| All England Open | 10/06 10:40 | 4 | Suppanyu Avihingsanon v Kazumasa Sakai | L | 2-0 | |
| All England Open | 10/05 09:45 | 5 | Kazumasa Sakai v Kodai Naraoka | W | 2-1 | |
| All England Open | 10/04 11:10 | 6 | Kazumasa Sakai v Shreyansh Jaiswal | W | 2-0 | |
| All England Open | 09/28 03:25 | 5 | Kazumasa Sakai v Hyun Il Lee | L | 0-2 | |
| Indonesia Masters - Mixed dubbel | 09/27 06:00 | - | Kazumasa Sakai v Riichi Takeshita | W | 2-1 | |
| Indonesia Masters - Mixed dubbel | 09/27 01:55 | - | Yan Tuck Chan v Kazumasa Sakai | W | 0-2 | |
| Indonesia Masters - Mixed dubbel | 09/20 02:14 | - | Kazumasa Sakai v Anders Antonsen | L | 1-2 | |
| Macau Open | 11/27 08:15 | 4 | Dong Hoon Kim v Kazumasa Sakai | L | 2-0 | |
| Macau Open | 11/26 05:20 | 5 | Kazumasa Sakai v Hyeok Jin Jeon | W | 2-0 | |
| Macau Open | 11/25 09:00 | 6 | Ajay Jayaram v Kazumasa Sakai | W | 0-2 |