Stadium: Court 4 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Tsukuba | 2023/03/27 00:30 | Maximus Jones v Ryotaro Taguchi | 4-6,0-6 |
| ITF M25 Monastir | 2023/02/20 14:30 | Mischa Zverev v Ryotaro Taguchi | 6-2,6-1 |
| ITF M25 Monastir | 2023/02/20 10:10 | Ryotaro Taguchi v Marc Antoine Gaillard | 6-1,6-3 |
| UTR Pro Miki | 2023/02/11 00:30 | Yuta Kawahashi v Ryotaro Taguchi | 6-0,6-4 |
| UTR Pro Miki | 2023/02/10 05:30 | Ryohei Takase v Ryotaro Taguchi | 1-6,7-5,1-6 |
| UTR Pro Miki | 2023/02/09 03:30 | Ren Nakamura v Ryotaro Taguchi | 4-6,5-7 |
| UTR Pro Miki | 2023/02/06 03:30 | Ryotaro Taguchi v Seita Watanabe | 6-2,6-7,7-6 |
| ITF M15 Monastir | 2023/01/04 12:20 | Peter Fajta v Ryotaro Taguchi | 6-2,6-3 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Seiya Nakanishi v Issei Okamura | 2-6,4-6 |
| ITF M15 Aktobe | 2023/03/06 09:40 | Issei Okamura v Mykhailo Mossur | 4-6,6-3,5-10 |
| ITF M15 Aktobe | 2023/02/28 07:30 | Issei Okamura v Max Batyutenko | 6-7,6-4,7-10 |
| ITF M15 Aktobe | 2023/02/27 10:55 | Issei Okamura v Alexander Orlov | 6-2,7-6 |
| ITF M25 Burnie | 2023/02/07 23:00 | Adam Walton v Issei Okamura | 6-3,6-4 |
| ITF M25 Burnie | 2023/02/06 00:00 | Issei Okamura v Stefan Vujic | 7-6,7-6 |
| ITF M25 Burnie | 2023/02/05 01:00 | Issei Okamura v Mason Naumovski | 6-1,6-3 |
| Challenger Burnie | 2023/01/29 23:00 | Yusuke Takahashi v Issei Okamura | 6-4,6-2 |