| ITF Japan F6 | 05/31 02:30 | 25 | Ken Onishi v Gengo Kikuchi | 1-6,4-6 | |
| ITF Guam F1 | 05/27 05:45 | 27 | Gengo Kikuchi v Shuichi Sekiguchi | 6-7,6-7 | |
| ITF Guam F1 | 05/26 02:25 | 26 | Gengo Kikuchi v Shunrou Takeshima | 6-1,6-1 | |
| ITF Guam F1 | 05/24 00:00 | 25 | Gengo Kikuchi v Ken Onoda | 7-5,6-1 | |
| ITF China F7 | 05/17 02:00 | 25 | Alexios Halebian v Gengo Kikuchi | 4-6,7-6,3-6 | |
| ITF China F6 | 05/12 02:00 | 26 | Gengo Kikuchi v Raymond Sarmiento | 5-7,3-6 | |
| ITF China F6 | 05/10 02:00 | 25 | Gengo Kikuchi v Xiao Gong | 7-5,6-4 | |
| ITF Japan F5 | 04/08 01:00 | 26 | Makoto Ochi v Gengo Kikuchi | 6-3,6-0 | |
| ITF Japan F5 | 04/06 03:10 | 25 | Gengo Kikuchi v Soichiro Moritani | 6-4,7-6 | |
| ITF Japan F4 | 03/28 01:00 | 62 | Gengo Kikuchi v Keisuke Watanuki | 2-6,7-5,6-7 | |
| ITF Japan F4 | 03/26 00:00 | 62 | Gengo Kikuchi v Naoto Kai | 6-2,7-6 | |
| ITF Japan F3 | 03/22 01:00 | 25 | Duckhee Lee v Gengo Kikuchi | 4-6,6-1,6-2 | |
| ITF Japan F3 | 03/20 01:00 | 44 | Hiromasa Oku v Gengo Kikuchi | 2-6,1-6 | |
| ITF Japan F2 | 03/18 01:30 | 27 | Yunseong Chung v Gengo Kikuchi | 2-6,6-4,6-1 | |
| ITF Japan F2 | 03/16 02:30 | 26 | Gengo Kikuchi v Sora Fukuda | 7-5,6-3 | |
| ITF Japan F2 | 03/15 04:35 | 25 | Karunuday Singh v Gengo Kikuchi | 4-6,6-3,5-7 | |
| ITF Japan F1 | 03/13 02:00 | 29 | Gengo Kikuchi v Liang-Chi Huang | 5-7,5-7 | |
| ITF Japan F1 | 03/12 05:30 | 28 | Gengo Kikuchi v Shuichi Sekiguchi | 7-6,6-1 | |
| ITF Japan F1 | 03/12 01:00 | 27 | Takuto Niki v Gengo Kikuchi | 6-7,6-4,3-6 | |
| ITF Japan F1 | 03/10 06:50 | 26 | Gengo Kikuchi v Yusuke Watanuki | Retired | |
| ITF Japan F1 | 03/10 01:00 | 25 | Gengo Kikuchi v Yuqing Ning | 6-3,6-3 | |
| ITF Japan F1 | 03/07 01:00 | 62 | Gengo Kikuchi v Yuga Tashiro | 6-1,4-6,6-1 | |
| ITF Japan F1 | 03/06 01:00 | 62 | Gengo Kikuchi v Teppei Uesugi | 6-2,6-0 | |
| ITF Japan F6 | 06/09 04:00 | - | Ko Suzuki v Gengo Kikuchi | Retired | |
| ITF Japan F5 | 06/02 01:00 | - | Shunrou Takeshima v Gengo Kikuchi | 7-5,6-4 | |
| ITF Guam F1 | 05/31 01:00 | - | Gengo Kikuchi v Takao Suzuki | 3-6,3-6 | |
| ITF Guam F1 | 05/30 04:20 | - | Gengo Kikuchi v Ko Suzuki | 6-2,6-3 | |
| ITF Guam F1 | 05/29 04:25 | - | Kelsey Stevenson v Gengo Kikuchi | 2-6,3-6 | |
| ITF Guam F1 | 05/28 01:15 | - | Ken Onoda v Gengo Kikuchi | 4-6,6-7 | |
| ITF Guam F1 | 05/26 02:15 | - | Atsushi Ushida v Gengo Kikuchi | 0-6,4-6 |