Hiroyuki CHIHARA

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

70273068

Homepage URL

https://fiomfd.github.io/

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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Education   Elementary and Secondary School Teacher Training Program   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Mathematical Sciences   Professor  

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University 【 display / non-display 】

  • 1983.04
    -
    1990.03

    Kyoto University     Graduated

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Graduate School 【 display / non-display 】

  • 1990.04
    -
    1992.03

    Kyoto University    Master's Course  Completed

  • 1992.04
    -
    1995.03

    Kyoto University    Doctor's Course (second term)  Accomplished credits for doctoral program

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Study abroad experiences 【 display / non-display 】

  • 2000.09
    -
    2001.09

    Visiting Scholar, University of Chicago  

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Academic degree 【 display / non-display 】

  • Kyoto University -  Doctor of Engineering

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External Career 【 display / non-display 】

  • 2016.04
    　
    　

    Professor, University of the Ryukyus  

  • 2014.04
    -
    2016.03

    Professor, University of Tsukuba  

  • 2009.10
    -
    2014.03

    Professor, Kagoshima University  

  • 2007.04
    -
    2009.09

    Associate Professor, Tohoku University  

  • 2000.04
    -
    2007.09

    Associate Professor, Tohoku University  

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Affiliated academic organizations 【 display / non-display 】

  • 2001.01
    -
    Now
     

    the American Mathematical Society 

  • 2019.10
    -
    Now
     

    Society for Industrial and Applied Mathematics 

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Research Interests 【 display / non-display 】

  • microlocal analysis

  • Fourier integral operators

  • Pseudodifferential Operators

  • X-ray transform

  • Radon transform

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Research Areas 【 display / non-display 】

  • Natural Science / Mathematical analysis

  • Natural Science / Basic analysis

  • Humanities & Social Sciences / Science education

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Research Theme 【 display / non-display 】

  • Microlocal Analysis of Integral Geometry (2020-)

  • Learning Applied Harmonic Analysis (2026-)

  • Modernizing and visualizing university-level mathematics lectures (2025-)

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Published Papers 【 display / non-display 】

  • Geodesic X-ray transform and streaking artifacts on simple surfaces or on spaces of constant curvature

    Hiroyuki Chihara

    Vietnam Journal of Mathematics     2026.06 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • The matrix weighted real-analytic double fibration transforms

    Hiroyuki Chihara, Shubhan R. Jathar, and Jesse Railo

    Annales Fennici Mathematici   51 ( 1 ) 353 - 376   2026.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    • Access this article
      DOI

  • Microlocal analysis of double fibration transforms with conjugate points

    Hiroyuki Chihara

    Journal of Geometric Analysis   36   ID 68 - 22 pages   2026.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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  • Microlocal analysis of d-plane transform on the Euclidean space

    H. Chihara

    SIAM Journal on Mathematical Analysis ( Society for Industrial and Applied Mathematics )  54 ( 6 ) 6254 - 6287   2022.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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  • Bargmann transform on the space of hyperplanes

    H. Chihara

    Journal of Fourier Aanalysis and Applications ( Springer International Publishing )  28 ( 5 ) No.72 - 21 pages   2022.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    • Access this article
      DOI

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Other Papers 【 display / non-display 】

  • Explicit formulas for the Jordan normal forms and matrix exponentials of 2 × 2 matrices

    Hiroyuki Chihara

    Zenodo     2026.04

     

    DOI

  • Seismic intensity and typhoon categories: the need for quantitative clarity in Japanese disaster communication

    Hiroyuki Chihara

    Zenodo ( Zenodo )    2026.03

     

    DOI

  • Smoothing effects of dispersive pseudodifferential equations

    Hiroyuki Chihara

    Report, Mathematisches Forschungsinstitut Oberwolfach ( Mathematisches Forschungsinstitut Oberwolfach )  20   2 - 3   2002.12  [Refereed]

     

  • The initial value problem for semilinear Schrödinger equations

    Hiroyuki Chihara

    GAKUTO International Series, Mathematical Sciences and Applications ( Gakko Tosho Co., Ltd )  10   19 - 24   1997.07  [Refereed]

     

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Presentations 【 display / non-display 】

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Work 【 display / non-display 】

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Other Research Activities 【 display / non-display 】

  • MEXT Fellowship for Research Abroad

    Foreign researchers etc. 

    2000.09
    -
    2001.09

    　View Summary

    I was employed as a fellow for research abroad by Ministry of Education, Culture, Sports, Science and Technology: MEXT, and I stayed at Department of Mathematics, University of Chicago as a visiting scholar for one year.

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Academic Awards 【 display / non-display 】

  • 2014 Awarded Reviewer of JSPS Grants-in-Aid for Scientific Research

    2014.10.31   Japan Society for the Promotion of Science  

    Winner: Hiroyuki Chihara

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Microlocal Analysis in Integral Geometry

    Grant-in-Aid for Scientific Research(C)

    Project Year: 2023.04  -  2026.03 

    Investigator(s): Hiroyuki Chihara 

    Direct: 3,700,000 (YEN)  Overheads: 1,110,000 (YEN)  Total: 4,810,000 (YEN)

  • New Development of Geometric and Microlocal Analysis

    Grant-in-Aid for Scientific Research(C)

    Project Year: 2019.04  -  2022.03 

    Investigator(s): Hiroyuki Chihara 

    Direct: 3,300,000 (YEN)  Overheads: 990,000 (YEN)  Total: 4,290,000 (YEN)

  • Developments of Geometric and Microlocal Analysis

    Grant-in-Aid for Scientific Research(C)

    Project Year: 2016.04  -  2019.03 

    Investigator(s): Hiroyuki CHIHARA 

    Direct: 3,600,000 (YEN)  Overheads: 1,080,000 (YEN)  Total: 4,680,000 (YEN)

  • Pseudodifferential Operators and Geometric Analysis

    Grant-in-Aid for Scientific Research(B)

    Project Year: 2011.04  -  2015.03 

    Investigator(s): Hiroyuki CHIHARA  Member: Kimio MIYAJIMA, Tomoyuki KAKEHI, Monoru ITOH, Eiji ONODERA and Koichi KAIZUKA

    Direct: 14,000,000 (YEN)  Overheads: 4,200,000 (YEN)  Total: 18,200,000 (YEN)

  • Pseudodifferential Operators and Geometric Analysis

    Grant-in-Aid for Scientific Research(C)

    Project Year: 2008.04  -  2011.03 

    Investigator(s): Hiroyuki CHIHARA 

    Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

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Joint Research activities 【 display / non-display 】

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