| Challenger Matsuyama | 11/03 03:35 | 14 | Benoit Paire v Kentaro Otsuka | 6-1,6-0 | |
| ITF M15 Yanagawa | 10/28 01:30 | 54 | Taki Adachi v Kentaro Otsuka | 6-4,4-6,5-10 | |
| ITF M15 Hinode | 03/11 01:00 | 62 | Kentaro Otsuka v Shohei Chikami | 4-6,7-5,12-10 | |
| ITF M15 Hinode | 03/10 01:00 | 62 | Maximus Kawabata v Kentaro Otsuka | 1-6,0-6 |