| Summer Universiade | 07/09 10:10 | - | Bastien Rembert v Sakai, Asuka | L | 4-1 | |
| Summer Universiade | 07/07 10:20 | - | Sakai, Asuka v Sebastian Roman | W | 3-0 | |
| Summer Universiade | 07/06 08:58 | - | Mladin, Paul v Sakai, Asuka | W | 2-3 | |
| Japan Open 2019, MS | 06/12 00:50 | - | Truls Moregard v Sakai, Asuka | L | 4-1 | |
| Qatar Open XD | 11/15 15:30 | 1 | Jonathan Groth v Sakai, Asuka | L | 4-1 | |
| Qatar Open XD | 11/15 09:00 | 1 | Ganghyeon Park v Sakai, Asuka | L | 3-1 | |
| Qatar Open XD | 11/13 19:40 | 1 | Sakai, Asuka v Yang, Heng-Wei | W | 3-0 | |
| Qatar Open XD | 06/22 07:10 | 5 | Kristian Karlsson v Sakai, Asuka | L | 4-0 | |
| Qatar Open XD | 06/20 08:40 | 1 | Mizuki Oikawa v Sakai, Asuka | L | 3-2 | |
| Qatar Open XD | 06/15 02:21 | - | Sakai, Asuka v Ruwen Filus | L | 3-4 | |
| Qatar Open XD | 06/14 07:40 | 1 | Sakai, Asuka v Takami, Masaki | L | 2-3 | |
| Qatar Open XD | 04/19 06:10 | 1 | Sakai, Asuka v Jonghoon Lim | L | 1-3 | |
| Qatar Open XD | 02/21 17:53 | - | Sakai, Asuka v Siu Hang Lam | L | 0-3 | |
| Qatar Open 2019, MS | 02/17 09:45 | 4 | Tomokazu Harimoto v Sakai, Asuka | L | 4-2 | |
| Qatar Open 2019, MS | 02/16 14:15 | 5 | Sakai, Asuka v Samsonov, Vladimir | W | 4-0 | |
| Qatar Open 2019, MS | 02/15 13:23 | - | Siu Hang Lam v Sakai, Asuka | W | 2-3 | |
| Qatar Open 2019, MS | 02/15 10:45 | - | Izumo, Takuto v Sakai, Asuka | W | 1-3 | |
| Qatar Open 2019, MS | 02/14 15:17 | - | Can Akkuzu v Sakai, Asuka | L | 4-0 | |
| Qatar Open 2019, MS | 02/14 10:16 | - | Sakai, Asuka v Subhajit Saha | W | 4-0 | |
| Qatar Open 2019, MS | 02/14 06:01 | - | Abdulaziz Bu Shulaybi v Sakai, Asuka | W | 0-3 |