Organization
| Applied Research Laboratory Director | NAMITO Yoshihito | |
| Radiation Science Center Head | SANAMI Toshiya | Professor |
| Computing Research Center Head | NAKAMURA Tomoaki | Professor |
| Cryogenics Science Center Head /J-PARC Center Cryogenics Section | NAKAMOTO Tatsushi | Professor |
| Mechanical Engineering Center Head | HIRAKI Masahiko | Professor |
Applied Research Laboratory
| Director | NAMITO Yoshihito |
| Office | YANAGISAWA Tomoko |
Radiation Science Center
| Professor・Head | SANAMI Toshiya |
| Professor・Health and Safety Office （Tokai）Head＊ | BESSHO Kotaro |
| Professor | MATSUMURA Hiroshi |
| Professor／J-PARC Section Sub-Leader＊ | YAMAZAKI Hirohito |
| Associate Professor | IWASE Hiroshi |
| Associate Professor＊ | KISHIMOTO Yuji |
| Associate Professor＊ | SAITO Kiwamu |
| Associate Professor | YOSHIDA Go |
| Associate Professor・Environmental Safety Office Head | TAKECHI Hideaki |
| Assistant Professor＊ | LEE Eunji |
| Assistant Professor | SAKAKI Yasuhito |
| Assistant Professor＊ | SUGIHARA Kenta |
| Assistant Professor＊ | WATANABE Eisuke |
| Assistant Professor＊ | TRAN, Kim Tuyet |
| Senior Fellow | NUMAJIRI Masaharu |
| Chief Engineer＊ | NAKAMURA Hajime |
| Senior Engineer・Engineering Coordinator＊ | IIJIMA Kazuhiko |
| Expert Engineer＊ | TAKAHASHI Kazutoshi |
| Expert Engineer | TAKAHARA Shin-ichi |
| Expert Engineer・Engineering Counselor | TOYODA Akihiro |
| Expert Engineer | NAGAGURO Seiji |
| Engineer＊ | OYAMA Takahiro |
| Engineer | KOMIYA Aya |
| Engineer＊ | SAKAKIBARA Yoshinobu |
| Associate Engineer＊ | ISHIDA Masaki |
| Associate Engineer | TSUGANE Kiyokazu |
| Senior Fellow | TAIRA Masafumi |
| Assistant Technical Staff | SATO Mitsuru |
| Assistant Technical Staff＊ | HOZUMI Kenichi |
| Office | ICHIKAWA Satomi |
| Office | TOYOSHIMA Noriko |
| Office＊ | NEMOTO Ayaka |
＊J-PARC Center Safety Division
Computing Research Center
| Professor・Head | NAKAMURA Tomoaki |
| Professor | AOYAMA Shigeyoshi |
| Professor | SASAKI Takashi |
| Professor＊ | MURAKAMI Koichi |
| Associate Professor／J-PARC Section Leader＊ | SUZUKI Jiro |
| Associate Professor | IWAI Go |
| Associate Professor＊ | KISHIMOTO Tomoe |
| Associate Professor＊ | SUZUKI Soh |
| Associate Professor | OKADA Shogo |
| Associate Professor | SHIBATA Akihiro |
| Associate Professor | MATSUNAGA Hiroyuki |
| Associate Professor | MATSUFURU Hideo |
| Associate Professor | YONAMINE Ryo |
| Researcher | AMAKO Katsuya |
| Researcher | ISHIKAWA Tadashi |
| Researcher | YUASA Fukuko |
| Senior Engineer・Engineering Counselor＊ | NAKAMURA Teiji |
| Expert Engineer＊ | NISHIGUCHI Mitsuo |
| Expert Engineer＊ | HASHIMOTO Kiyoharu |
| Engineer | MAEDA Hirofumi |
| Associate Engineer | OMORI Konomi |
| Associate Engineer | KOIKE Sari |
| Technical Associate | UETA Jo |
| Technical Associate＊ | SASAGUCHI Ouka |
| Assistant Technical Staff | YASHIRO Shigeo |
| Office | KIMURA Yumiko |
| Office | FUKUDA Tomoko |
＊J-PARC Center Information System Section
Cryogenics Science Center
| Professor・Head＊ | NAKAMOTO Tatsushi |
| Professor／J-PARC Section Sub-Leader＊ | SASAKI Ken-ichi |
| Professor＊ | SUGANO Michinaka |
| Associate Professor＊ | IIO Masami |
| Associate Professor | SUZUKI Kento |
| Assistant Professor＊ | SUMI Naoyuki |
| Professor＊ | OGITSU Toru |
| Researcher | ABE Mitsushi |
| Senior Engineer・Engineering Counselor＊ | IIDA Masahisa |
| Senior Engineer＊ | OHHATA Hirokatsu |
| Expert Engineer＊ | Kurosawa Noriyuki |
| Engineer | IKEMOTO Yukiko |
| Associate Engineer＊ | OKADA Ryutaro |
| Associate Engineer | TAKAHASHI Naoto |
| Senior Fellow | TANAKA Kenichi |
| Assistant Technical Staff | ONO Kenta |
| Assistant Technical Staff | TERASHIMA Akio |
| Office＊ | KIKUCHI Midori |
| Office | KOTAKI Emiko |
＊J-PARC Center Cryogenics Section
Mechanical Engineering Center
| Professor・Head | HIRAKI Masahiko |
| Professor | YAMANAKA Masashi |
| Associate Professor | KUME Tatsuya |
| Assistant Professor | TAKASU Akira |
| Senior Engineer・Engineering Counselor | TAKATOMI Toshikazu |
| Senior Engineer | WATANABE Yuichi |
| Engineer | ABE Keiko |
| Engineer | OKADA Naoki |
| Engineer | HOSUMI Mitsugu |
| Associate Engineer | USHITANI Yuito |
| Technical Associate | ITO Yuhei |
| Technical Associate | KATAYAMA Miyu |
| Senior Fellow | KAWAMATA Hiroshi |
| Senior Fellow | SATO Nobuhiko |
| Assistant Technical Staff | INOUE Hitoshi |
| Assistant Technical Staff | IMAIZUMI Sakae |
| Office | SAKURAI Hiroko |
Diamond Fellow・Emeritus Fellow
As of October 1, 2025, In the order of the Japanese alphabet
