Stadium: Court 12 Round: 26 Ground: Hardcourt outdoor
| ITF Japan F2 | 2018/03/13 04:45 | Saito, Takashi v Naoki Nakagawa | 4-6,6-3,1-6 |
| Hong Kong, Simples M-ITF-HKG-01A | 2020/01/08 03:15 | Goncalo Oliveira v Saito, Takashi | 6-7,6-7 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/28 02:30 | Saito, Takashi v Nam, Ji Sung | 7-5,3-6,1-6 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/26 07:40 | Saito, Takashi v Taiyo Yamanaka | 6-2,7-6 |
| Challenger Kobe | 2019/11/04 03:25 | Saito, Takashi v Sho Shimabukuro | 6-7,3-6 |
| ITF M25 Tay Ninh | 2019/10/01 06:05 | Saito, Takashi v Congsup Congcar | 6-2,2-6,6-4 |
| Nanchang, Singles M-ITF-CHN-16A | 2019/09/28 02:00 | Saito, Takashi v Sabanin, Yan | 3-6,1-6 |
| Nanchang, Singles M-ITF-CHN-16A | 2019/09/27 04:10 | Taisei Ichikawa v Saito, Takashi | 4-6,6-2,3-6 |
| Nanchang, Singles M-ITF-CHN-16A | 2019/09/26 02:00 | Chandrasekar, Anirudh v Saito, Takashi | 7-5,0-6,0-6 |
| Hong Kong, Simples M-ITF-HKG-01A | 2020/01/08 05:30 | Yue, Ching Ho Sunny v Naoki Nakagawa | 4-6,1-6 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/27 02:30 | Duckhee Lee v Naoki Nakagawa | 6-1,6-4 |
| ITF M15 Changwon | 2019/10/19 02:00 | Boyer, Dusty H v Naoki Nakagawa | 5-7,6-3,7-5 |
| ITF M15 Changwon | 2019/10/18 01:00 | Shintaro Mochizuki v Naoki Nakagawa | 3-6,7-6,4-6 |
| ITF M15 Changwon | 2019/10/17 01:00 | Naoki Nakagawa v Hong, Seong Chan | 6-4,7-6 |
| ITF M15 Changwon | 2019/10/15 03:35 | Naoki Nakagawa v Kim, Sung Hun | 6-2,2-6,6-1 |
| ITF M25 Tay Ninh | 2019/10/11 05:00 | Yan Bai v Naoki Nakagawa | 6-2,7-5 |
| ITF M25 Tay Ninh | 2019/10/10 02:00 | Alexey Zakharov v Naoki Nakagawa | 4-6,7-6,5-7 |