Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Yokohama Qual | 2018/02/24 01:00 | Kento Takeuchi v Jumpei Yamasaki | 3-6,3-6 |
| Challenger Kyoto Qual | 2018/02/17 02:25 | Shinta Fujii v Kento Takeuchi | 0-6,7-6,6-4 |
| Challenger Bangkok | 2018/01/08 04:55 | Marsel Ilhan v Kento Takeuchi | 6-1,6-2 |
| Challenger Bangkok Qual | 2017/12/30 06:05 | Kento Takeuchi v Gerard Granollers-Pujol | 2-6,3-6 |
| ITF Indonesia F8 | 2017/12/01 06:30 | Kento Takeuchi v Prajnesh Gunneswaran | 2-6,4-6 |
| ITF Indonesia F8 | 2017/11/28 03:30 | Kento Takeuchi v Shinta Fujii | 7-6,6-3 |
| ITF Indonesia F7 | 2017/11/23 04:00 | Alexei Popyrin v Kento Takeuchi | 6-1,6-2 |
| ITF Indonesia F7 | 2017/11/21 05:00 | Francesco Vilardo v Kento Takeuchi | 2-6,1-6 |
| ITF Japan F1 | 2018/03/05 01:00 | Gengo Kikuchi v Masaya Kobayashi | 6-2,7-5 |
| ITF Japan F1 | 2018/03/04 01:00 | Tomohiro Masabayashi v Masaya Kobayashi | 1-6,6-3,5-7 |
| ITF Turkey F7 | 2018/02/21 14:25 | Attila Balazs v Masaya Kobayashi | 6-1,6-3 |
| ITF Turkey F7 | 2018/02/19 07:00 | Masaya Kobayashi v Bogdan Ionut Apostol | 4-6,6-3,4-6 |
| ITF Turkey F7 | 2018/02/18 09:00 | Michiel de Krom v Masaya Kobayashi | 2-6,1-6 |
| ITF Turkey F7 | 2018/02/17 06:30 | Dmitry Myagkov v Masaya Kobayashi | 2-6,3-6 |
| ITF Turkey F6 | 2018/02/12 07:00 | Sho Shimabukuro v Masaya Kobayashi | 6-7,6-3,6-2 |
| ITF Turkey F6 | 2018/02/11 09:00 | Masaya Kobayashi v Felipe Meligeni Rodrigues Alves | 6-2,6-1 |