Curriculum Vitaes
Profile Information
- Affiliation
- Associate Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration AgencyGraduate School of Science, Department of Chemistry, The University of Tokyo
- Degree
- Ph.D.(Mar, 1996, University of Tokyo)
- Researcher number
- 30321566
- J-GLOBAL ID
- 201501026547105146
- researchmap Member ID
- B000243484
- External link
専門は惑星科学、惑星物理学、惑星物質・物性科学、惑星探査科学。特に熱赤外カメラを用いた史上初の小惑星探査により、惑星探査に「熱撮像」の手法を世界で初めて導入に成功し、さらに「太陽系物性科学」の分野を創設。観測機器の開発による惑星探査でのその場観測とサンプルリターンによる帰還試料分析を主な研究手法とする。
主要な開発機器は、蛍光Ｘ線分光計、熱赤外カメラ、多波長熱赤外カメラである。また開発中のものはマルチターン飛行時間型質量分析計等である。地上分析においてはハイパースペクトル顕微鏡（フランスIAFとの共同）やロックインサーモグラフィ法による熱拡散率顕微鏡（石崎拓也氏と共同）による帰還試料の分析の他、将来の資料熱物性分析のための多色熱赤外顕微鏡の開発を推進中である。
◆国内外の惑星探査計画（観測機器担当）
・月探査「Lunar-A」 光学カメラLIC（Co-I）1993-2005
・火星探査「のぞみ」 HFレーダ高度計PWS/ALT（Co-I）1994-2003、可視カメラMIC（Co-I）1995-2003
・小惑星探査「はやぶさ」 蛍光エックス線分光計XRS担当（PI）1995-2010
・月周回探査「かぐや（SELENE）」 蛍光Ｘ線分光計XRS担当（PI）1998-2009
・小惑星探査「はやぶさ２」 中間赤外カメラTIR担当（PI）2010-present.、
・小惑星探査「はやぶさ２」 小型ランダーMASCOT担当（JAXAリエゾン）2010-2019
・小惑星探査「はやぶさ２」 デジタルエレキDE担当（PI）2010-present
・小惑星探査「はやぶさ２」 ハイパースペクトル顕微鏡MicrOmega担当（Co-PI）2019-present
・二重小惑星探査計画Hera 熱赤外カメラTIRI担当（PI）2020-present
・二重小惑星探査計画Hera Hera Investigation Team メンバ（招聘）2020-present
・地球近傍遭遇小惑星探査計画RAMSES 熱赤外カメラTIRI担当（PI）2025-present
◆帰還サンプルの分析（地上分析）
・JAXAキュレーションセンター（地球外物質研究グループ所属）2009-present
・ハイパースペクトル顕微鏡MicrOmega-CF（Co-PI）
・熱赤外顕微鏡（PI）
◆海外ミッション参画
・SMART-1 D-CIXS（Co-I）2000-2005
・Chandrayaan-1 C1XS（Co-I）2006-2009
・BepiColombo MIXS（Co-I）2003-present、SIXS （Co-I）2003-present
・Hera (-JP) Proejct Manager & TIRI（PI）2020-present、Investigation Team 2020-present
◆WG参画
・ESA MarcoPolo（=Hayabusa-MkII）においてX線分光、熱積外カメラ、着陸機
・月着陸機SELENE-B、SELENE-II
・月着陸SLIM（科学システム検討担当）
・火星探査MELOS（科学システム検討担当（固体惑星）、着陸探査）
・OKEANOS （科学システム検討担当、質量分析計HRMSの開発）
・月縦孔探査Uzume（科学システム検討担当、熱赤外カメラの開発）
・次世代小天体サンプルリターン理学WG（代表）
Research Interests
32Research Areas
1Research History
7-
Sep, 2006 - Present
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Oct, 2003 - Aug, 2006
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Feb, 1999 - Sep, 2003
Education
4Committee Memberships
3-
Aug, 2012 - Aug, 2013
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Aug, 2010 - Aug, 2012
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Aug, 2009 - Aug, 2010
Awards
24-
Dec, 2020
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Nov, 2020
Papers
258-
Nature Communications, Nov 4, 2025
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Meteoritics & Planetary Science, Nov 25, 2024Abstract Nucleosynthetic isotope variations are powerful tracers to determine genetic relationships between meteorites and planetary bodies. They can help to link material collected by space missions to known meteorite groups. The Hayabusa 2 mission returned samples from the Cb‐type asteroid (162173) Ryugu. The mineralogical, chemical, and isotopic characteristics of these samples show strong similarities to carbonaceous chondrites and in particular CI chondrites. The nucleosynthetic isotope compositions of Ryugu overlap with CI chondrites for several elements (e.g., Cr, Ti, Fe, and Zn). In contrast to these isotopes, which are of predominately supernovae origin, s‐process variations in Mo isotope data are similar to those of carbonaceous chondrites, but even more s‐process depleted. To further constrain the origin of this depletion and test whether this signature is also present for other s‐process elements, we report Zr isotope compositions for three bulk Ryugu samples (A0106, A0106‐A0107, C0108) collected from the Hayabusa 2 mission. The data are complemented with that of terrestrial rock reference materials, eucrites, and carbonaceous chondrites. The Ryugu samples are characterized by distinct 96Zr enrichment relative to Earth, indicative of a s‐process depletion. Such depletion is also observed for carbonaceous chondrites and eucrites, in line with previous Zr isotope work, but it is more extreme in Ryugu, as observed for Mo isotopes. Since s‐process Zr and Mo are coupled in mainstream SiC grains, these distinct s‐process variations might be due to SiC grain depletion in the analyzed materials, potentially caused by incomplete sample digestion, because the Ryugu samples were dissolved on a hotplate only to avoid high blank levels for other elements (e.g., Cr). However, local depletion of SiC grains cannot be excluded. An alternative, equally possible scenario is that aqueous alteration redistributed anomalous, s‐process‐depleted, Zr on a local scale, for example, into Ca‐phosphates or phyllosilicates.
Misc.
536-
BUNSEKI KAGAKU, 61(4) 299-310, Apr 5, 2012
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Machining Characteristics of Rock by Wire-sawing in Vacuum (4th Report):Measurement of Cutting PowerProceedings of JSPE Semestrial Meeting, 2012 395-396, 2012It is expected for wire-sawing to keep cutting performance by successive supply of cutting edges. The performance of wire-sawing in vacuum has been investigated for lunar and planetary explorations. In this report, cutting power was measured in vacuum. An octagonal load cell with strain gauges was mounted under the workpiece holder to measure the principal and normal forces simultaneously. The normal force was applied with a constant load spring. The wire speed was varied from 0.3 to 1.0 m/s. The principal force in vacuum was slightly larger than that in air and was constant in the measured range. Consequently, the cutting power was proportional to the wire speed.
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Proceedings of JSPE Semestrial Meeting, 2012 787-788, 2012It is expected for wire-sawing to keep cutting performance due to successive supply of cutting edges in vacuum. Because the nickel bond of the saw wire is softer than basalt, the nickel was shaved and adhered onto basalt. The diamond grits on the saw wire slips on it. Although the machining amount was decreased with a decrease of the vacuum pressure, the tool wear of both bare and nickel-coated saw wires was almost constant. Consequently, the grinding ratio, which is the ratio of the machining amount to the wear, was small at high vacuum. The dispersion of carbon from diamond into nickel caused the tool wear.
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Proceedings of the International Astronautical Congress, IAC, 3 1642-1653, 2012
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2011 124, Oct 23, 2011
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Abstracts of 8th Annual General Meeting of Asia Oceania Geosciences Society (AOGS 2011), PS08-03-A006, Aug, 2011 Peer-reviewed
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METEORITICS & PLANETARY SCIENCE, 46 A175-A175, Jul, 2011
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METEORITICS & PLANETARY SCIENCE, 46 A172-A172, Jul, 2011
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METEORITICS & PLANETARY SCIENCE, 46 A171-A171, Jul, 2011
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METEORITICS & PLANETARY SCIENCE, 46 A257-A257, Jul, 2011
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METEORITICS & PLANETARY SCIENCE, 46 A178-A178, Jul, 2011
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Proceedings of Japan Geoscience Union Meeting 2011, PPS002-13, May, 2011
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The Proceedings of the Space Engineering Conference, 2010 _G3-1_-_G3-5_, 2011In future lunar, planetary or asteroid explorations, in-situ analysis of rock samples are strongly demanded to obtain many data from various aspects. For precise composition analysis, a sample surface should be smoothed. In this report, a surface shaver with a piezoelectric actuator is proposed and its machining performance in air is investigated. Shaving teeth are mounted at the ends of a lever mechanism. The device is pressed through four springs onto the specimen with a linear actuator. When a sinusoidal voltage of 50 Vp-p and an offset voltage of 25 V ware applied, the natural frequency was 556 Hz and the unloaded amplitude of shaving teeth were 0.77 mmp-p. Basalt samples were machined for 10 minutes in air. The surface roughness was small with an increase of the pressing force. However, the removal amount was smaller with an increase of the pressing force further. The surface roughness varied widely not only due to removal amount but also due to pores.
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Digests of 11th Space Science Symposium, Jan, 2011
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Digests of 11th Space Science Symposium, S3-18, Jan, 2011
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Annual Meeting of the Geological Society of Japan, 118th 2-2, 2011
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Abstracts of 7th Annual General Meeting of Asia Oceania Geosciences Society (AOGS 2010), PS05-A023, Jul, 2010 Peer-reviewed
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Proceedings of Japan Geoscience Union Meeting 2010, PPS005-P09, May, 2010
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宇宙航空研究開発機構特別資料 JAXA-SP-, (09-016), 2010
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The proceedings of the JSME annual meeting, 2010 343-344, 2010This report deals with a rock-crasher embedded in the science integrated package for future lunar exploration. The crusher measures 59×60×129 mm and weighs 490 g. The generative impact force and consumption power were 150 N and 6 W at a voltage of 24 Vp-p and a driving frequency of 50 Hz device. A tool bit with pyramids driven with a solenoid was made from tungsten carbide. Hard basalt, granite and anorthosite were smoothed.
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Digests of 10th Space Science Symposium, S2-17, Jan, 2010
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Digests of 10th Space Science Symposium, P2-111, Jan, 2010
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太陽系科学シンポジウム講演集録(CD-ROM), 32nd ROMBUNNO.12GATSU21NICHI,3, 2010
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Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 2009 113, Sep 28, 2009In the Hayabusa-2 pre-project, science case and onboard instruments are studied to conduct in situ observation at the surface of NEO 1999JU3, with a candidate 10kg class small lander. Science requirements, strawman payloads, and operation scenario will be briefly described at the meeting.
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Abstracts of 6th Annual General Meeting of Asia Oceania Geosciences Society (AOGS 2009), PS08-A029, Aug, 2009 Peer-reviewed
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Proceedings of 27th International Symposium on Space Technology and Science (ISTS 2009), 2009-k-22, Jul, 2009 Peer-reviewed
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Proceedings of Japan Geoscience Union Meeting 2009, P142-P013, May, 2009
Presentations
522Teaching Experience
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Apr, 2021 - PresentInorganic and Analytical Chemistry (University of Tokyo, Graduate School of Science, Department of Chemistry)
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Apr, 2011 - PresentAdvanced Analytical Chemistry IV (University of Tokyo, Graduate School of Science, Department of Chemistry)
Professional Memberships
5Research Projects
6-
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Japan Society for the Promotion of Science, Jun, 2017 - Mar, 2022
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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, 2014 - Mar, 2019
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, 2010 - 2012
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科学研究費助成事業 若手研究(A), 日本学術振興会, 2005 - 2007
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, 2002 - 2003
● 専任大学名
1-
Affiliation (university)東京大学（University of Tokyo)
● 所属する所内委員会
1-
ISAS Committee放射線安全委員会
