| Indonesia Masters - Mixed dubbel | 2017/07/14 22:40 | Koki Watanabe v Kanta Tsuneyama | L | 0-2 |
| Spain Masters | 2023/03/31 12:25 | Koki Watanabe v Anders Antonsen | L | 0-2 |
| Spain Masters | 2023/03/30 09:30 | Christo Popov v Koki Watanabe | W | 0-2 |
| Spain Masters | 2023/03/29 15:15 | Koki Watanabe v Tzu Wei Wang | W | 2-1 |
| Swiss Open | 2023/03/26 12:40 | Tien Chen Chou v Koki Watanabe | W | 1-2 |
| Swiss Open | 2023/03/25 17:30 | Koki Watanabe v Zii Jia Lee | W | 2-0 |
| Swiss Open | 2023/03/24 13:00 | Cheuk Yiu Lee v Koki Watanabe | W | 0-2 |
| Swiss Open | 2023/03/23 14:15 | Toma Junior Popov v Koki Watanabe | W | 1-2 |
| Swiss Open | 2023/03/22 13:40 | Sitthikom Thammasin v Koki Watanabe | W | 0-2 |
| Spain Masters | 2023/04/02 10:20 | Kenta Nishimoto v Kanta Tsuneyama | L | 2-1 |
| Spain Masters | 2023/04/01 14:25 | Anders Antonsen v Kanta Tsuneyama | W | 1-2 |
| Spain Masters | 2023/03/31 11:50 | Rasmus Gemke v Kanta Tsuneyama | W | 1-2 |
| Spain Masters | 2023/03/30 11:10 | Sameer Verma v Kanta Tsuneyama | W | 0-2 |
| Spain Masters | 2023/03/29 16:15 | Brian Yang v Kanta Tsuneyama | W | 0-2 |
| All England Open | 2023/03/15 12:20 | Kanta Tsuneyama v Yuqi Shi | L | 0-2 |
| German Open | 2023/03/09 14:35 | Guangzu Lu v Kanta Tsuneyama | L | 2-0 |
| German Open | 2023/03/08 09:40 | Daren Liew v Kanta Tsuneyama | W | 0-2 |