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| Semi-finals | Kaji H. | Kitahara Y. | 2:0 (6:4, 6:0) | detalhes | 20.06.2026 | ||
| Quarter-finals | Kitahara Y. | Naklo T. | 2:1 (6:3, 4:6, 7:64) | detalhes | 19.06.2026 | ||
| 1/8-finals | Kitahara Y. | Lin F. A. | 2:0 (6:1, 6:4) | detalhes | 18.06.2026 | ||
| 1/16-finals | Kawaguchi N. | Kitahara Y. | 1:2 (5:7, 6:4, 3:6) | detalhes | 16.06.2026 | ||
| Quarter-finals | Sato H. | Kitahara Y. | 2:0 (6:4, 6:1) | detalhes | 12.06.2026 | ||
| 1/8-finals | Noguchi S. | Kitahara Y. | 1:2 (3:6, 6:4, 2:6) | detalhes | 11.06.2026 | ||
| 1/16-finals | Wakana R. | Kitahara Y. | 0:2 (66:7, 3:6) | detalhes | 09.06.2026 | ||
| 1/16-finals | Nishino N. | Kitahara Y. | 2:0 (6:3, 6:1) | detalhes | 27.05.2026 | ||
| Semi-finals | Kitahara Y. | Saigo R. | 1:2 (1:6, 7:5, 68:7) | detalhes | 09.05.2026 | ||
| Quarter-finals | Kitahara Y. | Nishimoto S. | 2:1 (4:6, 6:1, 6:2) | detalhes | 08.05.2026 | ||
| 1/8-finals | Kitahara Y. | Yoshioka K. | 2:0 (6:4, 7:63) | detalhes | 07.05.2026 | ||
| 1/16-finals | Kitahara Y. | Nagata A. | 2:1 (3:6, 6:1, 6:2) | detalhes | 06.05.2026 | ||
| 1/8-finals | Kitahara Y. | Yoshimoto N. | 1:2 (6:3, 0:6, 1:6) | detalhes | 23.04.2026 | ||
| 1/16-finals | Mushika Mio | Kitahara Y. | 0:2 (4:6, 3:6) | detalhes | 21.04.2026 | ||
| 1/8-finals | Kitahara Y. | Kawaguchi N. | 0:2 (2:6, 3:6) | detalhes | 09.04.2026 | ||
| 1/16-finals | Kitahara Y. | Tsujioka S. | 2:0 (6:3, 6:2) | detalhes | 07.04.2026 | ||
| Semi-finals | Kitahara Y. | Subasic A. | 0:2 (3:6, 68:7) | detalhes | 14.03.2026 | ||
| Quarter-finals | Danilova O. | Kitahara Y. | 1:2 (2:6, 6:4, 5:7) | detalhes | 13.03.2026 | ||
| 1/8-finals | Shibata S. | Kitahara Y. | 1:2 (6:4, 0:6, 3:6) | detalhes | 11.03.2026 | ||
| 1/16-finals | Shah M. | Kitahara Y. | 0:2 (2:6, 1:6) | detalhes | 11.03.2026 | ||
| 1/16-finals | Micic E. | Kitahara Y. | 2:0 (6:2, 6:1) | detalhes | 03.03.2026 | ||
| 1/16-finals | Kitahara Y. | Ishii S. | 1:2 (610:7, 6:3, 2:6) | detalhes | 24.02.2026 | ||
| 1/16-finals | Goto R. | Kitahara Y. | 2:1 (6:3, 2:6, 6:4) | detalhes | 13.01.2026 | ||
| Quarter-finals | Kitahara Y. | Sema E. | 0:2 (1:6, 5:7) | detalhes | 09.01.2026 | ||
| 1/8-finals | Kitahara Y. | Gennaro C. | WO. | detalhes | 08.01.2026 | ||
| 1/16-finals | Kitahara Y. | Carpentier N. | 2:0 (6:4, 6:0) | detalhes | 07.01.2026 | ||
| 1/8-finals | Kitahara Y. | Fontenel C. | 0:2 (64:7, 2:6) | detalhes | 01.01.2026 | ||
| 1/16-finals | Kitahara Y. | Husar S. | 2:0 (6:1, 6:0) | detalhes | 31.12.2025 | ||
| Quarter-finals | Goto R. | Kitahara Y. | 2:0 (6:3, 7:67) | detalhes | 18.12.2025 | ||
| 1/8-finals | Rokusek S. | Kitahara Y. | 0:2 (3:6, 2:6) | detalhes | 18.12.2025 | ||
| Semi-finals | Back D./Tsao C. Y. | Kitahara Y./Nishino N. | 2:0 (6:1, 6:2) | detalhes | 19.06.2026 | ||
| Quarter-finals | Naklo T./Yang V. | Kitahara Y./Nishino N. | 0:2 (4:6, 4:6) | detalhes | 19.06.2026 | ||
| 1/8-finals | Kitahara Y./Nishino N. | Shimizu E./Yamazaki I. | 2:0 (7:66, 6:1) | detalhes | 18.06.2026 | ||
| 1/8-finals | Kitahara Y./Soeda K. | Leong S. L. X./Shin J. | 0:2 (3:6, 4:6) | detalhes | 10.06.2026 | ||
| 1/8-finals | Kodaka M./Tamura K. | Kitahara Y./Uemura M. | 2:1 (7:63, 0:6, 11:9) | detalhes | 26.05.2026 | ||
| 1/8-finals | Shimizu A./Shimizu E. | Kitahara Y./Matsuda R. | 2:0 (6:1, 6:2) | detalhes | 12.05.2026 | ||
| 1/8-finals | Miyamoto A./Sato H. | Kitahara Y./Uemura M. | 2:1 (64:7, 6:3, 10:5) | detalhes | 06.05.2026 | ||
| 1/8-finals | Kawagishi N./Kitahara Y. | Choi O./Jang G. | 0:2 (3:6, 5:7) | detalhes | 22.04.2026 | ||
| 1/8-finals | Kawagishi N./Kitahara Y. | Matsuda M./Shimizu E. | 0:2 (0:6, 2:6) | detalhes | 14.04.2026 | ||
| Quarter-finals | Arakawa N./Kitahara Y. | Rokusek S./Tran D. | 0:2 (3:6, 1:6) | detalhes | 12.03.2026 | ||
| 1/8-finals | Arakawa N./Kitahara Y. | Dunn E./Shibata S. | 2:1 (0:6, 7:63, 10:7) | detalhes | 10.03.2026 | ||
| 1/8-finals | Arakawa N./Rokusek S. | Colling S./Kitahara Y. | 2:0 (6:0, 6:3) | detalhes | 03.03.2026 | ||
| 1/8-finals | Arakawa N./Kitahara Y. | da Silva Fick G./McGiffin T. | 0:2 (2:6, 2:6) | detalhes | 24.02.2026 | ||
| 1/8-finals | Kitahara Y./Sema E. | Huang Yujia/Zhang Y. | 0:2 (4:6, 4:6) | detalhes | 14.01.2026 | ||
| Final | Kitahara Y./Sema E. | Toma M./Villet M. | 2:0 (6:1, 6:3) | detalhes | 03.01.2026 | ||
| Semi-finals | Kitahara Y./Sema E. | Ezzat Y./Jialin T. | 2:0 (6:4, 7:64) | detalhes | 02.01.2026 | ||
| Quarter-finals | Kitahara Y./Sema E. | Choi M. Y./Choi S. Y. | 2:0 (6:4, 7:5) | detalhes | 01.01.2026 | ||
| 1/8-finals | Kitahara Y./Sema E. | Gharbi E./Saafi R. | 2:0 (6:3, 6:2) | detalhes | 30.12.2025 | ||
| Semi-finals | Hosoki Y./Kitahara Y. | Houghton I./Tse E. | 1:2 (6:2, 2:6, 6:10) | detalhes | 19.12.2025 | ||
| Quarter-finals | Gale L./Oliver K. | Hosoki Y./Kitahara Y. | 0:2 (2:6, 3:6) | detalhes | 18.12.2025 | ||