| 1/20 | 1/24 | International Symposium on Atomic Level Characterizations for New Materials and Devices in Winter 2025 (ALC-W '25) | Shin Furano Prince Hotel |
| 1/31 | Materials Innovation Strategy Symposium 2025 (MatISS 2025) | Tokyo Big Sight |
| 3/24 | 3/25 | International Conference on Condensed Conjugation | Kyoto University |
| 4/15 | 4/19 | 2025 International Conference on Electronics Packaging and iMAPS All Asia Conference (ICEP-IAAC2025) | Wakasato Municipal Cultural Hall |
| 4/23 | 4/25 | OPTICS & PHOTONICS International Exhibition 2025 (OPIE'25) | Pacifico Yokohama |
| 5/11 | 5/15 | 18th International Conference on New Diamond and Nano Carbons (NDNC2025) | B-Con Plaza, Beppu, Oita, Japan |
| 5/19 | 5/23 | The 11th International Conference on Surface Plasmon Photonics (SPP11) | Hitotsubashi Hall |
| 5/25 | 5/30 | The 19th International Symposium on Macrocyclic and Supramolecular Chemistry 2025 (ISMSC2025) | Rohm Theatre Kyoto |
| 6/7 | 6/10 | 1st International Conference on Molecular Spin Qubits Toward Quantum Computer and Sensors (ICMSQ2025) | Tohoku University |
| 6/17 | 6/20 | Neuronics Conference 2025 | National Institute for Materials Science |
| 6/18 | 6/20 | The 24th Scientific International Symposium on SIMS and Related Techniques Based on Ion-Solid Interactions (SISS-24) | Egret Himeji |
| 6/29 | 7/3 | 30th Optoelectronics and Communications Conference / International Conference on Photonics in Switching and Computing 2025 | Sapporo Convention Center |
| 7/1 | 7/4 | The 32nd International Workshop on Active-Matrix Flatpanel Displays and Devices
—TFT Technologies and FPD Materials— (AM-FPD'25) | Ryukoku Unversity |
| 7/14 | 7/18 | Training course on symmetry and group theory | High Energy Accelerator Research Organization (KEK) |
| 7/25 | 7/27 | 29th International Symposium on Ion-Atom Collisions (ISIAC2025) | 京都大学 |
| 7/29 | 8/5 | 34th International Conference on Photonic, Electronic and Atomic Collisions
(ICPEAC2025) | Sapporo Convention Center |
| 8/10 | 8/13 | The 17th International Conference on the Physics of Non-Crystalline Solids (PNCS17) | Tsukuba International Congress Center |
| 8/29 | 8/31 | Makyoh2025 | Kindai |
| 9/15 | 9/18 | International Conference on Solid State Devices and Materials 2025 (SSDM2025) | PACIFICO Yokohama |
| 9/15 | 9/19 | AITA 2025 | Kobe University |
| 9/24 | 9/26 | The 69th Fullerenes-Nanotubes-Graphene General Symposium | National Taiwan Normal University |
| 10/12 | 10/15 | MOC2025 (30th Microoptics Conference) | LIGHT CUBE UTSUNOMIYA |
| 10/19 | 10/22 | International Symposium on Imaging, Sensing, and Optical Memory (ISOM'25) | LIGHT CUBE UTSUNOMIYA |
| 10/20 | 10/22 | 1st IEEE International Conference on Device Technologies for Diversified Applications | TKP GardenCity PREMIUM Sendai Nishiguchi |
| 11/3 | 11/6 | 2nd JSME International Conference on Materials & Processing, ICM&P 2025 | Hilton Guam HOTELS |
| 11/4 | 11/7 | International Institute of Innovative Acoustic Emission (IIIAE2025) | Nagoya Convention Hall |
| 11/12 | 11/14 | EcoDesign2025 (14th International Symposium on Environmentally Conscious Design and Inverse Manufacturing) | Waseda University |
| 11/12 | 11/14 | The 46th Symposium on Ultrasonic Electronics | Kunibiki Messe |
| 11/13 | 11/14 | 46th International Symposium on Dry Process (DPS2025) | the Shiki Museum |
| 11/13 | 11/14 | IMFEDK 2025 | Ryukoku Univ. |
| 12/2 | 12/4 | 38th International Symposium on Superconductivity (ISS2025) | DEJIMA MESSE NAGASAKI |
| 12/3 | 12/5 | The 32nd International Display Workshops (IDW '25) | 広島国際会議場 |
| 12/8 | 12/13 | Materials Research Meeting 2025 | Pacifico Yokohama |
