日本原子力研究開発機構
In 1975, he was promoted to a full professor at the National Laboratory for High Energy Physics (today known as High Energy Accelerator Research Organization (KEK)), where he served as the Director General from 1989 to 2003. While serving as the Director General at KEK, he concurrently held positions (professor, councilor, Dean, and steering committee member) at various organizations such as the Graduate University for Advanced Studies (SOKENDAI), National Institute for Physiological Science (NIPS), National Institute of Polar Research (NIPR), National Institute for Fusion Science (NIFS), Okazaki National Research Institutes, and Institutes of Space and Astronautical Science (ISAS). He also served as a Chair of the International Committee for Future Accelerators (ICFA) from 1999 to 2002. KEKB, also called a B-factory for its copious production of B-mesons, is a particle accelerator used in the Belle experiment to study CP violation. He contributed significantly to the B-factory project as the Director General of KEK (the Japanese National Laboratory for High Energy Physics). He also provided strong leadership in setting up the long-baseline neutrino oscillation experiment connecting the proton synchrotron at KEK (the High Energy Accelerator Research Organization) and Super-Kamiokande (Super-Kamioka Neutrino Detection Experiment, abbreviated to Super-K or SK) in Kamioka, Gifu. He led the launch of J-PARC (Japan Proton Accelerator Research Complex) that was jointly developed between KEK and JAEA (the Japan Atomic Energy Agency).