| 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 | |
| Masters da Coreia | 11/20 00:40 | 5 | Kazumasa Sakai v Sameer Verma | - | Retired | |
| Indonésia - Masters | 10/02 12:20 | 5 | Kazumasa Sakai v Wisnu Yuli Prasetyo | L | 0-2 | |
| Open de Taipé da China | 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 | |
| Open dos EUA | 07/11 21:15 | 4 | Tanongsak Saensomboonsuk v Kazumasa Sakai | L | 2-0 | |
| Open dos EUA | 07/10 21:15 | 5 | Timothy Lam v Kazumasa Sakai | W | 0-2 | |
| Open do Canadá | 07/03 17:50 | 5 | Kazumasa Sakai v Kwang Hee Heo | L | 0-2 | |
| Open da Austrália | 06/07 08:00 | 3 | Tzu Wei Wang v Kazumasa Sakai | L | 2-0 | |
| Open da Austrália | 06/06 03:45 | 4 | Kazumasa Sakai v Kantaphon Wangcharoen | W | 2-1 | |
| Open da Austrália | 06/05 01:40 | 5 | Kazumasa Sakai v Cheuk Yiu Lee | W | 2-0 | |
| Open da Nova Zelândia | 05/02 02:40 | 4 | Zii Jia Lee v Kazumasa Sakai | L | 2-0 | |
| Open da Nova Zelândia | 05/01 02:00 | 5 | Zeqi Zhou v Kazumasa Sakai | W | 1-2 | |
| Campeonato da Ásia | 04/24 04:00 | 5 | Sameer Verma v Kazumasa Sakai | L | 2-1 | |
| Internacional de Osaka | 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 | |
| Indonésia - Masters | 01/23 02:30 | 5 | Sitthikom Thammasin v Kazumasa Sakai | L | 2-0 | |
| Indonésia - Masters - Duplas Mistas | 01/16 11:05 | 5 | Viktor Axelsen v Kazumasa Sakai | L | 2-0 | |
| Indonésia - Masters - Duplas Mistas | 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 | |
| Open de França | 10/25 12:40 | 4 | Kento Momota v Kazumasa Sakai | L | 2-0 | |
| Open de França | 10/24 11:00 | 5 | Kazumasa Sakai v Dan Lin | W | 2-1 |