Experimental astroparticle physics group, the University of Toyama

LINKS

• the Univ. of Toyama
• Y. Nakano's HP

ABOUT US

Our group conducts research to reveal the history of the universe and searches for physics beyond the Standard Model of particle physics through the observation of cosmic rays and elementary particles.
Follow @astropp_toyama Instagram: astropp_toyama

Our research was featured on television

November 18th (Tue) 富山大学広報番組『知のフロンティア～おもしろい富山大学～』
第23回 「大型実験Super-Kamiokande検出器による宇宙線の観測」（理学部）
Youtube (with English)

NEWS & TOPICS

• 2026-March-23 Kato and Nakano give an oral presentation at JPS Spring meeting 2026 held in online format.
• 2026-March-10 We held a seminar presented by Shinya Kanemura from the University of Osaka.
• 2026-March-07 Nakano gave a talk presentation at 第11回「極低放射能技術」研究会 held in Kobe university.
• 2026-March-06 Kato, Kiriyama, Futatsugi, and Nakano gave poster presentations at 第2回 学術変革「地下稀事象」若手研究会 held in Kobe university.
• 2026-March-02 Nakano gave an oral presentation at 第8回 空気シャワー観測による宇宙線の起源探索研究会 held in the ICRR, the university of Tokyo.
• 2026-February-27 Grant-in-Aid for Scientific Research (B) "背景事象の理解向上で実現する超新星背景ニュートリノの史上初観測" has been accepted. Nakano joins this project as a Co-Investigator.
• 2026-February-19 Grant in Aid for Transformative Research Areas (A) (Publicly Offered Research) "Nuclear reactions between Oxygen and muons for cosmic-ray muon polarization measurements with world-leading sensitivity" has been accepted. Nakano leads this project as the Principle Investigator.
• 2026-February-04 We held a seminar presented by Anatoli Fedynitch from Institute of Physics, Academia Sinica.
• 2025-February-04 A. Taketa from Earthquake Research Institute, H. Menjyo from Institute for Space-Earth Environmental Research, Anatoli Fedynitch and Stefan Frose from Institute of Physics, Academia Sinica stayed on February 4th for joint research.
• 2026-January-29 Nakano gave an oral presentation at 令和7年度 共同利用研究成果発表会 held in the ICRR, the university of Tokyo.
• 2026-January-08 R. Gaior from LPNHE Sorbonne Universit stayed on January 8th for joint research.
• 2025-December-26 Nakano gave a seminar at 素粒子宇宙物理研究室 held in Yokohama national university.
• 2025-December-24 One proposal of Postdoctoral Fellowships for Research in Japan (Standard Program) by Japan Society for the Promotion of Science (JSPS) was accepted. "Rejection and purification of radioactive impurities in water Cherenkov particle detectors"
• 2025-December-08 Paper about the measurement of isotope production rate through the muon capture process by the Super-Kamiokande detector led by Nakano has been published in Phys. Rev. C. "Measurement of the branching ratio of 16N, 15C, 12B, and 13B isotopes through the nuclear muon capture reaction in the Super-Kamiokande detector"
• 2025-December-05 Y. Takemoto from Kamioka observatory stayed on December 5th for joint research.
• 2025-December-04 We held a seminar presented by Kozo Fujisue from Institute of Physics, Academia Sinica.
• 2025-December-04 T. Tada and Y. Asano from Okayama university stayed on December 4th for joint research.
• 2025-December-04 K. Fujisue from Institute of Physics, Academia Sinica stayed from December 4th to 5th for joint research.
• 2025-December-03 Nakano received an award for outstanding teacher based on faculty performance evaluations.
• 2025-November-29 Kato, Kiriyama, Koyata, and Futatsugi gave talk presentations at The 2025 Annual Meeting of the Hokuriku Branch of JPS held in the University of Toyama.
• 2025-November-29 We held The 2025 Annual Meeting of the Hokuriku Branch of JPS at the university of Toyama.
• 2025-November-28 K. Saito from Tohoku university stayed on November 28th for joint research.
• 2025-November-18 Our group's researches was featured on television in 富山大学広報番組『知のフロンティア～おもしろい富山大学～』, 第23回 「大型実験Super-Kamiokande検出器による宇宙線の観測」（理学部). Youtube
• 2025-November-05 We held a seminar presented by Sho Sugama from Yokohama National University.
• 2025-November-04 S. Sugama from Yokohama National University stayed from November 4th to 7th for joint research.
• 2025-November-01 We held a face-to-face OSECHI group meeting at the university of Toyama.
• 2025-October-30 We held a face-to-face meeting for the COMET Japan group at the university of Toyama.
• 2025-October-24 Press release for Nature 646, 818-824 (2025). Detail can be found in 理学部のホームページ.
• 2025-October-22 Nakano gave a seminar at New Horizons QUP Seminar held in Yokohama national university.
• 2025-October-20 We held a seminar presented by Torsten Bringmann from University of Oslo.
• 2025-October-10 We held a seminar presented by N. Yokozaki from Zhejiang University.
• 2025-September-18 Nakano gave three talk presentations at II EU Workshop on Water Cherenkov Experiments for Precision Physics held in Jagiellonian Univeristy.
• 2025-September-09 Nakano gave a poster presentation at Workshop for the Global Cosmic Ray Observatory -- Challenging Next-Generation Multi-Messenger Astronomy with Interdisciplinary Research held in the university of Tokyo.
• 2025-August-26 Pre-print led by Nakano has been uploaded in arXiv. "Measurement of the branching ratio of 16N, 15C, 12B, and 13B isotopes through the nuclear muon capture reaction in the Super-Kamiokande detector"
• 2025-July-26 Nakano gave a poster presentation at the domestic workshop held in Niigata university.
• 2025-July-14 We held a seminar presented by M. Eto from Ymagata university.
• 2025-June-26 Nakano gave an oral presentation at 学術変革「地下稀事象」領域研究会 held in the university of Tokyo.
• 2025-June-23 We held a seminar presented by K. Mizukoshi from Tohoku university.
• 2025-May-20 Y. Takeuchi Kobe Okayama university stayed on May 20th for joint research.
• 2025-May-19 We held a seminar presented by Lukas Treuer from Sokendai.
• 2025-May-08 R. Shinodao from Kamioka observatory stayed on May 8th for joint research.
• 2025-April-21 We held a seminar presented by T. Nakamori from Yamagata university.
• 2025-April-11 Y. Koshio from Okayama university stayed on April 11th for joint research.
• 2025-April-10 R. Akutsu from KEK stayed on April 10th for joint research.
• 2025-April-01 One graduate school student and five undergraduate stutends newly join our group.
• 2025-March-24 We held two seminars presented by K. Funakubo from Saga University and M. Tachibana from Saga University.
• 2025-March-21 Nakano gave an oral presentation at Spring Meeting (The Physical Society of Japan) held in Hokkaido university.
• 2025-March-17 We held a seminar presented by Stefan Lederer from Tokyo University of Science.
• 2025-March-13 We held a seminar presented by S. Taniguchi from Osaka university.
• 2025-March-08 Nakano gave an oral presentation and an poster presentation at 第10回「極低放射能技術」研究会 held in the university of Toyama.
• 2025-March-07 We held a workshop, 第10回「極低放射能技術」研究会.
• 2025-March-06 We held a workshop, 第1回 学術変革「地下稀事象」若手研究会.
• 2025-February-17 We held a seminar presented by K. Hashino from National Institute of Technology, Fukushima College.
• 2025-February-13 We held a seminar presented by S. Mishima from Saitama Medical University.
• 2025-January-27 We held a seminar presented by N. Osamura from Nagoya University.
• 2025-January-17 The results of our industry-academia collaborative research have been accepted for publication in Prog. Theor. Exp. Phys. "Removal of Radioactive Noble Gas Radon from Air by Ag-Zeolite"
• 2025-January-16 Nakano gave an oral presentation at ミューオン核物理・核データ --基礎研究から応用研究へ held in RCNP in Osaka university.
• 2024-December-20 Nakano gave a seminar at 物理工学 談話会 held in Yokohama national university.
• 2024-November-30 Nakano gave an oral presentation at Annual Meeting of Hokuriku Branch of JPS (The Physical Society of Japan) held in Kanazawa university.
• 2024-November-25 The results of our industry-academia collaborative research have been accepted for publication in Prog. Theor. Exp. Phys. "Study of radon removal performance of silver-ion exchanged zeolite from air for underground experiments"
• 2024-November-25 We held two seminars presented by T. Asaka from Niigata University and T. Shimasaki from he university of Tokyo, Kavli IPMU.
• 2024-November-11 George Burton from King's College London stayed from November 11th to 14th for joint research.
• 2024-October-26 Paper about the measurement of charge ratio and polarization of cosmic-ray muons by the Super-Kamiokande detector led by Nakano has been published in Phys. Rev. D. "Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector"
• 2024-October-10 We held a seminar presented by T. Kuwahara from Peking University.
• 2024-October-03 We held a seminar presented by M. Fujiwara from Technical University of Munich.
• 2024-September-16 Nakano gave an oral presentation at 79th Annual Meeting (The Physical Society of Japan) held in Hokkaido university.
• 2024-July-05 Nakano gave an oral presentation at the domestic workshop held in Osaka university.
• 2024-July-01 Y. Maekawa from Keio University stayed from July 1st to 4th for joint research.
• 2024-July-01 J. Sato from Yokohama National University, T. Senami from Kyoto university, and M. Yamanaka from Hosei university stayed from July 1st to 2nd for joint research.
• 2024-June-29 Nakano gave an oral presentation at the domestic workshop held in the university of Toyama.
• 2024-June-28 Grant-in-Aid for Challenging Research (Pioneering) 24K21202 "フッ素を含む大質量暗黒物質直接探索実験への挑戦" has been accepted. Nakano joins this project as a Co-Investigator.
• 2024-June-21 Nakano gave a poster presentation at the Neutrino conference held in Milano, Italy.
• 2024-June-13 We held a seminar presented by K. Sakurai from Tohoku university.
• 2024-May-09 Nakano gave an oral presentation at the domestic workshop held in Osaka Metropolitan University.
• 2024-May-03 Paper about solar neutrino measurement by the Super-Kamiokande detector led by Nakano has been published in Phys. Rev. D. "Solar neutrino measurements using the full data period of Super-Kamiokande-IV"
• 2024-April-25 S. Fujita from IPMU and R. Shimamura from Yokohama National University stayed from April 23rd to 25th for joint research.
• 2024-April-01 Grant-in-Aid for Scientific Research (B) 24K00654 "Search for solar g-mode oscillation using solar neutrinos based on solar model construction and helioseismic theory" has been accepted. Nakano leads this project as the Principle Investigator.
• 2024-April-01 Grant-in-Aid for Scientific Research (A) 24H00231 "高解像度前置検出器とハイパーカミオカンデで実現するニュートリノ物理の新展開" has been accepted. Nakano joins this project as a Co-Investigator.
• 2024-April-01 Grant-in-Aid for Transformative Research Areas (A) 24H02243 "極低放射能技術の展開" has been accepted. Nakano joins this project as a Co-Investigator.
• 2024-April-01 This group was newly established.