Stadium: Court 10 Round: 45 Ground: Hardcourt outdoor
| ITF Vietnam F2 | 2018/05/05 03:00 | Gengo Kikuchi v Yuichiro Inui | 6-4,6-4 |
| ITF M15 Mornington | 2019/03/26 23:00 | Yuichiro Inui v Stefan Skadarka | 3-6,3-6 |
| ITF M15 Mornington | 2019/03/25 23:00 | Yuichiro Inui v Joseph W. Van Meter | 6-3,6-3 |
| ITF M15 Mornington | 2019/03/24 23:00 | Yuichiro Inui v Matyas Fuele | 4-6,6-2,10-8 |
| ITF M15 Mornington | 2019/03/17 23:00 | Yuichiro Inui v William Ma | 6-7,4-6 |
| ITF - Nishi-Tokyo M15 | 2019/03/11 03:30 | Aoran Wang v Yuichiro Inui | 7-6,6-4 |
| ITF M15 Nishi-Tama | 2019/03/05 03:00 | Tomohiro Masabayashi v Yuichiro Inui | 6-2,6-1 |
| ITF M15 Anning | 2019/01/07 01:30 | Anirudh Chandrasekar v Yuichiro Inui | 7-5,6-3 |
| ITF M15 Anning | 2019/01/03 02:00 | Yuichiro Inui v Jie Cui | 2-6,2-6 |
| ITF M15 Kofu | 2019/03/21 06:55 | Mick Veldheer v Gengo Kikuchi | 7-6,6-3 |
| ITF M15 Kofu | 2019/03/19 01:00 | Gengo Kikuchi v Blake Ellis | 7-5,6-1 |
| ITF - Nishi-Tokyo M15 | 2019/03/13 02:20 | Seong Chan Hong v Gengo Kikuchi | 4-6,6-3,7-6 |
| ITF - Nishi-Tokyo M15 | 2019/03/12 01:00 | Gengo Kikuchi v Masaya Kobayashi | 4-6,7-5,10-6 |
| ITF - Nishi-Tokyo M15 | 2019/03/11 02:00 | Gengo Kikuchi v Pak Long Yeung | 6-4,6-2 |
| ITF M15 Nishi-Tama | 2019/03/08 02:30 | Gengo Kikuchi v Jumpei Yamasaki | 6-7,6-4,3-6 |
| ITF M15 Nishi-Tama | 2019/03/06 01:00 | Gengo Kikuchi v Kousuke Ogura | 7-5,7-5 |
| ITF Chinese Taipei F2 | 2018/07/24 02:00 | Hsien-Yin Peng v Gengo Kikuchi | 6-3,6-4 |