| Title | Venue | Number of Participants | |
| 2016 | 2nd International Symposium on Heavy-Ion Radiotherapy and Advanced Technology | Tokyo | 140 |
| The 15th International Conference on X-Ray Lasers | Nara | 150 | |
| Expert Workshop on Radiation Monitoring for Protection of the Public after Major Radioactive Releases to the Environment: Feedback from the Accident at the Fukushima Daiichi NPS | Chiba | 50 | |
| 2017 | The Alliance for the Next Generation MRI & Contrast Agents in QST | Tokyo | 140 |
| The Council of Carbon-ion Radiotherapy Facility Founders in Japan | Tokyo | 210 | |
| 1st QST International Symposium “Quantum Life Science” | Chiba | 320 | |
| Joshikai for Future Scientists: International Mentoring Workshop in Science and Engineering | Chiba | 100 | |
| 13th International Workshop on Beryllium Technology | Chiba | 35 | |
| The 19th International Workshop of Ceramic Breeder Blanket Interactions | Kyoto | 31 | |
| 2018 | Joint Meeting of US-Japan MHD Workshop “Toward development of integrated studies of 3D magnetic field effects in fusion devices” 31st ITPA MHD Disruption and Control Topical Group | Ibaraki | 60 |
| 2nd QST International Symposium | Nara | 250 | |
| The 3rd International Symposium for MRI Alliance, QST | Tokyo | 100 | |
| International Open Laboratory Symposium 2018 | Chiba | 80 | |
| ICRP-QST-RERF Workshop on Individual Response to Ionizing Radiation | Tokyo | 80 | |
| 2019 | 3rd QST International Symposium | Nara | 208 |
| ICRP-QST Symposium on Radiological Protection of People and the Environment in the Event of a Large Nuclear Accident | Tokyo | 95 | |
| The 4th International Symposium for MRI Alliance, QST | Chiba | 88 | |
| IAEA workshop on engineering design of waste water treatment using radiation grafted adsorbent in RAS/1/023 (Developing and upscaling of radiation grafted materials for water treatment) | Gunma | 25 | |
| 2020 | 64th IAEA General Conference Virtual Side Event “Accelerated Progress of Radiation Oncology” | Chiba | 285 |
| 4th QST International Symposium | Gunma | 365 | |
| 2021 | 5th QST International Symposium | Chiba | 205 |
| 4th International Forum on Quantum Metrology & Sensing(IFQMS) |
Tokyo Chiba |
250 | |
| 2022 | The 6th QST International Symposium |
Tokyo Online |
318 |
| 41st Meeting of the ITPA Topical Group on Diagnostics |
Online |
170 | |
| 2023 | The 79th Fujihara Seminar: Prospects for High Field Science | Hyogo | 58 |
| RIXS/REXS workshop 2023 | Miyagi | 113 | |
| 7th International Symposium on the System of Radiological Protection |
Tokyo Online |
592 | |
| 2024 | The 7th QST International Symposium | Gunma | 260 |
| 19th International Workshop on H-mode Physics and Transport Barrier (H-mode WS 2024) | Ibaraki | 54 | |
| 8th QST International Symposium | Aomori | 198 | |
| International Training Course on Carbon Ion Radiotherapy (ITCCIR 2024) | Chiba, Gunma | 76 | |
| The 33rd Broader Approach Steering Committee | Aomori | 50 |