| 5/12 | 5/14 | 2021 International Conference on Electronics Packaging (ICEP 2021) | Online |
| 5/13 | RIKEN Symposium | Online |
| 5/18 | 5/21 | 13th International Conference on Organic Nonlinear Optics & 2021 International Conference on Organic Photonics and Electronics (ICONO13 & ICOPE2021) | Nara Kasugano International Forum IRAKA, Nara, Japan |
| 5/30 | 6/3 | The 33rd International Symposium on Power Semiconductor Devices and Ics (ISPSD2021) | Online |
| 5/31 | 6/3 | The Eighth International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2021) | Imizu Campus, Toyama University, Toyama, Japan |
| 6/10 | 6/11 | 20th International Workshop on Junction Technology (IWJT2021) | Online |
| 6/13 | 6/14 | Silicon Nanoelectronics Workshop 2021 (SNW2021) | RIHGA Royal Hotel Kyoto, Kyoto, Japan |
| 6/13 | 6/18 | 2021 Symposium on VLSI Technology / 2021 Symposium on VLSI Circuits (VLSI2021) | RIHGA Royal Hotel Kyoto, Kyoto, Japan |
| 6/15 | 6/17 | The 38th International Conference of Photopolymer Science and Technology (ICPST-38) | Online |
| 6/29 | 7/2 | 2021 The 28th International Workshop on Active-Matrix Flatpanel Displays and Devices-TFT Technologies and FPD Materials- (AM-FPD’21) | Online |
| 7/4 | 7/9 | The 11th International Conference on Molecular Imprinting (MIP2021) | International Conference Center Hiroshima, Hiroshima, Japan |
| 7/6 | 7/9 | 2021 IEEE International Interconnect Technology Conference (IITC2021) | Kyoto Research Park, Kyoto, Japan |
| 9/6 | 9/9 | 2021 International Conference on Solid State Devices and Materials (SSDM2021) | Online |
| 9/26 | 9/29 | The 26th Microoptics Conference (MOC2021) | Act City Hamamatsu, Shizuoka, Japan |
| 9/26 | 9/30 | International Conference on Extreme Ultraviolet Lithography, SPIE Photomask Technology + EUV Lithography | Online |
| 9/26 | 10/1 | 5th Asia-Pacific Conference on Plasma Physics | Centennial Hall Kyushu University School of Medicine, Fukuoka, Japan |
| 9/28 | 10/1 | The 11th International Conference on Flexible and Printed Electronics (ICFPE 2021) | Toki Messe, Niigata Convention Center, Niigata, Japan |
| 10/3 | 10/6 | International Symposium on Imaging, Sensing, and Optical Memory 2021 (ISOM'21) | The Kobe Chamber of Commerce and Industry, Hyogo, Japan |
| 10/5 | 10/7 | 2021 7th International Workshop on Low Temperature Bonding for 3D Integration
(LTB-3D 2021) | Nara Kasugano International Forum 甍 IRAKA |
| 10/12 | 10/15 | 2021 IEEE 10th Global Conference on Consumer Electronics (GCCE 2021) | Mielpalque Kyoto |
| 10/13 | 10/15 | Advanced Metallization Conference 2021 : 30th Asian Session (ADMETAPlus 2021） | Rengo Kaikan, Tokyo, Japan |
| 10/19 | 10/20 | ALC '21 Online (13th International Symposium on Atomic Level Characterizations for New Materials and Devices, '21) | オンライン開催 |
| 10/25 | 10/27 | The 42nd Symposium on UltraSonic Electronics (USE2021) | ACT City Congress Center, Hamamatsu, Shizuoka, Japan |
| 10/25 | 10/27 | The 41th Annual NANO Testing Symposium (NANOTS2021) | Kokusai Fashion Center |
| 10/26 | 10/29 | 34th International Microprocesses and Nanotechnology Conference (MNC2021) | Art Hotel Osaka Bay Tower, Osaka, Japan |
| 10/31 | 11/5 | 24th International Conference on Electronic Properties of Two-Dimensional Systems /
20th International Conference on Modulated Semiconductor Structures Joint Conference
(EP2DS-24/MSS-20) | Toyama International Conference Center, Toyama, Japan |
| 11/1 | 11/4 | 4th International Conference on Memristive Materials, Devices & Systems
(MEMRISYS 2021) | Tsukuba, Japan |
| 11/14 | 11/16 | 2021 International Workshop on Dielectric Thin Films for Future Electron Devices — Science and Technology — (2021 IWDTF) | Ookayama Campus, Tokyo Institute of Technology, Tokyo, Japan |
| 11/14 | 11/19 | The 14th International Conference of Nitride Semiconductors (ICNS-14) | Hilton Fukuoka Sea Hawk, Fukuoka, Japan |
| 11/17 | 11/19 | The 2021 International Meeting for Future of Electron Devices, Kansai (IMFEDK2021) | Avanti Kyoto Hall, Kyoto, Japan |
| 11/18 | 11/19 | 42nd International Symposium on Dry Process (DPS2021) | Masaru Ibuka Auditorium, Waseda University, Tokyo, Japan |
| 11/28 | 12/2 | The 9th International Symposium on Surface Science (ISSS-9) | Convention Center (Sunport Takamatsu), Takamatsu, Kagawa, Japan |
| 11/30 | 12/2 | The 34th International Symposium on Superconductivity (ISS2021) | Online |
| 12/1 | 12/3 | 12th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign2021) | オンライン開催 |
| 12/1 | 12/3 | The 28th International Display Workshops (IDW '21) | オンライン開催 |
| 12/13 | 12/17 | Materials Research Meeting 2021 (MRM2021) | Pacifico Yokohama North, Kanagawa, Japan |
| 12/15 | 12/17 | SEMICON Japan 2021 Hybrid | 東京ビッグサイト |
