Japan: M15 Kashiwa - Doubles - Main |
| Semi-finals | Nakagawa S./Ogura K. | Imamura M./Takeru Y. | 0:2 (64:7, 66:7) | details | 05.04.2024 |
| Quarter-finals | Nakagawa S./Ogura K. | Kumasaka T./Vithoontien L. | 2:1 (3:6, 7:5, 10:7) | details | 04.04.2024 |
| 1/8-finals | Matsui T./Uesugi K. | Nakagawa S./Ogura K. | 1:2 (6:3, 62:7, 10:12) | details | 02.04.2024 |
Japan: M15 Tsukuba - Doubles - Main |
| Final | Ho R./Nam Ji S. | Kusuhara Y./Nakagawa S. | 0:2 (5:7, 64:7) | details | 30.03.2024 |
| Semi-finals | Kusuhara Y./Nakagawa S. | Kozuma R./Yamamoto R. | 2:0 (6:2, 7:5) | details | 29.03.2024 |
| Quarter-finals | Kusuhara Y./Nakagawa S. | Kawachi K./Saitoh K. | 2:1 (6:3, 4:6, 10:7) | details | 28.03.2024 |
| 1/8-finals | Imamura M./Mochizuki Y. | Kusuhara Y./Nakagawa S. | 0:2 (1:6, 2:6) | details | 27.03.2024 |
Japan: M15 Hinode - Doubles - Main |
| Semi-finals | Imamura M./Uesugi K. | Kusuhara Y./Nakagawa S. | 2:1 (3:6, 6:3, 10:8) | details | 15.03.2024 |
| Quarter-finals | Isomura K./Xiao L. | Kusuhara Y./Nakagawa S. | 0:2 (1:6, 2:6) | details | 15.03.2024 |
| 1/8-finals | Manaka S./Nijo K. | Kusuhara Y./Nakagawa S. | 0:2 (2:6, 2:6) | details | 14.03.2024 |
Japan: M15 Yanagawa 2 - Doubles - Main |
| Final | Katayama S./Nakagawa S. | Kawachi K./Sueoka Y. | 2:0 (6:2, 6:3) | details | 30.12.2023 |
| Semi-finals | Ichikawa T./Kono Y. | Katayama S./Nakagawa S. | 0:2 (63:7, 2:6) | details | 29.12.2023 |
| Quarter-finals | Saitoh K./Yamanaka T. | Katayama S./Nakagawa S. | 0:2 (1:6, 1:6) | details | 28.12.2023 |
| 1/8-finals | Katayama S./Nakagawa S. | Liu S./Zhang C. | 2:0 (6:0, 6:3) | details | 26.12.2023 |
Japan: M15 Yanagawa - Doubles - Main |
| 1/8-finals | Nakagawa S./Ogura K. | Kawachi K./Nishiwaki K. | 1:2 (4:6, 6:3, 6:10) | details | 23.12.2023 |
Japan: M25 Takasaki - Doubles - Main |
| 1/8-finals | Ochi M./Tanuma R. | Kikuchi Y./Nakagawa S. | 2:0 (6:2, 7:5) | details | 19.09.2023 |
Japan: M25 Sapporo 2 - Doubles - Main |
| Final | Nakagawa S./Ogura K. | Kono Y./Kusuhara Y. | 2:1 (7:5, 4:6, 16:14) | details | 16.09.2023 |
| Semi-finals | Watanabe S./Takeru Y. | Nakagawa S./Ogura K. | 1:2 (5:7, 6:4, 9:11) | details | 16.09.2023 |
| Quarter-finals | Kawachi K./Sumizawa D. | Nakagawa S./Ogura K. | 1:2 (2:6, 6:4, 2:10) | details | 14.09.2023 |
| 1/8-finals | Kawano K./Taguchi R. | Nakagawa S./Ogura K. | 0:2 (64:7, 64:7) | details | 13.09.2023 |
Japan: M15 Karuizawa - Doubles - Main |
| 1/8-finals | Kono Y./Kusuhara Y. | Nakagawa S./Sueoka Y. | 2:1 (64:7, 6:3, 10:6) | details | 31.05.2023 |
Japan: M25 Sapporo 2 - Doubles - Main |
| 1/8-finals | Kawachi K./Kawakami R. | Horiuchi R./Nakagawa S. | 2:0 (6:3, 6:2) | details | 07.09.2022 |
Tunisia: M15 Monastir 10 - Doubles - Main |
| Quarter-finals | Nakagawa S./Takeru Y. | Giacomini L./Kivattsev K. | WO. | details | 13.03.2020 |
| 1/8-finals | Hua R./Zhang Z. | Nakagawa S./Takeru Y. | WO. | details | 12.03.2020 |