Curriculum Vitaes
Profile Information
- Affiliation
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Degree
- Doctor of Science(Mar, 1989, The University of Tokyo)
- Contact information
- yoshikawa.makoto
jaxa.jp - J-GLOBAL ID
- 200901037361657011
- researchmap Member ID
- 1000304540
Research Interests
6Research Areas
2Research History
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Apr, 1998 - Sep, 2003
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Apr, 1991 - Mar, 1998
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Dec, 1996 - Dec, 1997
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Apr, 1989 - Mar, 1991
Education
2-
Apr, 1984 - Mar, 1989
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Apr, 1980 - Mar, 1984
Committee Memberships
9-
Oct, 2020 - Present
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Apr, 1994 - Present
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Jan, 2013 - Mar, 2015
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Jan, 2011 - Dec, 2012
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2009 - 2011
Awards
2-
Nov, 2019
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Dec, 2018
Papers
313-
Icarus, 452 117023-117023, Jul, 2026
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The Planetary Science Journal, 7(5) 114-114, May 1, 2026Abstract Aqueous alteration was one of the earliest geological processes in the solar system and significantly shaped the mineralogical diversity observed in primitive minor bodies. Carbonate minerals are reliable tracers of the physicochemical conditions during alteration processes on early planetesimals. We present a comprehensive characterization of carbonates in the returned samples of asteroids Ryugu and Bennu, performed using the MicrOmega near-infrared hyperspectral microscope. We identify two major carbonate species, dolomite (CaMg(CO 3 ) 2 ) and breunnerite ((Mg,Fe)CO 3 ), with similar relative abundances and mean elemental compositions on both asteroids, indicating analogous aqueous alteration pathways on their parent bodies. A general spatial separation of dolomite and breunnerite is observed, indicating that at size scales of 10–100 μ m, alteration conditions favored the precipitation of one species over the other. We interpret this as evidence for a spatially heterogeneous local water–rock ratio, suggesting that a high local water–rock ratio suppresses the formation of dolomite, instead favoring precipitation of breunnerites. Based on relative carbonate abundances, we conclude that chambers A (sampling the surface) and C (predominantly sampling the subsurface) of the Ryugu sample contain different mixtures of lithologies with different alteration degrees.
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The Planetary Science Journal, 7(5) 121-121, May 1, 2026Abstract The Hayabusa2 extended mission, nicknamed Hayabusa2# ( # is pronounced SHARP, which stands for the Small Hazardous Asteroid Reconnaissance Probe), is JAXA’s small body explorer to conduct science and engineering investigations in space. After the successful return to the Earth with the samples from the carbonaceous asteroid (162173) Ryugu on 2020 December 6, Hayabusa2 diverted away from Earth to start its decade-long extended mission. The major scope includes an engineering demonstration of long-term maintenance strategies for spacecraft and operation systems and scientific investigations during various mission phases. Major scientific investigations include spacecraft-based telescopic observations of exoplanets and zodiacal dust observations during the cruise phase, flyby observations of the near-Earth asteroid (98943) Torifune in 2026 July, and rendezvous observations of near-Earth asteroid 1998 KY26 in 2031. This study overviews Hayabusa2#’s flyby and the physical properties of Torifune. Although the flyby operation planning is still ongoing, the mission will attempt to fly by the target at a distance (from the asteroid’s center) of 1–10 km. The flyby speed is planned to be 5.25 km s −1 , while the encounter location is 0.81 au from the Sun. The mission plans to fix the spacecraft’s orientation during the flyby, only allowing for a very limited pointing change to attain higher-resolution imaging. The mission will attempt to obtain science and engineering returns during the flyby. The planned investigations will offer stronger insights into material transport mechanisms in the inner solar system and a demonstration of planetary defense technologies.
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ICARUS, 448, Apr, 2026
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METEORITICS & PLANETARY SCIENCE, Feb 23, 2026
Misc.
524-
日本惑星科学会誌 遊・星・人, 33(1) 34-50, 2024
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日本惑星科学会秋季講演会予稿集(Web), 2024, 2024
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日本地球惑星科学連合大会予稿集(Web), 2023, 2023
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日本地球惑星科学連合大会予稿集(Web), 2023, 2023
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日本地球惑星科学連合大会予稿集(Web), 2023, 2023
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銅と銅合金 : 銅及び銅合金技術研究会誌 = Copper and copper alloy : journal of Japan Research Institute for Advanced Copper-Base Materials and Technologies / 銅及び銅合金技術研究会 [編], 62(1) 1-5, 2023
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日本地球惑星科学連合大会予稿集(Web), 2023, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 66th, 2022
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宇宙科学技術連合講演会講演集(CD-ROM), 66th, 2022
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宇宙科学技術連合講演会講演集(CD-ROM), 66th, 2022
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宇宙航空研究開発機構研究開発報告 JAXA-RR-(Web), (21-008), 2022
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Bulletin of The Iron and Steel Institute of Japan, 26(7) 6-15, Jul, 2021 Peer-reviewedInvitedLead author
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Jan 22, 2021The asteroid exploration project "Hayabusa2" has successfully returned samples from the asteroid (162173) Ryugu. In this study, we measured the linear polarization degrees of Ryugu using four ground-based telescopes from 2020 September 27 to December 25, covering a wide-phase angle (Sun-target-observer's angle) range from 28$^\circ$ to 104$^\circ$. We found that the polarization degree of Ryugu reached 53$\%$ around a phase angle of 100$^\circ$, the highest value among all asteroids and comets thus far reported. The high polarization degree of Ryugu can be attributed to the scattering properties of its surface layers, in particular the relatively small contribution of multiply-scattered light. Our polarimetric results indicate that Ryugu's surface is covered with large grains. On the basis of a comparison with polarimetric measurements of pulverized meteorites, we can infer the presence of submillimeter-sized grains on the surface layer of Ryugu. We also conjecture that this size boundary represents the grains that compose the aggregate. It is likely that a very brittle structure has been lost in the recovered samples, although they may hold a record of its evolution. Our data will be invaluable for future experiments aimed at reproducing the surface structure of Ryugu.
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宇宙航空研究開発機構特別資料 JAXA-SP-(Web), (21-001), 2021
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日本地球惑星科学連合大会予稿集(Web), 2021, 2021
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日本地球惑星科学連合大会予稿集(Web), 2021, 2021
Books and Other Publications
19Presentations
52Teaching Experience
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Apr, 2019 - Present太陽と太陽系の科学 (放送大学)
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Apr, 2011 - Present位置天文学・天体力学 (東京大学)
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Apr, 2007 - Present宇宙科学 (玉川大学)
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Apr, 2006 - PresentSpace System Engineering 3 (The Graduate University for Advanced Studies)
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2006 - Present宇宙工学概論 (総合研究大学院大学)
Professional Memberships
3Research Projects
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科学研究費助成事業, 日本学術振興会, Apr, 2024 - Mar, 2027
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Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2023 - Mar, 2026
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2021
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), 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, 2003 - 2006