| Year | Date | Time | Place | Participants | Others |
| 2022 | March 10 | 14:10~14:40 | Online | Zoom | |
| 2021 | March 25 | 14:10~14:40 | Online | 32 | Zoom |
| 2020 | April 3 | 14:30~15:00 | Online | 25 | Webex Meeting |
| 2019 | March 29 | 14:00~14:30 | Room 66, Kikai-Shinko-Kaikan, Tokyo | 27 | |
| 2018 | March 29 | 14:00~14:30 | Room 66, Kikai-Shinko-Kaikan, Tokyo | 24 | |
| 2017 | March 29 | 14:20~14:45 | Room 66, Kikai-Shinko-Kaikan, Tokyo | 28 | |
| 2016 | March 28 | 14:00~14:30 | Room 66, Kikai-Shinko-Kaikan, Tokyo | 34 | |
| 2015 | March 20 | 14:00~14:30 | Room 6D, Kikai-Shinko-Kaikan, Tokyo | 27 | |
| 2014 | March 14 | 14:00~14:30 | Room 6D, Kikai-Shinko-Kaikan, Tokyo | 28 | |
| 2013 | March 14 | 14:00~14:30 | Room 6D, Kikai-Shinko-Kaikan, Tokyo | 29 | |
| 2012 | March 13 | 14:00~14:30 | B2 Hall, Kikai-Shinko-Kaikan, Tokyo | 22 | |
| 2011 | March 11 | 14:00~14:30 | 7th Fl. Yuport, Tokyo | 17 | |
| 2010 | Oct. 8 | 10:30~11:00 | 4th Fl. ARCADIA ICHIGAYA, Tokyo | 25 |
*Link to further details (in Japanese)