Curriculum Vitaes
Profile Information
- Affiliation
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Researcher number
- 00270439
- ORCID ID
https://orcid.org/0000-0003-4780-800X- J-GLOBAL ID
- 200901004756228297
- researchmap Member ID
- 5000050882
Research Areas
1Papers
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METEORITICS & PLANETARY SCIENCE, Feb 23, 2026
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Meteoritics & Planetary Science, Jan, 2026
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Meteoritics & Planetary Science, Nov 25, 2025Abstract Analyzing primitive extraterrestrial samples from asteroids is key to understanding the evolution of the early solar system. The OSIRIS‐REx mission returned samples from the B‐type asteroid Bennu, providing a valuable opportunity to compare them with the Ryugu samples collected by the Hayabusa2 mission. This study examines the representativeness of a fraction of the Bennu samples, which was allocated from NASA to JAXA, by nondestructive characterization of their physical and spectral properties without atmospheric exposure. The reflectance and observed spectral features in the visible‐to‐infrared range of the Bennu sample resemble those from the spectroscopic analysis of different fractions. Additionally, we found differences in the slope of the visible range and band‐center of ~2.7 μm band between the samples and the asteroid surface, which could be explained by the degree of space weathering. A comparative analysis of the Bennu and Ryugu samples revealed spectral similarities, including absorption features indicative of Mg‐rich phyllosilicates, organics, and carbonates, without any evidence of sampling bias or terrestrial alteration. This finding can be used as a benchmark for subsequent Ryugu–Bennu comparative studies.
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NATURE COMMUNICATIONS, 16(1), Nov 4, 2025
Misc.
494-
日本惑星科学会秋季講演会予稿集, 2003 94-87, Oct 8, 2003Asteroid 4 Vesta is a peculiar asteroid due to its basaltic composition. Many multi-band observations for Vesta were carried out and at last the image of Vesta were obtained by Hubble Space Telescope in 1994, and a geologic map was made.2003. <BR> We made the visual observation using a transportable 10 cm refracting telescope with a MUTOH CV-16 CCD in ECAS filter system. Infrared observations were carried out using 105cm Schmidt telescope with Mitsubishi 1040 x 1040 PtSi CSD (KONIC) in H band at Kiso Observatory. And we made spectroscopic observation (500nm to 900nm) using a 65 cm reflecting telescope and GCS (Gunma Compact Spectrograph) at Gunma Astronomical Observatory.<BR>We report consideration of the effect of space weathering as well as the inhomogeneous distribution of minerals on the surface of Vesta.<BR>
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GEOPHYSICAL RESEARCH LETTERS, 30(17), Sep, 2003
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ASTRONOMY & ASTROPHYSICS, 405(3) L29-L32, Jul, 2003
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PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 55(3) 691-699, Jun, 2003
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ASTRONOMY & ASTROPHYSICS, 397(1) 325-328, Jan, 2003
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EARTH PLANETS AND SPACE, 55(6) 341-347, 2003
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 28-28, 2003
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 86-86, 2003Building up the New Minor Body Exploration Missions in the Post-Hayabusa Era
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 28-28, 2003衝突クレーター形成過程において、サイズ等を支配するパラメーターが、標的が岩石等の場合は物質強度、標的がレゴリス等の場合は表面重力であることは様々な研究により明らかにされている。しかし、標的がレゴリスでかつ表面重力が微小な場合に、どのようなパラメターにより支配されるかは明らかでない。このような領域でのクレーター形成過程を定量的に明らかにすることは、小惑星の表面進化過程を研究するうえで重要である。今回我々は、落下カプセルを用いた微小重力環境下でのクレーター形成実験を行ったので、その結果を発表する。
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 74-74, 2003Space weathering has been invoked to explain the mismatched spectra between asteroid type and meteorite classes. It affects on the reflectance spectra as the darkening and reddening of planetary surface materials and the changes to the depths of absorption bands.<BR> In this study we measured the bidirectional diffused reflectance spectra of L6 chondrite Yamato-75102, from 300nm to 2600nm with the particle size varied. The sample is not so suffered by weathering on terrestrial. We discuss quantitatively the dependence on particle size for the reflectance spectra characterization.
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 86-86, 2003Building up the New Minor Body Exploration Missions in the Post-Hayabusa Era
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 82-82, 20032003年5月9日に打ち上げられた小惑星探査機はやぶさには近赤外線分光器（NIRS)が搭載されている。これまでの数ヶ月の初期運用中にNIRSの動作チェックも実施された。本講演ではNIRSの動作チェックの内容と結果について報告する。
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2003 87-87, 2003Asteroid 4 Vesta is a peculiar asteroid due to its basaltic composition. Many multi-band observations for Vesta were carried out and at last the image of Vesta were obtained by Hubble Space Telescope in 1994, and a geologic map was made.2003. <BR> We made the visual observation using a transportable 10 cm refracting telescope with a MUTOH CV-16 CCD in ECAS filter system. Infrared observations were carried out using 105cm Schmidt telescope with Mitsubishi 1040 x 1040 PtSi CSD (KONIC) in H band at Kiso Observatory. And we made spectroscopic observation (500nm to 900nm) using a 65 cm reflecting telescope and GCS (Gunma Compact Spectrograph) at Gunma Astronomical Observatory.<BR>We report consideration of the effect of space weathering as well as the inhomogeneous distribution of minerals on the surface of Vesta.<BR>
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European Space Agency, (Special Publication) ESA SP, (500) 103-106, Jul 1, 2002
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2002 57-57, 2002
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2002 24-24, 2002
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Abstracts for fall meeting of the Japanese Society for Planetary Science, 2002 20-20, 2002
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日本惑星科学会秋季講演会予稿集, 2001 43-43, Oct 6, 2001We have performed near IR photometric and spectroscopic observations of MUSES-C target object 1998 SF36 by SUBARU/IRCS during 10th ard 11th an March, 2001. We obtained photometric data in JHKL'M', and a spectroscopic data in L JHK photometry reveals that 1998 SF36 is classified in S-type asteroid. Together with M'L' photometry and spectrotroscopy in L band, we discuss a surface temperature and albedo of 1998 SF36.
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2001 30-30, Oct 6, 2001The MUSES-C, the near Earth object sample return mission will employ the impact sampling device, which has recently completed its flight model design and manufacturing. It implemented results from collection efficiency tests under the microgravity condition as well as contamination control protocols for returned samples.
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2001 42-42, Oct 6, 2001We performed visible photometry (B,V,R,I) of Near Earth Asteroid 1998 SF36, which is a target body of MUSES-C mission, in March and August 2001 at Kiso observatory. We got light curve and color index of this asteroids and compared it with others. As a result, we suppose taxonomy type of this asteroid is S-type, composition of surface is uniform and spin axis is perpendicular to ecliptic plane. We also detect the change of mean magnitude and rotational periods. We will mention about it in our talk.
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2001 43-43, Oct 6, 2001We have performed near IR photometric and spectroscopic observations of MUSES-C target object 1998 SF36 by SUBARU/IRCS during 10th ard 11th an March, 2001. We obtained photometric data in JHKL'M', and a spectroscopic data in L JHK photometry reveals that 1998 SF36 is classified in S-type asteroid. Together with M'L' photometry and spectrotroscopy in L band, we discuss a surface temperature and albedo of 1998 SF36.
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2001 44-44, Oct 6, 2001
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測地学会誌, 47(1) 514-520, Mar 25, 2001
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Journal of the Communications Research Laboratory, 48(1) 143-150, Mar, 2001
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日本惑星科学会誌 遊・星・人, 9(4) 216-226, Dec 25, 2000
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日本惑星科学会誌 遊・星・人, 9(4) 176-185, Dec 25, 2000
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Planetary people, 9(4) 176-185, Dec 1, 2000
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Planetary people, 9(4) 216-226, Dec 1, 2000
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2000 75-75, Oct 31, 2000
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2000 70-70, Oct 31, 2000
Books and Other Publications
3
Presentations
2Research Projects
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2019 - Mar, 2022
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2016 - Mar, 2019
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2006 - 2007
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2005 - 2006
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, 2002 - 2003
