| All England Open | 09/14 09:00 | 4 |
Anders Antonsen
v
Kazumasa Sakai |
W | 1-2 | |
| All England Open | 09/13 11:45 | 5 | Bin Qiao v Kazumasa Sakai | W | 1-2 | |
| US Open | 07/19 17:35 | 6 | Kazumasa Sakai v Kieran Merrilees | L | 0-2 | |
| Indonesia Masters XD | 07/12 00:00 | 1 | Toby Penty v Kazumasa Sakai | L | 2-1 | |
| Giraldilla Int. XD | 06/19 23:00 | 1 | Anthony Joe v Kazumasa Sakai | W | 0-2 | |
| Indonesia Open | 06/18 08:30 | 1 |
Kazumasa Sakai v
Srikanth Kidambi
|
L | 0-2 | |
| Indonesia Open | 06/17 04:50 | 2 |
H.S. Prannoy
v
Kazumasa Sakai |
W | 1-2 | |
| All England Open | 06/16 11:07 | - | Kazumasa Sakai v Rajiv Ouseph | W | 2-1 | |
| Indonesia Open | 06/16 09:40 | 3 | Kazumasa Sakai v Rajiv Ouseph | W | 2-1 | |
| Indonesia Open | 06/15 06:10 | 4 | Emil Holst v Kazumasa Sakai | W | 0-2 | |
| Indonesia Open | 06/14 10:20 | 5 | Wei Feng Chong v Kazumasa Sakai | W | 0-2 | |
| Indonesia Masters XD | 06/12 10:55 | 1 | Nan Wei v Kazumasa Sakai | W | 0-2 | |
| Indonesia Masters XD | 06/12 08:07 | - | Sony Dwi Kuncoro v Kazumasa Sakai | W | 0-2 | |
| All England Open | 04/26 10:40 | 5 | Chong Wei Lee v Kazumasa Sakai | L | 2-0 | |
| Giraldilla Int. XD | 04/11 03:50 | 1 | Kwang Hee Heo v Kazumasa Sakai | L | 2-0 | |
| Giraldilla Int. XD | 04/04 03:20 | 1 | Kazumasa Sakai v Brice Leverdez | L | 0-2 | |
| Giraldilla Int. XD | 03/30 11:30 | 1 | Kanta Tsuneyama v Kazumasa Sakai | L | 2-0 | |
| India Open | 03/29 06:10 | 5 |
Kazumasa Sakai v
Anders Antonsen
|
L | 0-2 | |
| Giraldilla Int. XD | 03/28 09:54 | - | Kazumasa Sakai v Kwang Hee Heo | W | 2-0 | |
| Giraldilla Int. XD | 03/28 07:00 | 1 | Kazumasa Sakai v Pratul Joshi | W | 2-0 | |
| California Int. Women | 03/10 18:40 | 3 |
Yuqi Shi
v
Kazumasa Sakai |
L | 2-0 | |
| California Int. Women | 03/09 19:40 | 4 | Kazumasa Sakai v Jan O Jorgensen | W | 2-0 | |
| California Int. Women | 03/08 17:40 | 5 | Kazumasa Sakai v Wing Ki Vincent Wong | W | 2-0 | |
| Indonesia Masters XD | 03/07 19:27 | - | Yu Hsien Lin v Kazumasa Sakai | W | 0-2 | |
| Indonesia Masters XD | 03/07 16:10 | - |
Kazumasa Sakai v
Sameer Verma
|
W | 2-0 | |
| All England Open | 02/28 19:45 | 6 | Zvonimir Durkinjak v Kazumasa Sakai | L | 2-0 | |
| All England Open | 02/15 13:12 | - | Kazumasa Sakai v Cao Cuong Pham | W | 2-0 | |
| California Int. Women | 11/24 06:00 | 4 |
Kazumasa Sakai v
Sameer Verma
|
L | 1-2 | |
| California Int. Women | 11/23 01:00 | 5 |
Kazumasa Sakai v
Yuqi Shi
|
W | 2-1 | |
| California Int. Women | 11/16 06:10 | 5 | Kazumasa Sakai v Kai Guo | L | 1-2 |