| Osaka Int. | 2019/04/06 04:00 | Hashiru Shimono v Takuma Obayashi | W | 0-2 |
| Swedish Open | 2019/01/19 09:30 | Eetu Heino v Takuma Obayashi | L | 2-0 |
| Swedish Open | 2019/01/18 14:30 | B.R. Sankeerth v Takuma Obayashi | W | 0-2 |
| Giraldilla Int. XD | 2018/07/24 02:15 | Chih Chieh Yang v Takuma Obayashi | L | 2-0 |
| Giraldilla Int. XD | 2018/06/21 23:00 | Takuma Obayashi v Toby Penty | L | 0-2 |
| Giraldilla Int. XD | 2018/06/20 21:00 | Takuma Obayashi v Imran Wadia | W | 2-0 |
| Giraldilla Int. XD | 2018/06/20 02:15 | Xiaodong Sheng v Takuma Obayashi | W | 1-2 |
| Swiss Open - Kvalifikation - Damedouble | 2018/06/19 15:45 | Phillipe Charron v Takuma Obayashi | W | 0-2 |
| Osaka Int. | 2019/04/06 04:30 | Koki Watanabe v Pengbo Ren | W | 2-0 |
| Osaka Int. | 2019/04/04 06:40 | Hongyang Weng v Koki Watanabe | W | 0-2 |
| Orleans Masters | 2019/03/24 14:00 | Koki Watanabe v Thomas Rouxel | W | 2-1 |
| Orleans Masters | 2019/03/23 14:30 | Koki Watanabe v Shifeng Li | W | 2-0 |
| Orleans Masters | 2019/03/22 15:40 | Gatjra P F Cupu v Koki Watanabe | W | 0-2 |
| Orleans Masters | 2019/03/21 17:40 | Parupalli Kashyap v Koki Watanabe | W | 0-2 |
| Orleans Masters | 2019/03/20 10:30 | Gergely Krausz v Koki Watanabe | W | 1-2 |
| Orleans Masters | 2019/03/19 18:10 | Adrian Dziolko v Koki Watanabe | W | 0-2 |