| M25 Chennai | 01/14 06:00 | - | [387] Jonas Forejtek v Taisei Ichikawa [271] | 6-7,6-0,6-2 | |
| Challenger Nonthaburi | 01/06 06:05 | 25 |
[349] Yuta Shimizu
v
Taisei Ichikawa [267] |
3-6,7-6,6-4 | |
| Challenger Nonthaburi | 01/05 04:45 | 19 | Lorenzo Sciahbasi v Taisei Ichikawa | 5-7,4-6 | |
| Challenger Nonthaburi | 01/04 08:15 | 14 | Taisei Ichikawa v Yuki Mochizuki | 7-5,6-3 | |
| Challenger Playford | 11/23 23:30 | 19 | Blaise Bicknell v Taisei Ichikawa | 7-5,5-7,7-5 | |
| Challenger Playford | 11/23 02:30 | 45 | [287] Taisei Ichikawa v Emile Hudd [428] | 6-2,6-7,7-6 | |
| Challenger Yokohama | 11/18 03:20 | 25 |
[158] Kei Nishikori
v
Taisei Ichikawa [287] |
4-6,6-1,6-1 | |
| Challenger Yokohama | 11/17 01:00 | 19 | [260] Ryuki Matsuda v Taisei Ichikawa [305] | 5-7,3-6 | |
| Challenger Yokohama | 11/16 02:35 | 14 | Shogo Sanada v Taisei Ichikawa | 4-6,4-6 | |
| Challenger Kobe | 11/09 08:50 | 14 | [390] Akira Santillan v Taisei Ichikawa [309] | 6-1,6-1 | |
| Challenger Taipei | 11/04 04:10 | 25 | [309] Taisei Ichikawa v Neil Oberleitner [429] | 3-6,4-6 | |
| Challenger Taipei | 11/03 06:00 | 19 | Taisei Ichikawa v Kristjan Tamm | 7-6,6-3 | |
| Challenger Taipei | 11/02 09:50 | 14 | Taisei Ichikawa v Daiki Yoshimura | 7-5,6-2 | |
| ITF M15 Yanagawa | 10/31 06:34 | - | Taisei Ichikawa v Sho Katayama | 5-7,2-6 | |
| ITF M15 Yanagawa | 10/30 01:00 | - | Taisei Ichikawa v Minjong Park | 6-4,7-6 | |
| ITF M15 Yanagawa | 10/29 02:30 | - | Taisei Ichikawa v Naoto Tomizawa | 6-4,6-0 | |
| ITF M15 Tanagura | 10/21 00:30 | - | Dong Ju Kim v Taisei Ichikawa | 6-1,2-6,6-1 | |
| ITF M25 Takasaki | 09/18 01:00 | - | [310] Taisei Ichikawa v Kaichi Uchida [458] | 2-6,6-2,5-7 | |
| ITF M25 Takasaki | 09/15 02:30 | - | Taisei Ichikawa v Makoto Ochi | 6-2,6-4 | |
| ITF M25 Sapporo | 09/09 02:30 | - |
[304] Taisei Ichikawa v
South Africa
[424] 
|
2-6,1-6 | |
| ITF M25 Sapporo | 09/03 04:00 | - | [352] Taisei Ichikawa v Kaichi Uchida [180] | 4-6,6-7 | |
| ITF M25 Taipei | 08/28 02:00 | - |
[352] Taisei Ichikawa v
Charles Broom
[425] 
|
6-3,0-6,1-6 | |
| ITF M25 Taipei | 08/27 04:28 | - | Hong-Lin Fu v Taisei Ichikawa | 4-6,2-6 | |
| ITF M25 Taipei | 08/21 02:00 | - | [351] Taisei Ichikawa v Renta Tokuda [475] | 3-6,1-6 | |
| ITF M25 Taipei | 08/19 03:30 | - | [351] Taisei Ichikawa v Ethan Cook [468] | 6-3,6-3 | |
| ITF M15 Astana | 08/07 07:00 | - |
Taisei Ichikawa v
Egor Gerasimov
|
2-6,6-7 | |
| ITF M15 Astana | 08/06 08:51 | - | Alp Horoz v Taisei Ichikawa | 3-6,1-6 | |
| Challenger Astana | 07/28 08:15 | 19 | [444] Taisei Ichikawa v Uisung Park [306] | 3-6,3-6 | |
| Challenger Astana | 07/27 08:25 | 14 | [444] Taisei Ichikawa v Grigoriy Lomakin [398] | 6-4,3-6,7-6 | |
| ITF M15 Tokyo | 07/10 03:18 | - | [315] Yusuke Kusuhara v Taisei Ichikawa [470] | 4-6,6-2,7-6 |
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