Stadium: Court F Round: 28 Ground: Hardcourt indoor
| ITF M15 Changwon | 2019/10/16 02:55 | Yuta Kawahashi v Michael Shabaz | 7-5,2-6,4-6 |
| ITF M15 Akishima | 2019/06/16 02:00 | Yuta Kawahashi v Yuta Kikuchi | 5-7,7-5,7-6 |
| ITF M15 Akishima | 2019/06/15 03:30 | Rio Noguchi v Yuta Kawahashi | 4-6,3-6 |
| ITF M15 Akishima | 2019/06/14 01:00 | Yuta Kawahashi v Kazuma Kawachi | 7-5,6-1 |
| ITF M15 Akishima | 2019/06/13 02:30 | Sho Shimabukuro v Yuta Kawahashi | 2-6,6-4,3-6 |
| ITF M15 Akishima | 2019/06/11 06:35 | Yuta Kawahashi v Kousuke Ogura | 6-0,6-0 |
| ITF M15 Karuizawa | 2019/05/29 04:00 | Yuta Kawahashi v Yuki Mochizuki | 1-6,2-6 |
| ITF M15 Tsukuba | 2019/03/26 01:00 | Ryohei Tagata v Yuta Kawahashi | 4-6,6-2,6-1 |
| ITF M15 Changwon | 2019/10/13 03:00 | Young Seok Lee v Ren Nakamura | 7-6,6-0 |
| ITF M25 Brisbane | 2019/09/29 04:00 | Stephen Kaldawi v Ren Nakamura | 6-3,6-4 |
| ITF M25 Darwin | 2019/09/23 03:00 | Taiyo Yamanaka v Ren Nakamura | 6-2,6-4 |
| ITF M15 Hua Hin | 2019/09/02 08:05 | Aaron Schmid v Ren Nakamura | 7-5,6-3 |
| ITF M15 Hua Hin | 2019/08/27 04:00 | Ren Nakamura v Cameron Green | 1-6,4-6 |
| Challenger Yokkaichi | 2019/08/06 03:15 | Ren Nakamura v Lucas Catarina | 1-6,2-6 |
| ITF M25 Taipei | 2019/07/23 03:50 | Ren Nakamura v Sam Taylor | 4-6,7-5,6-10 |
| ITF M25 Taipei | 2019/07/22 02:00 | Ren Nakamura v Harry Thursfield | 6-2,6-2 |