| India PBL | 02/08 14:30 | - | Sai Praneeth B. v Kazumasa Sakai | W | 0-2 | |
| India PBL | 02/03 14:50 | - | Ajay Jayaram v Kazumasa Sakai | L | 2-1 | |
| India PBL | 02/01 10:00 | - |
Kazumasa Sakai v
Tanongsak Saensomboonsuk
|
L | 0-2 | |
| India PBL | 01/30 11:20 | - |
Kazumasa Sakai v
S.K. Karunakaran
|
W | 2-0 | |
| India PBL | 01/27 13:50 | - | Kazumasa Sakai v Ansal Yadav | W | 2-0 | |
| India PBL | 01/25 14:30 | - | Kazumasa Sakai v Dong Keun Lee | L | 0-2 | |
| Korea Masters | 11/20 00:40 | 5 |
Kazumasa Sakai v
Sameer Verma
|
- | Retired | |
| Indonesia Masters | 10/02 12:20 | 5 |
Kazumasa Sakai v
Ajax U19
|
L | 0-2 | |
| Chinese Taipei Open | 09/04 10:40 | 5 |
Kazumasa Sakai v
Sourabh Verma
|
L | 0-2 | |
| Akita Masters | 08/15 02:15 | 4 | Kazumasa Sakai v Yu Igarashi | L | 1-2 | |
| Akita Masters | 08/14 03:30 | 5 |
Kazumasa Sakai v
Kodai Naraoka
|
W | 2-0 | |
| US Open | 07/11 21:15 | 4 |
Tanongsak Saensomboonsuk
v
Kazumasa Sakai |
L | 2-0 | |
| US Open | 07/10 21:15 | 5 | Timothy Lam v Kazumasa Sakai | W | 0-2 | |
| Canada Open | 07/03 17:50 | 5 | Kazumasa Sakai v Kwang Hee Heo | L | 0-2 | |
| Australian Open | 06/07 08:00 | 3 |
Tzu Wei Wang
v
Kazumasa Sakai |
L | 2-0 | |
| Australian Open | 06/06 03:45 | 4 |
Kazumasa Sakai v
Kantaphon Wangcharoen
|
W | 2-1 | |
| Australian Open | 06/05 01:40 | 5 |
Kazumasa Sakai v
Cheuk Yiu Lee
|
W | 2-0 | |
| New Zealand Open | 05/02 02:40 | 4 |
Zii Jia Lee
v
Kazumasa Sakai |
L | 2-0 | |
| New Zealand Open | 05/01 02:00 | 5 | Zeqi Zhou v Kazumasa Sakai | W | 1-2 | |
| Asia Championships | 04/24 04:00 | 5 |
Sameer Verma
v
Kazumasa Sakai |
L | 2-1 | |
| Osaka Int. | 04/04 00:00 | - |
Kazumasa Sakai v
Donghun Kim
|
D | Retired | |
| All England Open | 03/06 16:00 | 5 | Jan O Jorgensen v Kazumasa Sakai | L | 2-0 | |
| German Open | 02/27 18:45 | 5 |
Cheuk Yiu Lee
v
Kazumasa Sakai |
L | 2-0 | |
| Indonesia Masters | 01/23 02:30 | 5 | Sitthikom Thammasin v Kazumasa Sakai | L | 2-0 | |
| Indonesia Masters XD | 01/16 11:05 | 5 |
Viktor Axelsen
v
Kazumasa Sakai |
L | 2-0 | |
| Indonesia Masters XD | 11/14 12:45 | 5 |
Jonatan Christie
v
Kazumasa Sakai |
L | 2-0 | |
| All England Open | 11/08 04:50 | 4 |
Kazumasa Sakai v
Yuqi Shi
|
L | 0-2 | |
| All England Open | 11/07 06:15 | 5 | Suppanyu Avihingsanon v Kazumasa Sakai | W | 1-2 | |
| French Open | 10/25 12:40 | 4 | Kento Momota v Kazumasa Sakai | L | 2-0 | |
| French Open | 10/24 11:00 | 5 | Kazumasa Sakai v Dan Lin | W | 2-1 |
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