Stadium: Court 8 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Nonthaburi | 2019/11/26 07:40 | Takashi Saito v Taiyo Yamanaka | 6-2,7-6 |
| Challenger Kobe | 2019/11/04 03:25 | Takashi Saito v Sho Shimabukuro | 6-7,3-6 |
| ITF M25 Tay Ninh | 2019/10/01 06:05 | Takashi Saito v Congsup Congcar | 6-2,2-6,6-4 |
| ITF M15 Nanchang | 2019/09/28 02:00 | Takashi Saito v Yan Sabanin | 3-6,1-6 |
| ITF M15 Nanchang | 2019/09/27 04:10 | Taisei Ichikawa v Takashi Saito | 4-6,6-2,3-6 |
| ITF M15 Nanchang | 2019/09/26 02:00 | Anirudh Chandrasekar v Takashi Saito | 7-5,0-6,0-6 |
| ITF M15 Nanchang | 2019/09/24 02:00 | Li-Wei Tan v Takashi Saito | 6-1,1-6,1-6 |
| ITF M15 Hua Hin | 2019/09/06 03:00 | Takashi Saito v Yusuke Takahashi | 2-6,2-6 |
| ITF M15 Nonthaburi | 2019/11/26 07:20 | Taisei Ichikawa v Ji Sung Nam | 5-7,2-6 |
| Challenger Kobe | 2019/11/07 02:00 | Yuki Mochizuki v Ji Sung Nam | 3-6,6-1,1-6 |
| Challenger Kobe | 2019/11/06 02:55 | Ben Patael v Ji Sung Nam | 2-6,4-6 |
| Challenger Shenzhen 2 | 2019/10/29 03:45 | Ji Sung Nam v Zhe Li | 2-6,1-6 |
| Challenger Liuzhou | 2019/10/23 02:30 | Ji Sung Nam v Danilo Petrovic | 3-6,4-6 |
| Challenger Liuzhou | 2019/10/22 02:00 | Ji Sung Nam v Kaichi Uchida | 6-3,7-6 |
| Challenger Ningbo | 2019/10/17 04:55 | Ji Sung Nam v Bradley Klahn | 6-7,6-7 |
| Challenger Ningbo | 2019/10/16 03:35 | Andrew Harris v Ji Sung Nam | 3-6,5-7 |