| Estonian Int. | 2020/01/11 09:40 | Minoru Koga v Takuma Obayashi | W | 1-2 |
| Thailand Int. | 2023/03/09 07:00 | Takuma Obayashi v Rithvik Sanjeevi Satish Kumar | W | 2-1 |
| Thailand Int. | 2023/03/07 12:40 | Takuma Obayashi v Chia Hung Lu | W | 2-0 |
| Canada Open | 2022/10/02 19:40 | Takuma Obayashi v Alex Lanier | L | 1-2 |
| Canada Open | 2022/10/01 19:20 | Takuma Obayashi v Misha Zilberman | W | 2-0 |
| Canada Open | 2022/09/30 22:00 | Brian Yang v Takuma Obayashi | W | 0-2 |
| Canada Open | 2022/09/30 00:00 | Pablo Abian v Takuma Obayashi | W | 0-2 |
| Canada Open | 2022/09/28 17:00 | Johnathan Akin-Mulrooney v Takuma Obayashi | W | 0-2 |
| Canada Open | 2022/09/28 00:00 | Jett Ko v Takuma Obayashi | W | 0-2 |
| Thailand Int. | 2023/03/10 08:10 | Minoru Koga v Hyeok Jin Jeon | W | 2-0 |
| Thailand Int. | 2023/03/09 07:45 | Sholeh Aidil v Minoru Koga | W | 0-2 |
| Thailand Int. | 2023/03/08 12:50 | Hai Dang Nguyen v Minoru Koga | W | 0-2 |
| Estonian Int. | 2023/01/13 15:40 | Minoru Koga v Magnus Johannesen | L | 0-2 |
| Estonian Int. | 2023/01/13 08:45 | Minoru Koga v Elias Bracke | W | 2-0 |
| Irish Open | 2022/11/18 10:20 | Magnus Johannesen v Minoru Koga | L | 2-0 |
| Irish Open | 2022/11/17 20:20 | Felix Burestedt v Minoru Koga | W | 0-2 |
| Irish Open | 2022/11/17 11:40 | Minoru Koga v Daniel Nikolov | W | 2-0 |