| ITF Japan F8 | 06/14 02:50 | 26 | Σο Καταγιάμα v Keisuke Watanuki | 6-2,6-0 | |
| ITF Japan F8 | 06/12 01:00 | 25 | Keisuke Watanuki v Teppei Uesugi | 6-3,6-3 | |
| ITF Japan F8 | 06/11 00:30 | 62 | Keisuke Watanuki v Νταϊσούκ Σουμιζάγουα | 6-4,2-6,6-2 | |
| ITF Japan F3 | 03/17 00:30 | 44 | Keisuke Watanuki v Keisuke Numajiri | 3-6,1-6 | |
| Challenger Kyoto Qual | 02/17 01:00 | 45 | Keisuke Watanuki v Kosuke Shibano | 4-6,4-6 | |
| ITF Japan F8 | 06/15 02:30 | 26 | Keisuke Watanuki v Χιρογιάσου Εχάρα | 1-6,3-6 | |
| ITF Japan F8 | 06/14 05:50 | 25 | Ryota Kishi v Keisuke Watanuki | 0-6,1-6 | |
| ITF Japan F8 | 06/12 00:00 | 62 | Keisuke Watanuki v Καζούκι Νισιβάκι | 6-2,6-2 | |
| ITF Japan F8 | 06/10 04:00 | 62 | Keisuke Watanuki v Taketo Takamisawa | 4-6,6-2,6-3 | |
| ITF Japan F7 | 06/08 01:30 | 26 | Keisuke Watanuki v Κέντο Τακεούτσι | 3-6,5-7 | |
| ITF Japan F7 | 06/06 04:40 | 25 | Keisuke Watanuki v Τούνγκ-Λιν Βού | Retired | |
| ITF Japan F6 Qual | 05/29 01:00 | 54 | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 | |
| ITF Japan F6 Qual | 05/28 07:00 | - | Keisuke Watanuki v Yuto Sakai | 6-7,6-7 | |
| ITF Japan F6 Qual | 05/27 01:00 | 54 | Keisuke Watanuki v Sung Min Han | 6-4,6-0 | |
| ITF Japan F5 | 04/02 01:00 | 54 | Masaki Sasai v Keisuke Watanuki | 6-2,6-4 | |
| ITF Japan F5 | 04/01 02:00 | 54 | Takashi Yasugami v Keisuke Watanuki | 4-6,6-2,5-7 | |
| ITF Japan F4 | 03/28 01:00 | 62 | Μασάγια Κομπαγιάσι v Keisuke Watanuki | 6-3,6-2 | |
| ITF Japan F4 | 03/27 01:00 | 62 | Γιούγκα Τασίρο v Keisuke Watanuki | 2-6,6-7 | |
| ITF Japan F4 | 03/25 03:00 | 62 | Yu Chang v Keisuke Watanuki | 7-6,3-6,4-6 | |
| ITF Japan F2 | 03/14 04:20 | 25 | Γιουσούκε Τακαχάσι v Keisuke Watanuki | 6-2,6-2 | |
| ITF Japan F2 | 03/13 01:00 | 44 | Kittiphong Wachiramanowong v Keisuke Watanuki | 4-6,6-7 | |
| ITF Japan F2 | 03/12 02:00 | 44 | Keisuke Watanuki v Shinta Fujii | 6-2,2-6,6-2 | |
| ITF Japan F2 | 03/11 03:00 | 44 | Γιούτα Καβαχάσι v Keisuke Watanuki | 2-6,2-6 | |
| ITF Japan F1 | 03/06 01:00 | 62 | Kaito Itsusaki v Keisuke Watanuki | 6-3,6-3 | |
| ITF Japan F1 | 03/05 01:00 | 62 | Masaki Osafune v Keisuke Watanuki | 6-7,6-0,2-6 | |
| ITF Japan F8 | 06/16 02:15 | 26 | Keisuke Watanuki v Σο Καταγιάμα | 3-6,1-6 | |
| ITF Japan F8 | 06/15 04:30 | 25 | Shunrou Takeshima v Keisuke Watanuki | 6-7,0-6 | |
| ITF Japan F7 | 06/09 02:30 | 26 | Τσαν-Γέονγκ Οχ v Keisuke Watanuki | 6-3,6-7,6-4 | |
| ITF Japan F7 | 06/07 01:00 | 25 | Keisuke Watanuki v Τακούτο Νίκι | 6-4,7-6 | |
| ITF Japan F6 | 05/31 05:25 | 25 | Γιουσούκε Τακαχάσι v Keisuke Watanuki | 6-3,6-4 |