Stadium: Court 6 Round: 27 Ground: Hardcourt outdoor
| ITF Thailand F3 | 2018/09/06 02:00 | Soichiro Moritani v Takashi Saito | 7-5,6-2 |
| ITF Vietnam F2 | 2018/05/07 03:00 | Takashi Saito v Soichiro Moritani | 7-6,3-6,6-3 |
| ITF Japan F3 | 2018/03/18 01:00 | Soichiro Moritani v Takashi Saito | 6-3,3-6,0-6 |
| ITF M15 Tsukuba | 2019/03/27 01:00 | Takuto Niki v Takashi Saito | 6-4,6-2 |
| ITF M25 Hong Kong | 2019/01/03 02:00 | Takashi Saito v Julian Lenz | 3-6,1-6 |
| ITF M25 Hong Kong | 2019/01/02 02:00 | Benjamin Hassan v Takashi Saito | 1-6,4-6 |
| ITF M25 Hong Kong | 2019/01/01 02:00 | Takashi Saito v William Ma | 6-0,6-3 |
| ITF Hong Kong F3 | 2018/12/25 05:20 | Runhao Hua v Takashi Saito | 6-4,3-6,6-3 |
| Challenger Kobe | 2018/11/10 07:20 | Seita Watanabe v Takashi Saito | 4-6,7-5,7-6 |
| ITF Thailand F8 | 2018/11/08 02:00 | Antoine Bellier v Takashi Saito | 6-1,6-1 |
| ITF Thailand F8 | 2018/11/07 02:00 | Jirat Navasirisomboon v Takashi Saito | 0-6,0-6 |
| ITF M15 Nishi-Tama | 2019/03/06 01:00 | Soichiro Moritani v Keisuke Saitoh | 2-6,0-6 |
| ITF M15 Anning | 2019/01/11 05:10 | Soichiro Moritani v Shao-Fan Liu | 7-5,3-6,3-6 |
| ITF M15 Anning | 2019/01/10 03:45 | Soichiro Moritani v Kento Takeuchi | 2-6,6-3,7-5 |
| ITF M15 Anning | 2019/01/09 07:30 | Sora Fukuda v Soichiro Moritani | 3-6,2-6 |
| ITF M15 Anning | 2019/01/01 03:30 | Nitin Kumar Sinha v Soichiro Moritani | 6-1,6-7,6-3 |
| Challenger Kobe | 2018/11/10 05:30 | Soichiro Moritani v Tung-Lin Wu | 2-6,6-4,3-6 |
| ITF Thailand F6 | 2018/10/09 02:30 | Matic Spec v Soichiro Moritani | 6-1,5-7,6-3 |
| ITF Thailand F5 | 2018/10/03 05:30 | Soichiro Moritani v Kento Takeuchi | 4-6,5-7 |