| ITF M15 Kashiwa | 03/31 05:00 | 54 | Ray Ho v Shunsuke Nakagawa | 6-4,3-6,10-5 | |
| ITF M15 Tsukuba | 03/27 04:05 | 25 | Shunsuke Nakagawa v Kokoro Isomura | 3-6,6-4,0-6 | |
| ITF M15 Tsukuba | 03/25 06:00 | 54 | Shunsuke Nakagawa v Hayato Matsuoka | 6-3,3-6,4-10 | |
| ITF M15 Nishitōkyō | 03/21 03:10 | 26 | Jie Cui v Shunsuke Nakagawa | 6-0,6-4 | |
| ITF M15 Nishitōkyō | 03/20 01:00 | 25 | Kosuke Morita v Shunsuke Nakagawa | 4-6,5-7 | |
| ITF M15 Nishitōkyō | 03/18 03:30 | 54 | Yeongseok Jeong v Shunsuke Nakagawa | 6-7,2-6 | |
| ITF M15 Hinode | 03/14 00:55 | 26 | Yan Bai v Shunsuke Nakagawa | 6-2,6-2 | |
| ITF M15 Hinode | 03/11 04:45 | 62 | Seiya Nakanishi v Shunsuke Nakagawa | 4-6,2-6 | |
| ITF M15 Hinode | 03/11 01:00 | 62 | Sungbeen Sim v Shunsuke Nakagawa | 2-6,7-5,5-10 | |
| ITF M15 Yanagawa | 12/28 00:55 | 26 | Shunsuke Nakagawa v Sanhui Shin | 1-6,6-3,1-6 | |
| ITF M15 Yanagawa | 12/27 03:55 | 25 | Taiyo Yamanaka v Shunsuke Nakagawa | 6-4,4-6,5-7 | |
| ITF M15 Yanagawa | 12/26 00:30 | 54 | Hiroki Sakagawa v Shunsuke Nakagawa | 5-7,4-6 | |
| ITF M15 Yanagawa | 12/25 00:30 | 54 | Yusuke Kusuhara v Shunsuke Nakagawa | 4-6,2-6 | |
| ITF M15 Yanagawa | 12/18 01:00 | 54 | Shunsuke Nakagawa v Hong-Lin Fu | 4-6,6-7 | |
| Challenger Matsuyama | 11/08 02:35 | 25 | Taro Daniel v Shunsuke Nakagawa | 6-1,6-2 | |
| ITF M25 Takasaki | 09/18 03:10 | 19 | Collin Altamirano v Shunsuke Nakagawa | 6-3,6-2 | |
| ITF M25 Takasaki | 09/17 05:00 | 54 | Daiki Yoshimura v Shunsuke Nakagawa | 1-6,1-6 | |
| ITF M25 Sapporo | 09/11 00:50 | 54 | Ryotaro Taguchi v Shunsuke Nakagawa | 6-2,6-2 | |
| ITF M25 Sapporo | 09/10 01:00 | 54 | Kenta Nakamura v Shunsuke Nakagawa | 4-6,2-6 | |
| ITF M15 Karuizawa | 05/28 01:15 | 54 | Shunsuke Nakagawa v Shunrou Takeshima | 6-3,3-6,8-10 | |
| ITF M15 Monastir | 04/26 10:40 | 25 | Shunsuke Nakagawa v Aziz Ouakaa | 7-6,6-7,3-6 | |
| ITF M15 Monastir | 04/24 13:00 | 62 | Rayen Hermassi v Shunsuke Nakagawa | 2-6,1-6 | |
| ITF M15 Monastir | 04/24 08:00 | 62 | Shunsuke Nakagawa v Thomas George Brun | 6-2,6-3 | |
| ITF M15 Monastir | 04/20 09:30 | 26 | Yecong Mo v Shunsuke Nakagawa | 6-2,6-0 | |
| ITF M15 Monastir | 04/19 11:10 | 25 | Shunsuke Nakagawa v Szymon Kielan | 6-4,6-1 | |
| ITF M15 Monastir | 04/17 12:30 | 62 | Shunsuke Nakagawa v Omar Brigida | 6-1,7-5 | |
| ITF M15 Monastir | 04/17 08:00 | 62 | Sebastian Sorger v Shunsuke Nakagawa | 2-6,6-3,6-10 | |
| ITF M15 Monastir | 04/16 09:00 | 62 | Jinpeng Tang v Shunsuke Nakagawa | 1-6,1-6 | |
| ITF M25 Kashiwa | 04/02 02:30 | 54 | Yuttana Charoenphon v Shunsuke Nakagawa | 7-6,6-3 | |
| ITF M25 Tsukuba | 03/27 05:30 | 54 | Ko Suzuki v Shunsuke Nakagawa | 6-2,6-4 |