Hayabusa2 Project Team
Profile Information
- Affiliation
- Associate Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
- Degree
- Ph. D.(University of Tokyo)
- ORCID ID
https://orcid.org/0000-0003-2991-4159- J-GLOBAL ID
- 200901017841696830
- researchmap Member ID
- 5000019450
X線観測を中心に、飛翔体を用いた太陽物理学の研究を行なっています。
「ひので」、「ようこう」、SDOなどの衛星に搭載されたX線望遠鏡やEUV望遠鏡をはじめとする、飛翔体観測機器のデータを用いて、太陽フレアで発生するプラズマ粒子の爆発的な加熱と加速や、それらの惑星間空間への影響など、コロナ中のプラズマ活動現象の理解をめざします。
また、「ようこう」の硬X線望遠鏡HXTや「ひので」のX線望遠鏡XRTなど、新しい観測を可能とする装置開発を手がけており、現在は、将来の太陽高エネルギープラズマの研究に向けた、高空間分解能・低散乱性能を持つX線斜入射ミラーや、光子計測型の高速X線ピクセル検出器などの開発研究、および将来の飛翔体ミッションの検討を進めています。
I have been engaged in solar physics research with space and sub-orbital observations chiefly in X-ray wavelengths.
By use of data from instruments such as X-ray or EUV telescopes aboard Hinode, Yohkoh, and SDO, I aim to understand plasma activities in the solar corona, including explosive heating and acceleration of coronal plasmas during flares and their interplanetary consequences.
Meanwhile, I have participated in the development of instruments which make possible new observations of the solar corona; e.g., Hard X-ray Telescope (HXT) aboard Yohkoh and X-Ray Telescope (XRT) aboard Hinode. Currently, I am working on research and development of grazing-incidence X-ray mirrors (Wolter mirrors) of high spatial resolution/low scattering performance as well as photon-counting-type high-speed X-ray pixel detectors, together with studies on future space solar X-ray missions.
Research Interests
9Research Areas
3Committee Memberships
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Oct, 2025 - Present
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Jun, 2023 - Present
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Apr, 2016 - Present
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Apr, 2009 - Present
Awards
6Papers
126-
The Astrophysical Journal, 990(2) 200-200, Sep 9, 2025 Peer-reviewedAbstract We determine magnetic fields from the photosphere to the upper chromosphere combining data from the Hinode satellite and the CLASP2.1 sounding rocket experiment. CLASP2.1 provided polarization profiles of the Mg ii h and k lines, as well as of the Mn i lines around 2800 Å, across various magnetic structures in an active region, containing a plage, a pore, and the edges of a sunspot penumbra. By applying the weak-field approximation to the circular polarization profiles of these spectral lines, we obtain a longitudinal magnetic field map at three different heights in the chromosphere (lower, middle, and upper). This is complemented by data from Hinode (photospheric magnetic field), the Interface Region Imaging Spectrograph, and the Solar Dynamics Observatory (high spatial resolution observations of the chromosphere and corona). We quantify the height expansion of the plage magnetic fields and find that the magnetic fields expand significantly in the middle chromosphere, shaping the moss observed above in the transition region and corona. We identified an area with polarity reversal at the upper chromosphere around the edge of the pore, suggesting the presence of a magnetic discontinuity in the upper chromosphere. Transient and recurrent jetlike events are observed in this region, likely driven by magnetic reconnection. Around the penumbral edge, we find large-scale magnetic fields corresponding to the superpenumbral fibrils seen in the upper chromosphere. In the superpenumbral fibrils, we find Zeeman-induced linear polarization signals, suggesting the presence of a significantly inclined magnetic field, as strong as 1000 G in the upper chromosphere.
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Proc. SPIE, 13103 1310308 (16pp), Aug 27, 2024SPIE Astronomical Telescopes + Instrumentation, 2024 X-Ray, Optical, and Infrared Detectors for Astronomy XI
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Proc. SPIE, 13093 130936X (9pp)-264, Aug 21, 2024SPIE Astronomical Telescopes + Instrumentation, 2024 Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray
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Proc. SPIE, 13093 1309353 (6pp), Aug 21, 2024 Lead authorSPIE Astronomical Telescopes + Instrumentation, 2024 Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray
Misc.
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日本航空宇宙学会誌, 74(3) 29(95)-30(96), Mar, 2026 InvitedLead author
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日本航空宇宙学会誌, 73(3) 28(90)-28(90), Mar, 2025 InvitedLead author
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ISASニュース, 522 4-4, Sep, 2024 Peer-reviewedInvitedLead author
Books and Other Publications
3Presentations
211Teaching Experience
16-
Jan, 2026 - Jan, 2026物理科学・高エネルギー加速器科学におけるプロジェクト 「宇宙科学プロジェクトについて」 (The Graduate University for Advanced Studies)
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Nov, 2025 - Nov, 2025宇宙理学概論 (総合研究大学院大学・先端学術院・宇宙科学コース)
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Feb, 2025 - Feb, 2025物理科学・高エネルギー加速器科学におけるプロジェクト 「宇宙科学プロジェクトについて」 (The Graduate University for Advanced Studies)
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Apr, 2024 - Jul, 2024宇宙環境科学特論 (総合研究大学院大学・先端学術院・宇宙科学コース)
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Nov, 2023 - Nov, 2023宇宙理学概論 (総合研究大学院大学・先端学術院・宇宙科学コース)
Professional Memberships
11Works
1Research Projects
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戦略的基盤技術高度化支援事業, 経済産業省, Jun, 2021 - Mar, 2024
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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, 2015 - Mar, 2018
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2018
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S), Japan Society for the Promotion of Science, May, 2013 - Mar, 2018
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Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Japan Society for the Promotion of Science, Apr, 2012 - Mar, 2014
Academic Activities
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Planning, Management, etc., Review, evaluation, Peer reviewSPIE (Copenhagen, Denmark), Jul 5, 2026 - Jul 10, 2026
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Planning, Management, etc., Panel moderator, Session chair, etc.総研大 (核融合科学コース・宇宙科学コース・素粒子原子核コース) (JAXA筑波 / Online), Jan 19, 2026 - Jan 21, 2026
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Planning, Management, etc., Panel moderator, Session chair, etc.総研大 (核融合科学コース・宇宙科学コース・素粒子原子核コース) (オンライン), Feb 12, 2025 - Feb 14, 2025
Social Activities
55● 専任大学名
1-
Affiliation (university)総合研究大学院大学（SOKENDAI)
● 所属する所内委員会
1-
ISAS Committee放射線安全委員会
