| ITF Japan F8 | 06/13 01:00 | 25 | Kikuchi, Gengo v Masaya Kobayashi | 6-0,6-1 | |
| ITF Japan F7 | 06/09 03:20 | 28 | Saito, Takashi v Kikuchi, Gengo | 4-6,7-6,6-3 | |
| ITF Japan F7 | 06/08 01:00 | 27 | Sho Shimabukuro v Kikuchi, Gengo | 4-6,4-6 | |
| ITF Japan F7 | 06/07 02:00 | 26 | Kikuchi, Gengo v Tashiro, Yuga | 6-2,6-2 | |
| ITF Japan F7 | 06/05 01:00 | 25 | Takuya Kumasaka v Kikuchi, Gengo | 6-3,3-6,4-6 | |
| ITF Vietnam F3 | 05/16 03:00 | 26 | Yu, Cheng-Yu v Kikuchi, Gengo | 6-3,6-1 | |
| ITF Vietnam F3 | 05/15 05:45 | 25 | Nguyen, Phuong van v Kikuchi, Gengo | 4-6,2-6 | |
| ITF Vietnam F3 | 05/13 04:00 | 54 | Kikuchi, Gengo v Thanapet Chanta | 7-6,6-4 | |
| ITF Vietnam F2 | 05/12 04:45 | 28 | Kikuchi, Gengo v Nam, Ji Sung | 4-6,3-6 | |
| ITF Vietnam F2 | 05/11 03:00 | 27 | Kikuchi, Gengo v Ryota Tanuma | 6-4,6-2 | |
| ITF Vietnam F2 | 05/09 04:25 | 26 | Vuradin, Lucas v Kikuchi, Gengo | Retired | |
| ITF Vietnam F2 | 05/08 03:00 | 25 | Kikuchi, Gengo v Yeung, Pak Long | 4-6,7-5,6-2 | |
| ITF Vietnam F2 | 05/06 04:00 | 54 | Kikuchi, Gengo v Niki Kaliyanda Poonacha | 6-1,6-1 | |
| ITF Vietnam F2 | 05/05 03:00 | 54 | Kikuchi, Gengo v Yuichiro Inui | 6-4,6-4 | |
| ITF Vietnam F1 | 04/30 03:00 | 25 | Kikuchi, Gengo v Chun Hsin Tseng | 2-6,7-6,4-6 | |
| ITF Japan F5 | 04/01 00:30 | 54 | Kikuchi, Gengo v Liu, Shao-Fan | 6-2,6-7,3-6 | |
| ITF Japan F5 | 03/31 00:30 | 54 | Kikuchi, Gengo v Daisuke Sumizawa | 6-1,6-3 | |
| ITF Japan F4 | 03/24 00:00 | 62 | Takeshima, Shunrou v Kikuchi, Gengo | Retired | |
| ITF Japan F3 | 03/20 06:00 | 25 | Tung-Lin Wu v Kikuchi, Gengo | 6-2,6-3 | |
| ITF Japan F3 | 03/18 01:00 | 44 | Kikuchi, Gengo v Kousuke Ogura | 6-3,6-2 | |
| ITF Japan F3 | 03/17 02:30 | 44 | Kikuchi, Gengo v Ko Suzuki | 6-2,3-6,6-3 | |
| ITF Japan F2 | 03/11 04:00 | 44 | Kikuchi, Gengo v Sakai, Yuto | 2-6,2-6 | |
| ITF Japan F1 | 03/08 01:30 | 26 | Naoki Nakagawa v Kikuchi, Gengo | 7-5,7-6 | |
| ITF Japan F1 | 03/07 01:00 | 25 | Yu, Cheng-Yu v Kikuchi, Gengo | 5-7,5-7 | |
| ITF Japan F1 | 03/05 01:00 | 62 | Kikuchi, Gengo v Masaya Kobayashi | 6-2,7-5 | |
| ITF Japan F1 | 03/03 01:00 | 62 | Kikuchi, Gengo v Kureoka, Takuya | 6-4,7-6 | |
| ITF Japan F8 | 06/16 01:00 | 27 | Kikuchi, Gengo v Ehara, Hiroyasu | Retired | |
| ITF Japan F8 | 06/15 03:30 | 26 | Kikuchi, Gengo v Nagao, Katsuki | 6-2,6-2 | |
| ITF Japan F8 | 06/14 04:00 | 25 | Kikuchi, Gengo v Matsuo, Yuki | 6-0,6-4 | |
| ITF Japan F7 | 06/06 01:00 | 25 | Kikuchi, Gengo v Sora Fukuda | 2-6,2-6 |