, F. M., Smith, C. L., Agee, C. B., Busemann, H., Cavalazzi, B., ... & Zorzano, M. P. (incl. Usui, T.) (2022). Preliminary planning for Mars Sample Return (MSR) curation activities in a Sample Receiving Facility (SRF). Astrobiology. [Link]

Asaah, A. N. E., Yokoyama, T., Iwamori, H., Aka, F. T., Tamen, J., Kuritani, T., ... & Fozing, E. M. (incl. Usui, T.) (2022). Geochemical composition of dykes along the Cameroon Line (CL): Petrogenesis and similarities with the Central Atlantic Magmatic Province. Geochemistry, 125865. [Link]

Pilorget, C. et al. (incl. Usui, T.) (2021) First compositional analysis of Ryugu samples by the MicrOmega hyperspectral microscope. Nature Astronomy. doi. 10.1038/s41550-021-01549-z. [Link] [ISAS/JAXA press release (EN)] [ISAS/JAXA press release (JP)]

Yada, T. et al. (incl. Usui, T., Noguchi, R., Shimaki, Y., Matsuoka, M., Sakatani, N.) (2021) Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu. Nature Astronomy. doi: 10.1038/s41550-021-01550-6. [Link] [ISAS/JAXA press release (EN)] [ISAS/JAXA press release (JP)]

Tachibana, S., Sawada, H., Okazaki, R., Takano, Y., Sakamoto, K., Miura, Y. N., ... & Tsuda, Y. (incl. Usui, T.) (2022). Pebbles and sand on asteroid (162173) Ryugu: in situ observation and particles returned to Earth. Science, 375(6584), 1011-1016. [Link]

Usui, T., Righter, K., Shearer, C. K., & Jones, J. H. (2022). Effect of sulfur on siderophile element partitioning between olivine and a primary melt from the martian mantle. American Mineralogist: Journal of Earth and Planetary Materials, 107(3), 357-368. [Link]

Oura, A., Yasumasa, K., Noguchi, R., Kumamoto, A., Ishiyama, K., Usui, T., ... & Kimura, T. (2022). Search for shallow subsurface structures in Chryse and Acidalia Planitiae on Mars. Icarus, 380, 114991. [Link]

R. Hyodo, S. Ida, and T. Guillot (2022). A “no-drift” runaway pile-up of pebbles in protoplanetary disks II. Characteristics of the resulting planetesimal belt. A&A, 660, A117. [Link]

N. Ozaki, T. K. Yanagida, Chikazawa, N. Takeishi. & R. Hyodo (2022). “Asteroid Flyby Cycler Trajectory Design Using Deep Neural Networks”. JGCD, 0 0:0, 1-16. [Link]

Hirata K., Morota T., Sugita S., Ernst C. M., and Usui T. (2022) "Magma eruption ages and fluxes in the Rembrandt and Caloris interior plains on Mercury: Implications for the north-south smooth plains asymmetry". Icarus, 382, 115034. [Link]

S. Arakawa, R. Fukai, and K.A. Homma. (2022) "Planet formation history revealed by the isotopic heterogeneity in the solar nebula" Planetary People - The Japanese Society for Planetary Sciences, 31 (1), 50. [Link]

Ruj, T., Komatsu G., Kawai K., Okuda H., Xiao Z., and Dhingra D. (2022) "Recent boulder falls within the Finsen crater on the lunar far side: An assessment of the possible triggering rationale". Icarus, 114904. [Link]

Ogohara, K. et al. (incl. Usui, T.) (2022) The Mars system revealed by the Martian Moons eXploration mission. Earth, Planets and Space. 74, doi: 10.1186/s40623-021-01417-0. [Link]

Kuramoto, K. et al. (incl. Usui, T.) (2022) Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets. Earth, Planets and Space. 74, doi: 10.1186/s40623-021-01545-7. [Link]

Takir, D., Matsuoka, M., Waiters, A., Kaluna, H. Usui, T. (2022) "Observations of Phobos and Deimos with SpeX at NASA infrared telescope facility", Icarus, 371, 114691. doi: 10.1016/j.icarus.2021.114691. [Link]


Cho, Y. et al. (incl. Usui, T.) (2021) In-situ science on Phobos with the Raman spectrometer for MMX (RAX): preliminary design and feasibility of Raman measurements. Earth, Planets and Space. 73, 232. doi: 10.1186/s40623-021-01496-z. [Link]

Miyamoto, H. et al. (incl. Aoki, S., Koike, M., Usui, T.) (2021) Surface Environment of Phobos and Phobos Simulant UTPS. Earth, Planets and Space. 73, 214. doi: 10.1186/s40623-021-01406-3. [Link]

M. Kanamaru et al. (incl. Y. Shimaki, N. Sakatani, T. Usui) (2021) "YORP Effect on Asteroid 162173 Ryugu: Implications for the Dynamical History", Journal of Geophysical Reserach: Planets, e2021JE006863. [Link]

Choblet et al. (incl. Usui, T.) (2021) "Enceladus as a potential oasis for life: Science goals and investigations for future explorations". Experimental Astronomy, doi: 10.1007/s10686-021-09808-7. [Link]

G. Liuzzi et al. (incl. S. Aoki) (2021) "First Detection and Thermal Characterization of Terminator CO2 Ice Clouds with ExoMars/NOMAD", Geophysical Research Letters. [Link]

M.R. Patel et al. (incl. S. Aoki) (2021) "ExoMars TGO/NOMAD‐UVIS vertical profiles of ozone: Part 1 – Seasonal variation and comparison to water", Journal of Geophysical Research: Planets. [Link]

M. M. J. Crismani et al. (incl. S. Aoki) (2021) "A Global and Seasonal Perspective of Martian Water Vapor from ExoMars/NOMAD", Journal of Geophysical Research: Planets. [Link]

Asaah, A.N.E et al. (incl. Usui, T.) (2021) "High–µ Signature in Lavas of Mt. Oku: Implications for Lithospheric and Asthenospheric Contributions in the Magmatism of the Cameroon Volcanic Line (West Africa)", Lithos. 400-4001, 106416. [Link]

Suga, H., Suzuki, K., Usui, T., Yamaguchi, A., Sekizawa, O., Nitta, K., Takeichi, Y., Ohigashi, T., Takahashi, Y. (2021) "A New Constraint on the Physicochemical Condition of Mars Surface during the Amazonian Epoch Based on Chemical Speciation for Secondary Minerals in Martian Nakhlites", Minerals. 11, 514 [Link]

Shidare, M., Nakada, R., Usui, T., Tobita, M. Shimizu, K. Takahashi Y., Yokoyama, T. (2021) "Survey of Impact Glasses in Shergottites Searching for Martian Sulfate Using X-ray Absorption Near-Edge Structure", Geochimica et Cosmochimica Acta. 313, 85-98. [Link]

De, K., Ruj, T., Kundu, A., Dasgupta, N., and Kawai, K. (2021). "Evolution of Pyrrhae Fossae, Mars: an explication from the age estimation using the Buffered Crater Counting technique", Current Science. [Link] [Cover page]

H. Kurokawa, T. Kuroda, S. Aoki, H. Nakagawa (2021). "Can we constrain the origin of Mars' recurring slope lineae using atmospheric observations?", Icarus, 114688-114688. [Link]

E. D'Aversa, F. Oliva, F. Altieri, G. Sindoni, F. G. Carrozzo, G. Bellucci, F. Forget, A. Geminale, A. Mahieux, S. Aoki, M. Amoroso (2021). "Vertical distribution of dust in the Martian atmosphere: OMEGA/MEx limb observations", Icarus, 371, 114702-114702. [Link]

Chaffin, M.S., Kass, D.M., Aoki, S. et al. "Martian water loss to space enhanced by regional dust storms", Nature Astronomy (2021). [Link] [ISAS GATE]

R. Hyodo & T. Usui (2021). "Searching for life on Mars and its moons", Science 373, 742. [Link]

S. Charnoz, G. Avice, R. Hyodo, F. C. Pignatale and M. Chaussidon (2021). "Forming pressure traps at the snow line to isolate isotopic reservoirs in the absence of a planet", A&A 652, A35. [Link]

J.A. Holmes, S.R. Lewis, M.R. Patel, M.S. Chaffin, E.M. Cangi, J. Deighan, N.M. Schneider, S. Aoki, A.A. Fedorova, D.M. Kass, A.C. Vandaele, "Enhanced water loss from the martian atmosphere during a regional-scale dust storm and implications for long-term water loss", Earth and Planetary Science Letters, Volume 571, 2021, 117109. [Link]

Cho, Y., et al. (incl. Kanamaru, M. & Matsuoka, M.) (2021). "Geologic history and crater morphology of asteroid (162173) Ryugu". Journal of Geophysical Research: Planets, 126, e2020JE006572. [Link]

Ruj, T. and Kawai, K. (2021) "A global investigation of wrinkle ridge formation events; Implications towards the thermal evolution of Mars". Icarus. [Link]

Yoshitake, M., Nakato, A., Kumagai, K., Nishimura, M., Yada, T., Tachibana, S., Okada, T., Abe, M., Yurimoto, H., Usui, T. and Astromaterial Science Research Group (2021). "Cleanliness level of the Extraterrestrial Sample Curation Center of JAXA". JAXA Research and Development Report, JAXA-RR-20-004E, 1-30. [Link]

菅原 春菜2021)「宇宙における安定窒素同位体比の多様性とその起源解明に向けた実験的アプローチ」(Sugahara H. (2021) "Diversity of stable nitrogen isotopic ratio in the universe and the experimental approaches to understand the origins"), 低温科学, vol. 79, pp.51-58. [Link]

Sugimoto C. et al. (incl. Matsuoka M.) (2021). "High-resolution observations of bright boulders on asteroid Ryugu: 2. Spectral properties". Icarus, 114591. [Link]

Matsu'ura F., Nakada R., Usui T., Sawaki Y., Ueno Y, Kajitani I., Saitoh M. (2021). "Spatial distribution and speciation of sulfur in Ediacaran limestones with μ-XRF imaging and XANES spectroscopy: Implications for diagenetic mobilization of sulfur species". Geochimica et Cosmochimica Acta, 306, 1, 20-43. [Link]

Miyamoto, A., Nakagawa, H., Kuroda, T., Takami, K., Murata, I., Medvedev, A. S., Yoshida, N., Aoki, S., Sagawa. H., Kasaba. Y., Terada. N., (2021). "Intense zonal wind in the Martian mesosphere during the 2018 planet-encircling dust event observed by ground-based infrared heterodyne spectroscopy". Geophysical Research Letters, 48, e2021GL092413. [Link]

Fujiya, W., Furukawa, Y., Sugahara, H., Koike, M., Bajo, K., Chabot, N. L., Miura, Y. N., Moynier, F., Russell, S. S., Tachibana, S., Takano, Y., Usui, T., Zolensky, M. E. (2021). "Analytical protocols for Phobos regolith samples returned by the Martian Moons eXploration (MMX) mission". Earth, Planets and Space. 73, 120. [Link]

Aoki, S., Daerden, F., Viscardy, S., Thomas, I. R., Erwin, J. T., Robert, S., et al. (2021). "Annual appearance of hydrogen chloride on Mars and a striking similarity with the water vapor vertical distribution observed by TGO/NOMAD". Geophysical Research Letters, 48, e2021GL092506. [Link]

Hyodo R. & Genda, H. (2021). "Erosion and accretion by cratering impacts on rocky and icy bodies". ApJ, 913, 77. [Link]

Suga, H., Suzuki, K., Usui,T., Yamaguchi, A., Sekizawa, O., Nitta, K., Takeichi, Y., Ohigashi, T., Takahashi, Y. (2021) "A New Constraint on the Physicochemical Condition of Mars Surface during the Amazonian Epoch Based on Chemical Speciation for Secondary Minerals in Martian Nakhlites", Minerals 2021, 11(5), 514.[Link]

Praet,A., Barucci, M. A., Hasselmann, P. H., Kitazato, K., Iwata,T., Matsuoka, M., Domingue, D., Clark, B.E. (2021)“Hydrogen abundance estimation model and application to (162173) Ryugu”, A&A [Accepted]

Sakatani N. et al. (incl. Matsuoka, M.) (2021),“Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body", Nature astronomy [Accepted]

Sugimoto C. et al. (incl. Matsuoka. M.) (2021) “High-Resolution Observations of Bright Boulders on Asteroid Ryugu: 1. Size Distribution and Morphology”, Icarus [Accepted] DOI:10.1016/j.icarus.2021.114529

Honda R. et al. (incl. Matsuoka, M (2021)“Resurfacing processes on asteroid (162173) Ryugu caused by an artificial impact of Hayabusa2’s Small Carry-on Impactor”, Icarus [Accepted]

Ito, M., Takano, Y., Kebukawa, Y., Ohigashi, T., Matsuoka, M., Kiryu, K., Uesugi, M., Nakamura, T., Yuzawa, H., Yamada, K., Naraoka, H., Yada, T., Abe, M., Hayakawa,M., Saiki, T., Tachibana,S., and Hayabusa2 Project Team.(2021) “Assessing the debris generated by the small carry-on impactor operated from the Hayabusa2 mission”, Geochemical Journal [Accepted]

K. Sugiura, H. Kobayashi, S. Watanabe, H. Genda, R. Hyodo, S. Inutsuka (2021). "SPH simulations for shape deformation of rubble-pile asteroids through spinup: The challenge for making top-shaped asteroids Ryugu and Bennu", Icarus, 365, 114505. [Link]

G. Liuzzi et al. (incl. S. Aoki) (2021), "Probing the Atmospheric Cl Isotopic Ratio on Mars: Implications for Planetary Evolution and Atmospheric Chemistry", Geophysical Research Letters, 2021. [Link]

J.‐C. Gérard, S. Aoki, L. Gkouvelis, L. Soret, Y. Willame, I.R. Thomas, C. Depiesse, B. Ristic, A.C. Vandaele, B. Hubert, F. Daerden, M.R. Patel, J.‐J. López‐Moreno, G. Bellucci, J.P. Mason, M.A. López‐Valverde, "First observation of the oxygen 630 nm emission in the Martian dayglow", Geophysical Research Letters, 2021. [Link]

Charnoz S., Sossi A.P., Lee YN., Siebert J., Hyodo R., Allibert L., Pignatale FC., Landeau M., Oza A.V. & Moynier F. (2021). "Tidal pull of the Earth strips the proto-Moon of its volatiles". Icarus, 364, 114451. [Link]

Nakada, R., Tanabe, G., Kajitani, I., Usui, T., Shidare, M., Yokoyama, T. (2021). "EXAFS Determination of Clay Minerals in Martian Meteorite Allan Hills 84001 and Its Implication for the Noachian Aqueous Environment". Minerals, 11, 176. [Link]

Fukai, R. and Arakawa, S. (2021). “Assessment of Cr isotopic heterogeneities of volatile-rich asteroids based on multiple planet formation models”. The Astrophysical Journal, 908 (64) [Link]

Kameda, S., et al. (incl. Matsuoka, M.) (2021). Improved method of hydrous mineral detection by latitudinal distribution of 0.7-μm surface reflectance absorption on the asteroid Ryugu. Icarus, 114348. [Link]

Kouyama, T. et al. (incl. Matsuoka, M.) (2021). “Post-arrival calibration of Hayabusa2's optical navigation cameras (ONCs): Severe effects from touchdown events". Icarus, 114353, [Link]

Ida, S., Guillot, T., Hyodo, R., Okuzumi, S. & Youdin, N. A. (2021) “Planetesimal formation around the snow line. I. Monte Carlo simulations of silicate dust pile-up in a turbulent disk”. [Link]

Hyodo, R., Guillot, T., Ida, S., Okuzumi, S. & Youdin, N. A. (2021) “Planetesimal formation around the snow line. II. Dust or pebbles?”. [Link]

Hyodo, R., Ida, S., Guillot, T. (2021) “A “no-drift” runaway pile-up of pebbles in protoplanetary disks in which midplane turbulence increases with radius”. A&A 645, L9. [Link][Highlights]

Matsuoka M., "In-Situ Planetary Spectroscopy", 2021. In: Alderton, David; Elias, Scott A. (eds.) Encyclopedia of Geology, 2nd edition, vol.[1], pp. 194-206. United Kingdom: Academic Press. [Link]

Kitazato K. et al. (incl. Matsuoka, M. and Noguchi, R.) (2021) "Thermally altered subsurface material of asteroid (162173) Ryugu". Nature Astronomy, 2021, DOI: 10.1038/s41550-020-01271-2 [Link]

Hyodo, R., Genda, H. & Brasser, R. “Modification of the composition and density of Mercury from late accretion” (2021), Icarus, 354, 114064. [Link][ELSI’s Research Highlights, EN][ELSI’s Research Highlights, Jp]


Kurokawa, H. et al. (incl. Usui, T.) (2020). “A probabilistic approach to determination of Ceres' average surface composition from Dawn VIR and GRaND data“. Journal of Geophysical Research–Planets, 2020, DOI: 10.1029/2020JE006606 [Link]

Riu, L. et al. (incl. Matsuoka, M.) (2020). “Spectral characterization of the craters of Ryugu as observed by the NIRS3 instrument on-board Hayabusa2”. Icarus, 114253, DOI:10.1016/j.icarus.2020.114253 [Link]

Nakada, R., Usui, T., Ushioda, M., Takahashi, Y. (2020). "Vanadium micro-XANES determination of oxygen fugacity in olivine-hosted glass inclusion and groundmass glasses of martian primitive shergottite Yamato 980459" American Mineralogist, 105: 1695–1703 [Link]

Tatsumi, E. et al. (incl. Matsuoka, M.) (2020). “Global photometric properties of (162173) Ryugu”. Astronomy & Astrophysics, 639, A83, 2020, DOI: 10.1051/0004-6361/201937096 [Link]

Galiano, A. et al. (incl. Matsuoka, M.) (2020). “Characterization of the Ryugu surface by means of the variability of the near-infrared spectral slope in NIRS3 data”. Icarus, 113959., 2020, DOI: 10.1016/j.icarus.2020.113959 [Link]

Noguchi, R., Ishiyama, K., Kumamoto, A., Uemura, C., Kasaba, Y., Usui, T., Oura, A., and Shoji, D., “Radar Sounding of Subsurface Structure in Eastern Coprates and Capri Chasmata, Mars” Geophysical Research Letters, 47, e2020GL088556, DOI: 10.1029/2020GL088556 [Link]

Hyodo, R. and Genda, H.(2020) “Escape and Accretion by Cratering Impacts: Formulation of Scaling Relations for High-speed Ejecta”. ApJ, 898 30 [Link]

Rothery D., Massironi M., Alemanno G., et al. (incl. Hyodo, R.) (2020). “Rationale for BepiColombo Studies of Mercury’s Surface and Composition”. Space Science, Reviews Vol. 216, pp. 66 [Link]

Morota et al. (incl. M. Kanamaru, N. Sakatani, M. Matsuoka, R. Noguchi) (2020) Sample collection from asteroid (162173) Ryugu by Hayabusa2: Implications for surface evolution, Science, Vol. 368, pp. 654-659 DOI: 10.1126/science.aaz6306[Link][JAXA Press Release, JP]

Usui, T., Bajo, K., Fujiya, W., Furukawa, Y., Koike, M., Miura, Y. N., Sugahara, H., Tachibana, S., Takano, Y., Kuramoto, K. (2020) The Importance of Phobos Sample Return for Understanding the Mars-moon System. Space Science Reviews. doi: 10.1007/s11214-020-00668-9[Link]

Koike, M., Nakada, R., Kajitani, I., Usui, T., Tamenori, Y., Sugahara, H., and Kobayashi, A. (2020) In-situ preservation of nitrogen-bearing organics in Noachian Martian carbonates, Nature Communications, Vol. 11, pp. 1-7, DOI:10.1038/s41467-020-15931-4[Link] [Tokyo Tech][EurekAlart!]

Rosenblatt, P., Hyodo, R., et al. (2020), The Formation of the Martian Moons, Oxford Research Encyclopedias. DOI: 10.1093/acrefore/9780190647926.013.24[Link]

Arakawa et al. (incl. N. Sakatani, M. Matsuoka, R. Noguchi) (2020) An artificial impact on the asteroid 162173 Ryugu formed a crater in the gravity-dominated regime, Science, eaaz1701[Link][JAXA Press Release]

Okada et al. (incl. N. Sakatani, M. Matsuoka, R. Noguchi) (2020) Highly porous nature of a primitive asteroid revealed by thermal imaging, Nature, Vol. 579, pp. 518-522[Link][JAXA Press Release]

Ramirez R. S., Craddock R. A. and Usui, T. (2020) Climate Simulations of Early Mars With Estimated Precipitation, Runoff, and Erosion Rates, JGR Planets, DOI: 10.1029/2019JE006160[Link][ELSI press release, EN][ELSI press release, Jp][Many Worlds]

Matsuoka, M., Nakamura, T., Hiroi, T., Okumura, S. and Sasaki, S. (2020) Space Weathering Simulation with Low-energy Laser Irradiation of Murchison CM Chondrite for Reproducing Micrometeoroid Bombardments on C-type Asteroids, ApJL, DOI:10.3847/2041-8213/ab72a4[Link]

Moriwaki, R., Usui, T., Tobita, M. and Yokoyama T. (2020) Geochemically heterogeneous Martian mantle inferred from Pb isotope systematics of depleted shergottites, Geochim. Cosmochim. Acta, DOI:10.1016/j.gca.2020.01.014 [Link]

Asaah, A. et al. (incl. Usui, T.) (2020) Major/trace elements and Sr–Nd–Pb isotope systematics of lavas from lakes Barombi Mbo and Barombi Koto in the Kumba graben, Cameroon volcanic line: Constraints on petrogenesis, Journal of African Earth Sciences, DOI:10.1016/j.jafrearsci.2019.103675 [Link]


Hyodo R., Kurosawa K., Genda H., Usui T. and Fujita K. (2019) Transport of impact ejecta from Mars to its moons as a means to reveal Martian history, Sci Rep, 9, 19833 , DOI:10.1038/s41598-019-56139-x [Link][Tokyo Tech][Cosmos blog][Yahoo]

Scholten F. et al. (incl. Sakatani, N., Matsuoka, M.) (2019) The descent and bouncing path of the Hayabusa2 lander MASCOT at asteroid (162173) Ryugu, A&A, 632, L3 [Link]

Preusker F. et al. (incl. Sakatani, N., Matsuoka, M.) (2019) The MASCOT landing area on asteroid (162173) Ryugu: Stereo-photogrammetric analysis using images of the ONC onboard the Hayabusa2 spacecraft, A&A, 632, L4 [Link]

Lawrence D. J. et al. (incl. Usui, T.) (2019) Measuring the Elemental Composition of Phobos: The Mars‐moon Exploration with GAmma rays and NEutrons (MEGANE) Investigation for the Martian Moons eXploration (MMX) Mission, EARTH SPACE SCI, DOI: 10.1029/2019EA000811 [Link]

Hirata N. et al. (incl. Noguchi, R., Sakatani, N., Matsuoka, M.) (2019) The spatial distribution of impact craters on Ryugu, Icarus, 338, 113527 [Link]

Grott, M. et al. (incl. Sakatani, N.) (2019) Low thermal conductivity boulder with high porosity identified on C-type asteroid (162173) Ryugu, Nature Astronomy, DOI:10.1038/s41550-019-0832-x [Link]

Kagami, S., Haba, M., Yokoyama, T., Usui, T., and Greenwood R. C. (2019) Geochemistry and Sm‐Nd chronology of a Stannern‐group eucrite, Northwest Africa 7188, Meteoritics & Planetary Science, DOI:10.1111/maps.13382 [Link]

Barucci, M. A. et al. (incl. Matsuoka, M., Satakani, N.) (2019) Multivariable statistical analysis of spectrophotometry and spectra of (162173) Ryugu as observed by JAXA Hayabusa2 mission. Astron. Astrophys. 629, A13.[Link]

Noguchi, R., Nishizawa T., Kanda W., Ohkura T., and Terada A. (2019) Installation of New GNSS Network Around Kusatsu-Shirane Volcano, Japan: Its Perspective and the First Result, J. Disaster Res. DOI: 10.20965/jdr.2019.p0744 [Link]

Jia, T. Z., Chandru, K., Hongo, Y., Afrin, R., Usui, T. Myojo, K., and Cleaves Ⅱ, H. J. (2019) Membraneless polyester microdroplets as primordial compartments at the origins of life, PNAS, DOI:10.1073/pnas.1902336116 [Link] [Tokyo Tech][EurekAlart!]

Ogawa, K. et al. (incl. Sakatani, N.) (2019) Possibility of estimating particle size and porosity on Ryugu through MARA temperature measurements, Icarus, 333, pp. 318-322. [Link]

Biele, J. et al. (incl. Sakatani, N.) (2019) Effects of dust layers on thermal emission from airless bodies, Earth and Planetary Science, DOI: 10.1186/s40645-019-0291-0. [Link]

Fujiya, W. et al. (incl. Koike, M.) (2019) Migration of D-type asteroids from the outer Solar System inferred from carbonate in meteorites, Nature astronomy, DOI: 10.1038/s41550-019-0801-4. [Link]

Michikami, T. et al. (incl. Matsuoka, M., Sakatani, N., Noguchi, R.) (2019) Boulder size and shape distributions on asteroid Ryugu, Icarus, 331, pp.179-191. [Link]

Arakawa, S., Tatsuuma, M., Sakatani, N. and Nakamoto, T. (2019) Thermal conductivity and coordination number of compressed dust aggregates, Icarus, 324, pp. 8-14. [Link]

Tatsumi, E. et al. (incl. Sakatani, N.) (2019) Updated inflight calibration of Hayabusa2's optical navigation camera (ONC) for scientific observations during the cruise phase, Icarus, 325, pp.153-195. [Link]

Hirabayashi, M. et al. (incl. Sakatani, N.) (2019) The western bulge of 162173 Ryugu formed as a result of a recent deformation process, The Astrophysical Journal Letters, 874:L10. [Link]

Geshi. N., K. Németh, Noguchi, R. and Oikawa T. (2019) Shift from magmatic to phreatomagmatic explosions controlled by the lateral evolution of a feeder dike in the Suoana-Kazahaya eruption, Miyakejima Volcano, Japan, Earth and Planetary Science Letters, 511, 177-189, DOI: 10.1016/j.epsl.2019.01.038. [Link]

International MSR Objectives and Samples Team (iMOST) et al. (incl. Usui, T.) (2019) The potential science and engineering value of samples delivered to Earth by Mars sample return, Meteoritics & Planetary Science. 54, Issue 3, Comment. [Link]

Watanabe, S. et al. (incl. Noguchi, R., Shimaki, Y., Sakatani, N., Matsuoka, M.) (2019) Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu—A spinning top–shaped rubble pile, Science. DOI: 10.1126/science.aav8032 [Link]

Sugita, S. et al. (incl. Sakatani, N., Matsuoka, M., Shimaki, Y., Noguchi, R.) (2019) The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes, Science. DOI: 10.1126/science.aaw0422 [Link]

Kitazato, K. et al. (incl. Matsuoka, M., Sakatani, N., Shimaki, Y.) (2019) The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy, Science. DOI: 10.1126/science.aav7432 [Link]

Usui, T. (2019) What Geology and Mineralogy Tell Us About Water on Mars, in "Astrobiology" (Eds. A. Yamagishi, T. Kakegawa and T. Usui), Springer. [Link]

DW Beaty et al. (incl. Usui, T.) (2019) The potential science and engineering value of samples delivered to Earth by Mars sample return, Meteoritics & Planetary Science, 54, Issue S1. [Link]

Usui, T. (2019) Hydrogen reservoirs in Mars as revealed by Martian meteorites, in "Volatiles In The Martian Crust" (Eds. Filiberoto J. and Schwenzer S. P.), Elsevier. [Link]


Noguchi, R., Hamada, A., Suzuki, A.I., and Kurita, K. (2018) Experimental approach to rootless eruptions using kitchen materials, Earth, Planets and Space, 70:208, DOI: 10.1186/s40623-018-0974-6 [Open Access]

Usui, T. (2018) Scientific Significance and Strategy of Mars Subsurface Exploration, Yuseijin, 27, 296-301. [Link]

Yoshimura, Y. et al. (incl. Usui, T.) (2018) Development of Life Detection Microscope (LDM) for life search on Mars, Yuseijin, 27,147-141. [Link]

Kuramoto, K. et al. (incl. Usui, T.) (2018) Martian Moons eXploration MMX elucidating the formation of habitable planets in the solar system, Yuseijin, 27, 207-215. [Link]

Wada, K. et al. (incl. Sakatani, N.) (2018) Asteroid Ryugu before the Hayabusa2 encounter. Progress in Earth and Planetary Science. [Link]

Greenwood, J. P., Karato, S., Vander Kaaden, K. E., Pahlevan, K., and Usui, T. (2018) Water and Volatile Inventories of Mercury, Venus, the Moon, and Mars. Space Science Reviews. 214, 92-. [Link]

Kurokawa, H., Foriel, J., Laneuville, M., Houser, C., and Usui, T. (2018) Subduction and atmospheric escape of Earth's seawater constrained by hydrogen isotopes. Earth and Planetary Science Letters 497, 149-160 [Link]

Nakanishi, N., Yokoyama, T., Okabayashi, S., Usui, T. and Iwamori, H. (2018) Re-Os isotopic systematics and fractionation of siderophile elements in metal phases from CBa chondrites. Meteoritics and Planetary Science, 53, 1051-1065 [Link]

Kurokawa, H., Kurosawa, K., and Usui, T. (2018) A lower limit of atmospheric pressure on early Mars inferred from nitrogen and argon isotopic compositions. Icarus, 299, 443-459. [Link]

Yamagishi, A. et al. (incl. Usui, T.) (2018) LDM (Life Detection Microscope): In situ imaging of living cells on surface of Mars. The 31st ISTS Special Issue of Transaction of JSASS, Aerospace Technology Japan, 16, 299-305 [Link]

Koike, M., Moriwaki, R., and Usui, T. (2018) Current and future contributions of martian meteorites to Mars science. Yuseijin, 27, 180-188. [Link]

Sakatani, N., Ogawa, K., Arakawa, M., and Tanaka, S. (2018) Thermal conductivity of lunar regolith simulant JSC-1A under vacuum. Icarus, 309, 13-24. [Link]

Ishida, A., Koike, M., Takahata, N., Morita, T., David, J., Pinti, D. L., and Sano, Y. (2018) Hydrogen isotope analysis of micro-scale apatite inclusions in Archaean zircon grains. Geochemical Journal, 52, 457-466. [Link]

Shoji, D., Noguchi, R., Otsuki, S., and Hino, H. (2018) Classification of volcanic ash particles using a convolutional neural network and probability. Scientific Reports 12/2018; 8(1), DOI:10.1038/s41598-018-26200-2 [Link]

Okada, T. et al. (incl. Sakatani, N.) (2018) Earth and moon observations by thermal infrared imager on Hayabusa2 and the application to detectability of asteroid 162173 Ryugu. Planetary and Space Science, 158, 46-52. [Link]

Suzuki, H. et al. (incl. Sakatani, N.) (2018) Initial inflight calibration for Hayabusa2 optical navigation camera (ONC) for science observations of asteroid Ryugu. Icarus, 300, 341-359. [Link]


Usui, T. (2017) Martian water stored underground. Nature, 552, 339-340. [Link]

Moriwaki, R., Usui, T., Simon, J. I., Jones, J. H., Yokoyama, T., and Tobita, M. (2017) Coupled Pb isotopic and trace element systematics of Tissint meteorite: geochemical signatures of the depleted shergottite source mantle. Earth and Planetary Science Letters, 474, 180-189. [Link]

Fukami, Y., Tobita, M., Yokoyama, T., Usui, T., and Moriwaki, R. (2017) Precise isotope analysis for sub-nanogram lead by total evaporation thermal ionization mass spectrometry (TE-TIMS) coupled with 204Pb-207Pb double spike method. Journal of Analytical Atomic Spectrometry, 32, 848-857. [Link]

Tobita, M., Usui, T., and Yokoyama, T. (2017) New constraints on shergottite petrogenesis from analysis of Pb isotopic compositional space: implications for mantle heterogeneity and crustal assimilation on Mars. Geochemical Journal. 51, 81-94. [Link]

Kitadai, N., Oonishi, H., Umemoto, K., Usui, T., Fukushi, K., and Nakashima, S. (2017) Glycine polymerization on oxide minerals. Origins of Life and Evolution of Biospheres, DOI: 10.1007/s11084-016-9516-z. [Link]

Tashiro, T., Ishida, A., Hori, M., Igisu, M., Koike, M., Mejean, P., Takahata, N., Sano, Y., and Komiya, T. (2017) Early trace of life from 3.95 Ga sedimentary rocks in Labrador, Canada. Nature, 549, 516-518, DOI: 10.1038/nature24019 [Link]

Koike, M., Sugiura, N., Takahata, N., Ishida, A., and Sano, Y. (2017) U-Pb and Hf-W dating of young zircon in mesosiderite Asuka 882023. Geophysical Research Letters, 44, 1251-1259, DOI: 10.1002/2016GL071609 [Link]

Matsuoka, M., Nakamura, T., Osawa, T., Iwata, T., Kitazato, K., Abe, M., Nakauchi, Y., Arai, T., Komatsu, M., Hiroi, T., Imae, N., Yamaguchi, A., and Kojima, H. (2017). An evaluation method of reflectance spectra to be obtained by Hayabusa2 Near-Infrared Spectrometer (NIRS3) based on laboratory measurements of carbonaceous chondrites. Earth, Planets and Space, 69 (1), 120. [Link]

Sakatani, N., Ogawa, K., Iijima, Y., Arakawa, M., Honda, R., and Tanaka, S. (2017) Thermal conductivity model for powdered materials under vacuum based on experimental studies, AIP Advances, 6, 015310, 2017. [Link]

Arai, T. et al. (incl. Sakatani, N.) (2017) Thermal Imaging Performance of TIR Onboard the Hayabusa2 Spacecraft. Space Science Reviews, 208, 239-254. [Link]

Okada, T. et al. (incl. Sakatani, N.) (2017) Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2, Space Science Reviews, 208, 255-286. [Link]

Ogawa, K. et al. (incl. Sakatani, N.) (2017) System Configuration and Operation Plan of Hayabusa2 DCAM3-D Camera System for Scientific Observation During SCI Impact Experiment, Space Science Reviews, 208, 125-142. [Link]

Ishibashi, K. et al. (incl. Sakatani, N.) (2017) Performance of Hayabusa2 DCAM3-D Camera for Short-Range Imaging of SCI and Ejecta Curtain Generated from the Artificial Impact Crater Formed on Asteroid 162137 Ryugu (1999 JU3), Space Science Reviews, 208, 213-238. [Link]

Arakawa, M. et al. (incl. Sakatani, N.) (2017) Scientific Objectives of Small Carry-on Impactor (SCI) and Deployable Camera 3 Digital (DCAM3-D): Observation of an Ejecta Curtain and a Crater Formed on the Surface of Ryugu by an Artificial High-Velocity Impact. Space Science Reviews, 208, 187-212. [Link]


Ehlmann, B. L. et al. (incl. Usui, T.) (2016) The sustainability of habitability on terrestrial planets: insights, questions, and needed measurements from Mars for understanding the evolution of Earth-like worlds. Journal of Geophysical Research-Planets, 121, DOI: 10.1002/2016JE005134 [Open Access] [Top-10 most downloaded paper in 2016-2017 JGR]

Kurokawa, H., Usui, T., and Sato, M. (2016) Interactive evolution of multiple water-ice reservoirs on Mars: Insight from hydrogen isotope compositions. Geochemical Journal, 50, 67–79. DOI:10.2343/geochemj.2.0407 [Link]

Miyamoto, H., Komatsu, G., Dohm, J., Hammi, R., Usui, T., and Yamagishi, A. (2016) Geomorphological view of the environmental history and candidate habitable environments on Mars. Journal of Geography, 125, 171-184. DOI:10.5026/jgeography.125.171 [Link]

Koike, M., Sano, Y., Takahata, N., Ishida, A., Sugiura, N., Anand, M. (2016) Combined investigation of H isotopic compositions and U-Pb chronology of young Martian meteorite Larkman Nunatak 06319. GEOCHEMICAL JOURNAL, 50, 363-377, DOI: 10.2343/geochemj.2.0424 [Link]

Noguchi, R., Hoskuldsson, A., and Kurita, K. (2016) Detailed topographical, distributional, and material analyses of rootless cones in Myvatn, Iceland. Journal of Volcanology and Geothermal Research, 04/2016, 318, DOI:10.1016/j.jvolgeores.2016.03.020 [Link]

Noguchi, R. and Kurita, K. (2016) Cones on Mars with Special Reference to Volcanic Cone Morphology. 地学雑誌125(1):35-48, DOI:10.5026/jgeography.125.35 [Link]

Sakatani, N., Ogawa, K., Iijima, Y., Arakawa, M., and, Tanaka, S. (2016) Compressional stress effect on thermal conductivity of powdered materials: Measurements and their implication to lunar regolith. Icarus, 267, 1-11 [Link]

Iwata, T. et al. (incl. Matsuoka, M.) (2016). NIRS3: the near infrared spectrometer on Hayabusa2. Space Science Reviews, pp 1-21. [Link]


Peters, T. J., Simon, J. I., Jones, J. H., Usui, T., Moriwaki, R., Economos, R. C., Schmitt, A. K., and McKeegan, K. D. (2015) Tracking the source of the enriched martian meteorites in olivine-hosted melt inclusions of two depleted shergottites, Yamato 980459 and Tissint. Earth and Planetary Science Letters 418, 91–102. [Link]

Usui, T., Alexander, C. M.O'D., Wang, J., Simon, J. I., and Jones, J. H. (2015) Meteoritic evidence for a previously unrecognized hydrogen reservoir on Mars. Earth and Planetary Science Letters 410, 140-151. [Link] [Top-rated article in EPSL] [NASA press release]

Usui, T., Jones, J. H., and Mittlefehldt, D. W. (2015) A partial melting study of an ordinary (H) chondrite composition with application to the unique achondrite Graves Nunataks 06128 and 06129. Meteoritics & Planetary Science 50, 759-781. [Link]

Asaah, A. N. E., Yokoyama, T., Aka, F. T., Usui, T., Kuritani, T., Wirmvem, M. J., Iwamori, H., Fozing, E. M., Tamen, J., Mofor, G. Z., Ohba, T., Tanyileke, G., and Hell, J. V. (2015) Geochemistry of lavas from maar-bearing volcanoes in the Oku Volcanic Group of the Cameroon Volcanic Line. Chemical Geology 406, 55-69. [Link]

Matsuoka, M., Nakamura, T., Kimura, Y., Hiroi, T., Nakamura, R., Okumura, S., and Sasaki, S. (2015). Pulse-laser irradiation experiments of Murchison CM2 chondrite for reproducing space weathering on C-type asteroids. Icarus, 254, pp 135-143. [Link]

Noguchi, R. and Kurita, K. (2015) Unique characteristics of cones in Central Elysium Planitia, Mars. Planetary and Space Science, 03/2015; 111(1), DOI:10.1016/j.pss.2015.03.007 [Link]


Usui, T. and Miyamoto, H. (2014) Toward Future Mars Exploration Missions: Our Heritage and New Challenges. Chikyu Kagaku. 48, 221‒230. [Link]

Kurokawa, H., Sato, M., Ushioda, M., Matsuyama, T., Moriwaki, R., Dohm, J. M., and Usui, T. (2014) Evolution of Water Reservoirs on Mars: Constraints from Hydrogen Isotopes in Martian Meteorites. Earth and Planetary Science Letters 394, 179-185. [Link]

Asaah, A. N. E., Yokoyama, T., Aka, F. T., Usui, T., Wirmvem, M. J., Tchamabe, B. C., Ohba, T., Tanyileke, G., and Hell, J. V. (2014) A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints. Geoscience Frontiers. DOI: 10.1016/j.gsf.2014.04.012 [Link]

Koike, M., Ota, Y., Sano, Y., Takahata, N., and Sugiura, N. (2014) High-spatial resolution U-Pb dating of phosphate minerals in Martian meteorite Allan Hills 84001. GEOCHEMICAL JOURNAL, 48, 423-431, DOI: 10.2343/geochemj.2.0319 [Link]

Zolensky, M. et al. (incl. Matsuoka, M.) (2014) Mineralogy and petrography of C asteroid regolith: The Sutter's Mill CM meteorite. Meteoritics & Planetary Science, 49, pp 1997-2016. [Link]

Sakatani, N., Ogawa, K., Iijima, Y., Honda, R., and Tanaka, S. (2013) Thermal conductivity measurement for glass beads under vacuum: For application to solid planetary science. Thermal Science & Engineering, 21 (1), 1-12. [Link]

Ogawa, K., Iijima, Y., Sakatani, N., Ohtake, H., and Tanaka, S. (2014) A thermal control system for long-term survival of scientific instruments on lunar surface, Review of Scientific Instruments, 85, 035108. [Link]

Arakawa, M., Yasui, M., and Shimaki, Y. (2014) High-Velocity Impact Phenomena in the Solar System Related to the Origin and Evolution of Planets. The Review of High Pressure Science and Technology 24.1 : 13-20. [Link]


Usui, T. and Iwamori, H. (2013) Mixing relations of the howardite-eucrite-diogenite suite: a new statistical approach of independent component analysis for the Dawn mission. Meteoritics & Planetary Science 48, 2289-2299. [Link]

Barnes, J. J., Franchi, I. A., Anand, M., Tartese, R., Starkey, N. A., Koike, M., Sano, Y., and Russel, S. S. (2013) Accurate and precise measurements of the D/H ratio and hydroxyl content in lunar apatites using NanoSIMS. Chemical Geology, 337-338, 48-55. [Link]


Namiki, N., Komatsu, G., and Usui, T. et al. (2012) A proposal for rover geological exploration on Mars. The Journal of the Geological Society of Japan 118, 606-617. [Link]

Usui, T., Alexander, C. M.O'D., Wang, J., Simon, J. I., and Jones, J. H. (2012) Origin of water and mantle–crust interactions on Mars inferred from hydrogen isotopes and volatile element abundances of olivine-hosted melt inclusions of primitive shergottites. Earth and Planetary Science Letters 357-358, 119-129. [LINK] [NASA press release]

Sakatani, N., Ogawa, K., Iijima, Y., Honda, R., and Tanaka, S. (2012) Experimental study for thermal conductivity structure of lunar surface regolith: Effect of compressional stress. Icarus, 221, 1180-1182. [Link]

Shimaki, Y. and Arakawa, M. (2012) Experimental study on collisional disruption of highly porous icy bodies. Icarus, 218(2), 737-750. [Link]

Shimaki, Y. and Arakawa, M. (2012) Low-velocity collisions between centimeter-sized snowballs: Porosity dependence of coefficient of restitution for ice aggregates analogues in the Solar System. Icarus, 221(1), 310-319. [Link]


Usui, T. (2011) New views of Mars: Reviews of recent Mars explorations and meteorites studies. Chikyu Kagaku. 45, 159-173. [Link]

Shimaki, Y., Arakawa, M., and Yasui, M. (2011). Impact Experiments on Sintered Snowballs. in Physics and Chemistry of Ice 2010, Hokkaido University Press, 379-386.


Usui, T., Sanborn, M., Wadhwa, M., and McSween, H. Y. (2010). Petrology and trace element geochemistry of Robert Massif 04261 and 04262 meteorites, the first examples of geochemically enriched lherzolitic shergottites. Geochimica et Cosmochimica Acta 74, 7283-7306. [Link]

Usui, T., McSween, H. Y., Mittlefehldt, D. W., and Prettyman, T. H. (2010). K-Th-Ti systematics and new three-component mixing model of HED meteorites: Prospective study for interpretation of gamma-ray and neutron spectra for the Dawn mission. Meteoritics & Planetary Science 45, 1170-1190. [Link]


Arakawa, M., Yasui, M., and Shimaki, Y. (2009) Collisional Disruption of Icy Planetesimals. The astronomical herald 102(2), 127-133.


Usui, T., McSween, H. Y., and Clark, B. C. III. (2008). Petrogenesis of high-phosphorous Wishstone-class rocks in Gusev crater, Mars. Journal of Geophysical Research–Planets 113, E12S44, doi:10.1029/2008JE003225 [Link]

Usui, T., McSween, H. Y., and Floss, C. (2008). Petrogenesis of olivine-phyric shergottite Yamato-980459, revisited. Geochimica et Cosmochimica Acta 72, 1711-1730. [Link]


Usui, T. and McSween, H. Y. (2007). Geochemistry of 4 Vesta based on HED meteorites: Prospective study for interpretation of gamma ray and neutron spectra for the Dawn mission. Meteoritics & Planetary Science 42, 269–283. [Link]

Usui, T., Kobayashi, K., Nakamura, E., and Helmstaedt, H. (2007). Trace element fractionation in deep subduction zones inferred from a lawsonite-eclogite xenolith from the Colorado Plateau. Chemical Geology 239, 336-351. [Link]


Kuritani, T., Usui, T., Yokoyama, T., and Nakamura, E. (2006). Accurate isotopic and concentration analyses of small amounts of Pb using isotope dilution coupled with the double spike technique. Geostandards and Geoanalytical Research 30, 209-220. [Link]

Usui, T., Nakamura, E., and Helmstaedt, H. (2006). Petrology and geochemistry of eclogite xenoliths from the Colorado Plateau: Implications for the evolution of the subducted oceanic crust. Journal of Petrology 47, 929–964. [Link]


Usui, T., Nakamura, E., Kobayashi, K., Maruyama, S., and Helmstaedt, H. (2003). Fate of the subducted Farallon plate inferred from eclogite xenoliths in the Colorado Plateau. Geology 30, 589-592. [Link]


Usui, T., Kobayashi, K., and Nakamura, E. (2002). U-Pb isotope systematics of micro-zircon inclusions: Implications for the age and origin of eclogite xenolith from the Colorado Plateau. Proceedings of the Japan Academy 78, 51-56. [Link]