Stadium: Sub- Center Round: 19 Ground: Hardcourt outdoor
| ITF M15 Nishi-Tokyo | 2024/03/23 01:40 | Ryotaro Taguchi v Hikaru Shiraishi | 2-6,6-4,4-6 |
| ITF M25 Sapporo | 2023/09/05 04:55 | Hikaru Shiraishi v Ryotaro Taguchi | 4-6,6-4,0-6 |
| Challenger Yokkaichi | 2024/11/24 04:50 | Hikaru Shiraishi v Hayato Matsuoka | 7-6,3-6,6-4 |
| Challenger Yokohama | 2024/11/17 03:30 | Federico Cina v Hikaru Shiraishi | 6-1,3-6,6-4 |
| Challenger Kobe | 2024/11/10 07:00 | Elias Ymer v Hikaru Shiraishi | 6-4,7-5 |
| Challenger Matsuyama | 2024/11/03 01:00 | Hikaru Shiraishi v Philip Sekulic | 3-6,2-6 |
| Challenger Sydney | 2024/11/01 03:20 | Hikaru Shiraishi v Thanasi Kokkinakis | 2-6,1-6 |
| Challenger Sydney | 2024/10/30 00:15 | Marc Polmans v Hikaru Shiraishi | 6-3,1-6,2-6 |
| Challenger Sydney | 2024/10/28 03:25 | Hikaru Shiraishi v Moerani Bouzige | 6-2,6-4 |
| Challenger Playford | 2024/10/22 06:00 | Hikaru Shiraishi v Yuki Mochizuki | 4-6,4-6 |
| Challenger Yokkaichi | 2024/11/24 01:50 | Shion Motoyama v Ryotaro Taguchi | 1-6,2-6 |
| Challenger Yokohama | 2024/11/17 03:50 | Jakub Paul v Ryotaro Taguchi | 6-2,6-3 |
| ITF M25 Qian Daohu | 2024/10/31 03:50 | Kuan-Yi Lee v Ryotaro Taguchi | 6-4,1-6,7-5 |
| ITF M25 Qian Daohu | 2024/10/30 03:10 | Pawit Sornlaksup v Ryotaro Taguchi | 0-6,2-6 |
| ITF M25 Huzhou | 2024/10/26 04:00 | Ryotaro Taguchi v Fajing Sun | 5-7,3-6 |
| ITF M25 Huzhou | 2024/10/25 04:00 | Linang Xiao v Ryotaro Taguchi | 1-6,5-7 |
| ITF M25 Huzhou | 2024/10/23 05:55 | You Du v Ryotaro Taguchi | 3-6,2-6 |
| ITF M25 Sapporo | 2024/09/13 06:30 | Goncalo Oliveira v Ryotaro Taguchi | 6-1,6-1 |