Select tournament type
| Semi-finals | Nakagawa N. | Takahashi Y. | 0:2 (4:6, 4:6) | details | 29.03.2026 | ||
| 1/16-finals | Kikuchi Y. | Nakagawa N. | 2:1 (6:3, 2:6, 6:4) | details | 24.03.2026 | ||
| Quarter-finals | Hudd E. | Nakagawa N. | 2:0 (7:64, 6:4) | details | 20.03.2026 | ||
| 1/8-finals | Vithoontien L. | Nakagawa N. | 0:2 (2:6, 3:6) | details | 19.03.2026 | ||
| 1/16-finals | Nakagawa N. | Matsuda R. | 2:0 (6:1, 6:4) | details | 17.03.2026 | ||
| 1/16-finals | Nakagawa N. | Takahata R. | 0:2 (3:6, 2:6) | details | 11.03.2026 | ||
| 1/16-finals | Tu L. | Nakagawa N. | 2:1 (66:7, 6:4, 7:62) | details | 10.02.2026 | ||
| Final | Nakagawa N. | Tabata R. | 2:0 (6:1, 6:4) | details | 09.02.2026 | ||
| Semi-finals | Nakagawa N. | Kose C. | 2:0 (7:63, 6:2) | details | 08.02.2026 | ||
| 1/8-finals | Nakagawa N. | Hewitt C. | 1:2 (4:6, 6:3, 1:6) | details | 05.02.2026 | ||
| 1/16-finals | Walton A. | Nakagawa N. | 1:2 (6:4, 3:6, 4:6) | details | 03.02.2026 | ||
| Final | Imamura M. | Nakagawa N. | 0:2 (4:6, 4:6) | details | 02.02.2026 | ||
| Semi-finals | Pearson K. | Nakagawa N. | 0:2 (0:6, 3:6) | details | 01.02.2026 | ||
| Final | Nakagawa N. | Yamasaki J. | 0:2 (3:6, 1:6) | details | 17.11.2025 | ||
| Semi-finals | Nakagawa N. | Tobe Y. | 2:0 (6:4, 6:0) | details | 16.11.2025 | ||
| 1/16-finals | Takamisawa T. | Nakagawa N. | 2:0 (6:3, 7:5) | details | 22.10.2025 | ||
| 1/16-finals | Nakagawa N. | Yamanaka T. | 1:2 (6:3, 4:6, 4:6) | details | 17.09.2025 | ||
| Semi-finals | Nakagawa N. | Uchida K. | 1:2 (6:3, 3:6, 3:6) | details | 13.09.2025 | ||
| Quarter-finals | Nakagawa N. | Whitehouse M. | 2:0 (6:3, 6:4) | details | 12.09.2025 | ||
| 1/8-finals | Nakagawa N. | Shiraishi H. | 2:0 (6:3, 6:1) | details | 11.09.2025 | ||
| 1/16-finals | Nakagawa N. | Katayama S. | 2:0 (6:4, 6:2) | details | 09.09.2025 | ||
| Quarter-finals | Nakagawa N. | Kumasaka T. | 0:2 (3:6, 3:6) | details | 05.09.2025 | ||
| 1/8-finals | Nakagawa N. | Takamisawa T. | 2:0 (6:3, 6:4) | details | 04.09.2025 | ||
| 1/16-finals | Nakagawa N. | Saitoh K. | 2:0 (6:4, 6:4) | details | 02.09.2025 | ||
| Semi-finals | Nakagawa N. | Harper C. | 0:2 (3:6, 2:6) | details | 12.08.2025 | ||
| 1/8-finals | Wu Y. | Nakagawa N. | 2:0 (6:3, 6:2) | details | 06.08.2025 | ||
| 1/16-finals | Nakagawa N. | Perez A. | 2:0 (6:4, 6:3) | details | 04.08.2025 | ||
| Semi-finals | Nakagawa N. | Suresh D. | 0:1 RET. (64:7, 1:5) | details | 27.07.2025 | ||
| Semi-finals | Nakagawa N. | Bigun K. | 0:2 (4:6, 5:7) | details | 20.07.2025 | ||
| 1/16-finals | Kypson P. | Nakagawa N. | 2:0 (6:3, 6:1) | details | 15.07.2025 | ||
| 1/16-finals | Nakagawa N. | Sakamoto R. | 1:2 (64:7, 6:2, 3:6) | details | 09.07.2025 | ||
| 1/16-finals | Nakagawa N. | Sell K. | 0:2 (1:6, 5:7) | details | 01.07.2025 | ||
| 1/16-finals | Maloney P. | Nakagawa N. | CAN. | details | 03.06.2025 | ||
| Quarter-finals | Nakagawa N. | Andrade A. | 0:2 (4:6, 1:6) | details | 30.05.2025 | ||
| 1/8-finals | Galarneau A. | Nakagawa N. | 0:2 (3:6, 4:6) | details | 29.05.2025 | ||
| 1/16-finals | Nakagawa N. | Kotzen A. | 2:0 (6:4, 6:4) | details | 28.05.2025 | ||
| Semi-finals | Bouzige M. | Nakagawa N. | 2:0 (7:64, 6:4) | details | 20.04.2025 | ||
| Final | Shin S. | Nakagawa N. | 2:0 (6:1, 7:65) | details | 15.04.2025 | ||
| Semi-finals | Karlovskiy E. | Nakagawa N. | 1:2 (6:2, 3:6, 2:6) | details | 13.04.2025 | ||
| Semi-finals | Mannarino A. | Nakagawa N. | 2:1 (3:6, 6:3, 6:2) | details | 29.03.2025 | ||
| Quarter-finals | Matsuda R./Shiraishi H. | Nakagawa N./Tabata R. | 2:1 (6:1, 5:7, 12:10) | details | 19.03.2026 | ||
| 1/8-finals | Cho Seung Woo/Sim S. | Nakagawa N./Tabata R. | 1:2 (6:3, 3:6, 3:10) | details | 18.03.2026 | ||
| Quarter-finals | Imamura M./Tajima N. | Nakagawa N./Tanuma R. | 2:1 (4:6, 6:0, 10:5) | details | 12.09.2025 | ||
| 1/8-finals | Nakagawa N./Tanuma R. | Kono Y./Ogura K. | 2:0 (6:2, 7:64) | details | 10.09.2025 | ||
| 1/8-finals | Hazawa S./Mochizuki Y. | Nakagawa N./Yamasaki J. | 2:1 (4:6, 6:1, 11:9) | details | 03.09.2025 | ||
| Final | Chopra K./Martin A. | Nakagawa N./van Wyk K. | 2:1 (7:62, 3:6, 10:3) | details | 12.07.2025 | ||
| Semi-finals | Imamura M./Noguchi R. | Nakagawa N./van Wyk K. | 0:2 (5:7, 4:6) | details | 11.07.2025 | ||
| Quarter-finals | Nakagawa N./van Wyk K. | Pearson K./Shimizu Y. | 2:0 (7:5, 6:4) | details | 10.07.2025 | ||
| 1/8-finals | Nakagawa N./van Wyk K. | Arseneault M./Arseneault N. | 2:1 (65:7, 6:3, 10:8) | details | 09.07.2025 | ||
| 1/8-finals | Imamura M./Nakagawa N. | Manning W./Shick B. | 1:2 (3:6, 6:2, 11:13) | details | 02.07.2025 | ||