- 2020/08 - 現在 U.S.-Japan Hadronic Physics Exchange Program for Studies of Hadron Structure and QCD Coordinating Committee
- 2023/11 - 2024/10 12th Circum-Pan-Pacific Symposium on High Energy Spin Physics, Hefei, China, 2024.10.26-29 International Advisory Committee
- 2022/11 - 2024/08 10th International Conference on Quarks and Nuclear Physics, Barcelona, Spain, 2024.7.8-12 International Advisory Committee
- 2022/06 - 2023/11 International Workshop on Electromagnetic Interactions with Nucleons and Nuclei, Cyprus, 2023.10.29-11.04 International Advisory Committee
- 2019/06 - 2023/10 16th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Mainz, Germany, 2023.10.15-20 International Advisory Committee
- 2019/10 - 2022/09 9th International Conference on Quarks and Nuclear Physics, Tallahassee, Florida, USA, 2022.09.5-9 International Advisory Committee
- 2021/01 - 2021/11 14th European Research Conference on Electromagnetic Interactions with Nucleons and Nuclei,(Online) Paphos, Cyprus, 2021.10.31-11.06 International Advisory Committee
- 2019/08 - 2021/10 24th International Spin Symposium, (Online/In-person) Matsue, Japan, 2021.10.18-22 Scientific Program Committee
- 2016/04 - 2021/03 Physical Society of Japan Representative
- 2020/08 - 2020/10 Workshop on Gluon content of proton and deuteron with the Spin Physics Detector at the NICA collider, (Online) Dubna, Russia, 2020.9.30-10.1, International Advisory Committee
- 2015/04 - 2020/03 High Energy Accelerator Research Organization (KEK) Managing Committee, Institute of Particle and Nuclear Studies
- 2011/04 - 2020/03 J-PARC Center Leader, Theory Group, Particle and Nuclear Physics Division
- 2011/04 - 2020/03 High Energy Accelerator Research Organization (KEK) Leader, J-PARC Theory Branch, KEK Theory Center, Institute of Particle and Nuclear Studies
- 2018/08 - 2019/11 International Workshop on Electromagnetic Interactions with Nucleons and Nuclei, Paphos, Cyprus, 2019.10.27-11.02 International Advisory Committee
- 2019/04 - 2019/08 11th Circum-Pan-Pacic Symposium on High Energy Spin Physics, Miyazaki, Japan, 2019.8.27-30 Local Organizing Committee
- 2018/03 - 2019/06 15th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA, 2019.6.2-7 International Advisory Committee
- 2016/04 - 2019/03 High Energy Accelerator Research Organization (KEK) Self-Evaluation Committee
- 2013/04 - 2019/03 Nuclear Theory Executive Committee in Japan Committee member
- 2005/04 - 2019/03 High Energy Accelerator Research Organization (KEK) Promotion Committee, Large-Scale Simulation Projects
- 2018/05 - 2018/10 International Workshop on Neutrino-Nucleus Interactions in the Few-GeV Region, L'Aquila, Italy, 2018.10.15-19 Scientific Program Committee
- 2017/10 - 2018/09 23rd International Symposium on Spin Physics and Related Phenomena, Ferrara, Italy, 2018.9.10-14 International Advisory Committee
- 2017/11 - 2018/06 International Workshop on New Frontiers in QCD 2018 -- Confinement, Phase Transition, Hadrons, and Hadron Interactions --, Kyoto University, Kyoto, Japan, 2018.5.28-6.29 International Advisory Committee
- 2016/03 - 2017/11 International Workshop on Electromagnetic Interactions with Nucleons and Nuclei, Paphos, Cyprus, 2017.10.29-11.4 International Advisory Committee
- 2017/02 - 2017/06 11th International Workshop on Neutrino-Nucleus Scattering in the Few-GeV Region, Toronto, Canada, 2017.6.25-30 Session Convener
- 2013/04 - 2017/03 Graduate University for Advanced Studies Self-Evaluation Committee, School of High Energy Accelerator Science
- 2013/04 - 2017/03 Graduate University for Advanced Studies Promotion Committee for Education, School of High Energy Accelerator Science
- 2015/07 - 2016/07 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Kyoto University, Kyoto, Japan, 2016.7.25-30 International Advisory Committee
- 2008/04 - 2016/03 High Energy Accelerator Research Organization (KEK) Author on Nuclear Physics, KEK Physics Book Series,
- 2005/04 - 2016/03 High Energy Accelerator Research Organization (KEK) Leader, Hadron-Nuclear-Field Theory Group, KEK, Theory Center, Particle and Nuclear Physics Division
- 2014/04 - 2015/10 10th Circum-Pan-Pacific Spin Symposium on High Energy Spin Physics, Taipei, Taiwan, 2015.10.5-8 International Advisory Committee
- 2014/04 - 2015/03 Nuclear Theory Executive Committee in Japan Chairperson
- 2014/03 - 2015/03 7th International Conference on Quarks and Nuclear Physics, Valparaiso, Chile, 2015.3.2-6 International Advisory Committee
- 2013/12 - 2014/11 4th International workshop on Nucleon Structure at Large Bjorken x, Laboratori Nazionali di Frascati, Italy, 2014.11.17-21 International Advisory Committee
- 2014/02 - 2014/05 9th International Workshop on Neutrino-Nucleus Interactions in the Few-GeV Region, Selsdon Park Hotel, Surrey, UK, 2014.5.19-24 Scientific Program Committee
- 2013/04 - 2014/03 Nuclear Theory Executive Committee in Japan Executive Secretary
- 2008/04 - 2014/03 High Energy Accelerator Research Organization (KEK) Program Advisory Committee, Japan Proton Accelerator Research Complex (J-PARC), Institute of Particle and Nuclear Studies
- 2005/04 - 2014/03 High Energy Accelerator Research Organization (KEK) Evaluation Committee, Large-Scale Simulation Proposals
- 2013/05 - 2013/10 9th Circum-Pan-Paci c Spin Symposium on High Energy Spin Physics, Shandong University, Jinan, China, 2013.10.28-31 International Advisory Committee
- 2011/03 - 2011/06 8th Circum-Pan-Pacific Spin Symposium on High Energy Spin Physics, Cairns, Australia, 2011.6.20-24 International Advisory Committee
- 2010/11 - 2011/03 Neutrino-Nucleus Interactions in the Few-GeV Region, Dehradun, Uttarakhand, India, 2011.3.7-11 Scientific Program Committee
- 2010/04 - 2011/03 Nuclear Theory Community in Japan Secretariat
- 2010/04 - 2010/12 12th International Conference on the Structure of Baryons, Osaka, Japan, 2010.12.7-11 Organizing Committee
- 2010/03 - 2010/10 3rd International Workshop on Nucleon Structure at Large Bjorken x, Jefferson Lab, Newport News, Virginia, USA, 2010.10.13-15 International Advisory Committee
- 2009/09 - 2010/07 International Workshop on High Energy Strong Interactions 2010: Parton Distributions and Dense QCD Matter, Kyoto, Japan, 2010.7.26-8.27 International Advisory Committee
- 2006/04 - 2010/03 High Energy Accelerator Research Organization (KEK) Self-Evaluation Committee
- 2009/02 - 2009/09 7th Circum-Pan-Pacific Spin Symposium on High Energy Spin Physics, Yamagata, Japan, 2009.9.15-18 Organizing Committee
- 2008/12 - 2009/05 6th International Workshop on Neutrino-Nucleus Interactions in the Few-GeV Region, Sitges (Barcelona), Spain, 2009.5.18-22 Scientific Program Committee
- 2008/04 - 2009/03 Physical Society of Japan Field Representative, Nuclear Theory Field
- 2005/04 - 2009/03 Nuclear Theory Executive Committee in Japan Committee member
- 2007/10 - 2008/05 6th International Conference on Perspectives in Hadronic Physics, International Centre for Theoretical Physics (ICTP), Trieste, Italy, 2008.5.12-16 International Advisory Committee
- 2007/04 - 2008/03 Physical Society of Japan Vice Field Representative, Nuclear Theory Field
- 2006/03 - 2007/06 International Nuclear Physics Conference, Tokyo, Japan, 2007.6.3-8 Program Committee
- 2006/04 - 2007/03 Physical Society of Japan Program Committee, Nuclear Theory Field
- 2005/04 - 2007/03 High Energy Accelerator Research Organization (KEK) Steering Committee, Institute of Particle and Nuclear Studies
- 2005/04 - 2007/03 High Energy Accelerator Research Organization (KEK) Future Planning Committee, Institute of Particle and Nuclear Studies
- 2005/03 - 2005/09 4th International Workshop on Neutrino-Nucleus Interactions in the Few-GeV Region, Okayama, Japan, 2005.9.26-29 Program and Organizing Committee