Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Nonthaburi | 2019/11/29 03:00 | Duckhee Lee v Keisuke Saitoh | 6-2,6-1 |
| ITF M15 Nonthaburi | 2019/11/28 02:30 | Keisuke Saitoh v Rio Noguchi | 7-5,7-6 |
| ITF M15 Nonthaburi | 2019/11/27 02:30 | Keisuke Saitoh v Ryota Tanuma | 6-2,7-6 |
| ITF M15 Akishima | 2019/06/14 03:15 | Rio Noguchi v Keisuke Saitoh | 6-1,6-1 |
| ITF M15 Akishima | 2019/06/13 04:05 | Keisuke Saitoh v Gengo Kikuchi | 7-5,6-0 |
| ITF M15 Akishima | 2019/06/12 02:40 | Keisuke Saitoh v Kyohei Yamanaka | 6-1,6-3 |
| ITF M15 Kashiwa | 2019/04/04 01:00 | Yusuke Takahashi v Keisuke Saitoh | 6-2,6-1 |
| ITF M15 Kofu | 2019/03/19 01:00 | Keisuke Saitoh v Jumpei Yamasaki | 2-6,3-6 |
| ITF M15 Nonthaburi | 2019/11/28 04:25 | Makoto Ochi v Sora Fukuda | 4-6,1-6 |
| ITF M15 Nonthaburi | 2019/11/26 06:00 | Makoto Ochi v Alexander Crnokrak | 6-4,6-4 |
| Challenger Liuzhou | 2019/10/23 04:55 | Denis Istomin v Makoto Ochi | 7-6,6-3 |
| Challenger Liuzhou | 2019/10/21 06:00 | Makoto Ochi v Ivan Sabanov | 6-2,6-2 |
| ITF M25 Tay Ninh | 2019/10/03 02:00 | Daniel Nguyen v Makoto Ochi | 4-6,6-4,7-5 |
| ITF M25 Tay Ninh | 2019/10/02 02:00 | Arjun Kadhe v Makoto Ochi | 2-6,6-2,2-6 |
| ITF M15 Nanchang | 2019/09/29 03:00 | Makoto Ochi v Yan Sabanin | 6-4,6-7,6-3 |
| ITF M15 Nanchang | 2019/09/28 02:00 | Makoto Ochi v Vladimir Ivanov | 3-6,6-4,6-3 |