Masayoshi Kozai

Profile Information

Affiliation: Project researcher, Joint Support-Center for Data Science Research, Polar Environment Data Science Center, Research Organization of Information and Systems
: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency

Degree: 博士（理学）(Mar, 2016, 信州大学)

J-GLOBAL ID: 201901017116726616
researchmap Member ID: B000376637

Research Areas

Research History

Jul, 2021 - Present

Project researcher, Joint Support-Center for Data Science Research, Polar Environment Data Science Center, Research Organization of Information and Systems
Apr, 2021 - Present

Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Apr, 2021 - Jun, 2021

Tokyo University of Technology
Apr, 2019 - Mar, 2021

宇宙航空プロジェクト研究員, 学際科学研究系, 宇宙航空研究開発機構宇宙科学研究所
Apr, 2016 - Mar, 2019

研究開発員, 大気球実験グループ, 宇宙航空研究開発機構宇宙科学研究所
Apr, 2012 - Dec, 2012

設計課, カネテック株式会社

Education

Apr, 2013 - Mar, 2016

物質創成科学専攻, 大学院総合工学系研究科（博士課程）, 信州大学
Apr, 2010 - Mar, 2012

Shinshu University
Apr, 2006 - Mar, 2010

Faculty of Science, Shinshu University
Apr, 2003 - Mar, 2006

奈良県立奈良高等学校

Committee Memberships

Jan, 2023 - Present

Local Organizing Committee, International Symposium on Data Science 2023
Jan, 2023 - Present

データ問題検討分科会世話人, SGEPSS
Jul, 2022 - Mar, 2023

ROIS クロストーク企画委員

Awards

May, 2015

JpGU Outstanding Student Presentation Award

Kozai Masayoshi

Papers

Observation of Gamma Rays up to 320 TeV from the Middle-aged TeV Pulsar Wind Nebula HESS J1849−000

M. Amenomori, S. Asano, Y. W. Bao, X. J. Bi, D. Chen, T. L. Chen, W. Y. Chen, Xu Chen, Y. Chen, Cirennima …

The Astrophysical Journal, 954(2) 200-200, Sep 1, 2023 Peer-reviewed
Rigidity dependence of long-term cosmic ray variation

Chihiro Kato, Kazuoki Munakata, Ryuho Kataoka, Shoko Miyake, Masayoshi Kozai, Yuki Hayashi, Yoshiki Masuda, Mizuki Matsumoto

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), Aug 18, 2023
The GAPS Time-of-Flight Detector

Sydney Nicole Feldman, T. Aramaki, M. Boezio, S.E. Boggs, V. Bonvicini, G. Bridges, D. Campana, W.W. Craig, P. von Doetinchem, E. Everson …

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), Aug 9, 2023
Data mining of cosmic-ray anisotropy observed with the Global Muon Detector Network

Masayoshi Kozai, Y. Hayashi, C. Kato, K. Munakata, Y. Masuda, K. Iwai, M. Rockenbach, A. Dal Lago, R. R. S. Mendonca, E. Echer …

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023), Jul 25, 2023 Lead author
New Particle Identification Approach with Convolutional Neural Networks in GAPS

Masahiro YAMATANI, Yusuke NAKAGAMI, Hideyuki FUKE, Akiko KAWACHI, Masayoshi KOZAI, Yuki SHIMIZU, Tetsuya YOSHIDA

Journal of Evolving Space Activities, 1 n/a, Apr, 2023 Peer-reviewed
Thermal Control System to Easily Cool the GAPS Balloon-borne Instrument on the Ground

FUKE Hideyuki, OKAZAKI Shun, KAWACHI Akiko, KOBAYASHI Shohei, KOZAI Masayoshi, OGAWA Hiroyuki, SAIJO Masaru, TAKEUCHI Shuto, TOKUNAGA Kakeru

Journal of Evolving Space Activities, 1 n/a, 2023
Local environmental effects on cosmic ray observations at Syowa Station in the Antarctic: PARMA-based snow cover correction for neutrons and machine learning approach for neutrons and muons

Ryuho Kataoka, Tatsuhiko Sato, Chihiro Kato, Akira Kadokura, Masayoshi Kozai, Shoko Miyake, Kiyoka Murase, Lihito Yoshida, Yoshihiro Tomikawa, Kazuoki Munakata

Journal of Space Weather and Space Climate, 12(37) 37-37, Nov, 2022 Peer-reviewed
Large-amplitude Bidirectional Anisotropy of Cosmic-Ray Intensity Observed with Worldwide Networks of Ground-based Neutron Monitors and Muon Detectors in 2021 November

K. Munakata, M. Kozai, C. Kato, Y. Hayashi, R. Kataoka, A. Kadokura, M. Tokumaru, R. R. S. Mendonça, E. Echer, A. Dal Lago …

The Astrophysical Journal, 938(1) 30-30, Oct 12, 2022 Peer-reviewed
Sensitivity of the GAPS experiment to low-energy cosmic-ray antiprotons

F. Rogers, T. Aramaki, M. Boezio, S.E. Boggs, V. Bonvicini, G. Bridges, D. Campana, W.W. Craig, P. von Doetinchem, E. Everson …

Astroparticle Physics, 145 102791-102791, Oct, 2022 Peer-reviewed
Statistical investigation of the large-area Si(Li) detectors mass-produced for the GAPS experiment

M. Kozai, K. Tokunaga, H. Fuke, M. Yamada, C.J. Hailey, C. Kato, D. Kraych, M. Law, E. Martinez, K. Munakata …

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1034 166820-166820, Jul, 2022 Peer-reviewedLead author
The GAPS Instrument: A Large Area Time of Flight and High Resolution Exotic Atom Spectrometer for Cosmic Antinuclei

S. Quinn, T. Aramaki, R. Bird, M. Boezio, S. E. Boggs, V. Bonvicini, D. Campana, W. W. Craig, E. Everson, L. Fabris …

Proceedings of Science, 395, Mar 18, 2022
Searching for cosmic antihelium nuclei with the GAPS experiment

A. Stoessl, T. Aramaki, R. Bird, M. Boezio, S. E. Boggs, V. Bonvicini, D. Campana, W. W. Craig, E. Everson, L. Fabris …

Proceedings of Science, 395, Mar 18, 2022
Cosmic Antiproton Sensitivity for the GAPS Experiment

Field Rogers, T. Aramaki, R. Bird, M. Boezio, S. E. Boggs, V. Bonvicini, D. Campana, W. W. Craig, E. Everson, L. Fabris …

Proceedings of Science, 395, Mar 18, 2022
In Search of Cosmic-Ray Antinuclei from Dark Matter with the GAPS Experiment

Mengjiao Xiao, T. Aramaki, R. Bird, M. Boezio, S. E. Boggs, V. Bonvicini, D. Campana, W. W. Craig, E. Everson, L. Fabris …

Proceedings of Science, 395, Mar 18, 2022
Reconstruction of antinucleus-annihilation events in the GAPS experiment

T. Aramaki, R. Bird, M. Boezio, S. E. Boggs, V. Bonvicini, D. Campana, W. W. Craig, E. Everson, L. Fabris, H. Fuke …

Proceedings of Science, 395, Mar 18, 2022
Neural Networks approach to event reconstruction for the GAPS experiment

N. Marcelli, T. Aramaki, R. Bird, M. Boezio, S. E. Boggs, V. Bonvicini, D. Campana, W. W. Craig, E. Everson, L. Fabris …

Proceedings of Science, 395, Mar 18, 2022
Potential and Application of Large-area Si(Li) Detectors developed for the GAPS Project

Hideyuki Fuke, Yuki Shimizu, Masayoshi Kozai, Field Rogers, Kerstin Perez, Charles J. Hailey

2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), Oct 16, 2021
Analysis of Mass-production Data of the GAPS Si(Li) Detectors using Data-mining Methods

M. Kozai, K. Tokunaga, H. Fuke, T. Erjavec, C.J. Hailey, C. Kato, N. Madden, K. Munakata, K. Perez, F. Rogers …

2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), Oct 16, 2021 Lead author
Gamma-Ray Observation of the Cygnus Region in the 100-TeV Energy Region

M. Amenomori, Y. W. Bao, X. J. Bi, D. Chen, T. L. Chen, W. Y. Chen, Xu Chen, Y. Chen, Cirennima, S. W. Cui …

Physical Review Letters, 127(3), Jul 16, 2021 Peer-reviewed
The anisotropy of cosmic rays observed by the Tibet air shower array and muon detector array

M. Amenomori, Y. W. Bao, X. J. Bi, D. Chen, T. L. Chen, W. Y. Chen, Xu Chen, Y. Chen, Cirennima, S. W. Cui …

Proceedings of Science, 358, Jul 2, 2021

Presentations

Rigidity spectrum of cosmic-ray anisotropy observed by ground-based muon detectors

M. Kozai, A. Kadokura, K. Munakata, C. Kato, Y. Hayashi, R. Kataoka, S. Miyake

The Physical Society of Japan 2024 Spring Meeting, Mar 19, 2024
Global Muon Detector Network (GMDN) and its application to the space weather study

Masayoshi Kozai

2nd International Workshop on Applications of Cosmic Ray Measurements, Mar 11, 2024 Invited
宇宙線異方性の包括的理解へ向けた教師なし学習の試行

小財正義

太陽圏宇宙線プラズマ合同研究集会, Mar 7, 2024
PEDSCでの宇宙線に関する研究

小財正義

第４回ROIS-DS成果報告会, Feb 29, 2024
統合データベース（AMIDER）の紹介

小財正義

極域データサイエンス研究集会 II, Feb 26, 2024
ガウス過程とマッチング問題の数理を活用した宇宙線物理量の推定

小財正義, 藤井海斗

宇宙地球環境の理解に向けての統計数理的アプローチ, Feb 15, 2024
AMIDER project for open science in polar research

Masayoshi Kozai

The 57th meeting of the Asia Pacific Advanced Network, Jan 30, 2024 Invited
Progress of the AMIDER project

Masayoshi Kozai, Yoshimasa Tanaka, Shuji Abe, Yasuyuki Minamiyama, Atsuki Shinbori

International Symposium on Data Science 2023, Dec 15, 2023
AMIDER as an Integrated Publication System for Research Data

Masayoshi Kozai, Yoshimasa Tanaka, Shuji Abe, Yasuyuki Minamiyama, Atsuki Shinbori

The 14th Symposium on Polar Science, Nov 15, 2023
分野横断型データベースAMIDERの活用による次世代型データ利活用スキームの構築

小財正義, 田中良昌, 新堀淳樹, 阿部修司

研究データエコシステム構築事業シンポジウム, Sep 29, 2023
Current status of the cross-disciplinary data catalog AMIDER

Masayoshi Kozai, Yoshimasa Tanaka, Shuji Abe, Yasuyuki Minamiyama, Atsuki Shinbori

SGEPSS2023, Sep 27, 2023 Invited
Activities for the construction of cosmic-ray data publication and analysis environment

Masayoshi Kozai, Yuki Hayashi, Chihiro Kato, Kazuoki Munakata, Yoshimasa Tanaka, Yasuyuki Minamiyama

SGEPSS2023, Sep 25, 2023
Conceptual research for a cosmic-ray muon observation in Iceland

M. Kozai, A. Kadokura, R. Kataoka, C. Kato, K. Munakata, S. Miyake, H. Sakurai

The Physical Meeting of Japan 2023 Annual Meeting, Sep 16, 2023
Data mining of cosmic-ray anisotropy observed with the Global Muon Detector Network

Masayoshi Kozai, Y. Hayashi, C. Kato, K. Munakata, Y. Masuda, K. Iwai, M. Rockenbach, A. Dal Lago, R. R. S. Mendonca, E. Echer, J. V. Bageston, C. R. Braga, H. K. Al Jassar, M. M. Sharma, M. L. Duldig, J. E. Humble, A. Kadokura, R. Kataoka, S. Miyake, I. Sabbah, P.-S. Mangeard, T. Kuwabara, P. Evenson

38th International Cosmic Ray Conference, Jul 29, 2023
AMIDER: Cross-disciplinary data catalog for polar science

Japan Open Science Summit 2023, Jun 21, 2023
Cross-disciplinary data publication platform AMIDER

Masayoshi Kozai, Yoshimasa Tanaka, Shuji Abe, Yasuyuki Minamiyama, Atsuki Shinbori

JpGU 2023, May 24, 2023
Data mining of cosmic-ray variation observed with the Global Muon Detector Network

Masayoshi Kozai, Yuki Hayashi, Chihiro Kato, Kazuoki Munakata, Akira Kadokura, Ryuho Kataoka, Shoko Miyake

JpGU 2023, May 22, 2023
Promoting the use of cosmic-ray data utilizing data-science platforms

M. Kozai, Y. Tanaka, C. Kato, K. Munakata

Mar 23, 2023
南北異方性を用いた宇宙線モジュレーションの研究

小財正義

2022年度ISEE研究集会「太陽地球環境と宇宙線モジュレーション」, Mar 1, 2023
極域統合データプラットフォーム（AMIDER）

小財正義

極域データサイエンスに関する研究集会, Feb 20, 2023

Professional Memberships

Jul, 2023 - Present

American Geophysical Union
Sep, 2021 - Present

SGEPSS
2016 - Present

宇宙理学メンバ
2016 - Present

日本物理学会
2015 - Present

日本地球惑星科学連合
宇宙線研究者会議

Research Projects

Study on north-south conjugacy of high energy particle precipitation from space

Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), Japan Society for the Promotion of Science, Oct, 2022 - Mar, 2028
自然科学と情報学の連携研究で目指す研究データ流通サイクルの活性化

科学研究費助成事業, 基盤研究(C), 日本学術振興会, Apr, 2024 - Mar, 2027

小財正義, 南山泰之, 阿部修司, 甲斐尚人, 新原俊樹
データサイエンス時代へ向けた新たな宇宙線観測・解析スキームの構築

Jun, 2022 - Mar, 2025

Masayoshi Kozai
分野横断型データベースAMIDERの活用による次世代型データ利活用スキームの構築

National Institute of Informatics, Dec, 2022 - Mar, 2024

Masayoshi Kozai, Yoshimasa Tanaka, Atsuki Shinbori
低エネルギー宇宙線反陽子の高感度観測による太陽変調研究

科学研究費助成事業若手研究, 若手研究, 日本学術振興会, Apr, 2020 - Mar, 2023

小財正義
データサイエンス時代へ向けた新たな宇宙線観測・解析スキームの構築

ROIS, Oct, 2022 - Mar, 2023

Masayoshi Kozai
The GAPS Instrument to Search for Low-Energy Cosmic Antinuclei as a Dark Matter Signature

日本学術振興会卓越研究員事業若手国際学会発表助成, 宇宙航空研究開発機構, Feb, 2021

小財正義
Study of a high-performance silicon detector with large sensitive area to search for cosmic-ray antiparticles

Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

Kozai Masayoshi
Development of Large-area Lithium-drifted Silicon Detectors for the GAPS Experiment

国際学会出席旅費支援, 宇宙科学振興会, 2018 - 2018

小財正義

Academic Activities

International Symposium on Data Science 2023

Planning, management, etc.

Jan, 2023 - Present
JpGU2023 Outstanding Student Presentation Award

Review, evaluation

May 21, 2023 - May 26, 2023
JpGU 2023

Panel moderator, session chair, etc.

May 21, 2023 - May 26, 2023
Materials Science in Semiconductor Processing

Peer review

2023
Advances in Space Research

Peer review

2023
Advances in Space Research

Peer review

2023
Physical Review D

Peer review

2023
Advances in Space Research

Peer review

2023
第152回地球電磁気・地球惑星圏学会講演会

Panel moderator, session chair, etc.

Nov 7, 2022
Astrophysical Journal

Peer review

2022
極域データの保全・公開と利活用に関する研究集会‐II

Panel moderator, session chair, etc.

Oct 12, 2021
Journal of Geophysical Research

Peer review

2021
Advances in Space Research

Peer review

2020
Journal of Space Weather and Space Climate

Peer review

2020
日本物理学会 2018年秋季大会

Panel moderator, session chair, etc.

Sep 14, 2018

Social Activities

宇宙天気予報について

Lecturer

北海道大樹町, 地域人材等を活用した講演会, Jun 28, 2017 - Jun 28, 2017

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