 Austria: W35 Klagenfurt - Doubles - Main |
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| 1/8-finals | Rodriguez V./Sanchez A. S. | Okuwaki R./Sonobe W. | WO. | details | 27.05.2024 |
 Slovenia: W50 Otocec - Doubles - Main |
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| Semi-finals | Barry M./Okuwaki R. | Joint M./McAdoo R. | 1:2 (2:6, 6:4, 8:10) | details | 24.05.2024 |
| Quarter-finals | Barry M./Okuwaki R. | Hrdinkova D./Svatikova L. | 2:0 (6:3, 6:1) | details | 24.05.2024 |
| 1/8-finals | Sebestova I./Vargova N. | Barry M./Okuwaki R. | 1:2 (6:2, 4:6, 4:10) | details | 22.05.2024 |
 Turkey: W15 Antalya 14 - Doubles - Main |
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| Semi-finals | Burdina E./Grechkina A. | Kinoshita H./Okuwaki R. | 2:0 (7:66, 6:4) | details | 17.05.2024 |
| Quarter-finals | Kinoshita H./Okuwaki R. | Sezer M./Turkmen D. | 2:0 (6:4, 6:4) | details | 16.05.2024 |
| 1/8-finals | Kinoshita H./Okuwaki R. | Cirpanli D./Soke D. | 2:1 (0:6, 7:64, 10:6) | details | 15.05.2024 |
| Turkey: W15 Antalya 13 - Doubles - Main |
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| 1/8-finals | El Aouni A./Pace F. | Okuwaki R./Ounmuang S. | 2:0 (6:3, 6:2) | details | 08.05.2024 |
| Turkey: W15 Antalya 12 - Doubles - Main |
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| Final | Boehner L./Turkmen D. | Nagata A./Okuwaki R. | 2:1 (7:5, 64:7, 10:7) | details | 04.05.2024 |
| Semi-finals | De Stefano S./Varul L. | Nagata A./Okuwaki R. | 1:2 (6:3, 4:6, 6:10) | details | 03.05.2024 |
| Quarter-finals | Ounmuang S./Ruamrak P. | Nagata A./Okuwaki R. | 0:2 (3:6, 2:6) | details | 02.05.2024 |
| 1/8-finals | El Aouni A./Kinoshita H. | Nagata A./Okuwaki R. | 0:2 (65:7, 1:6) | details | 01.05.2024 |
| Turkey: W15 Antalya 11 - Doubles - Main |
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| Semi-finals | El Aouni A./Granwehr A. | Okuwaki R./Yoruk I. | 2:1 (2:6, 6:3, 10:6) | details | 26.04.2024 |
| Quarter-finals | Hietaranta L./Martinez Solis C. S. | Okuwaki R./Yoruk I. | 1:2 (0:6, 7:65, 10:12) | details | 25.04.2024 |
| 1/8-finals | Grekul E./Moron F. B. | Okuwaki R./Yoruk I. | 0:2 (0:6, 1:6) | details | 24.04.2024 |
 India: W35 Indore - Doubles - Main |
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| 1/8-finals | Bhatia R./Ozeki M. | Balu S./Okuwaki R. | 1:0 RET. (6:1, 2:1) | details | 13.03.2024 |
| India: W35 Nagpur - Doubles - Main |
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| 1/8-finals | Balu S./Okuwaki R. | Tona M./Yamalapalli S. | 1:2 (5:7, 6:4, 8:10) | details | 06.03.2024 |
| India: W35 Gurugram - Doubles - Main |
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| 1/8-finals | Kulambayeva Z./Raina A. | Desai Z./Okuwaki R. | 2:1 (2:6, 6:3, 11:9) | details | 28.02.2024 |
 Tunisia: W15 Monastir 2 - Doubles - Main |
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| Semi-finals | Vargova N./Zelnickova R. | Nagata A./Okuwaki R. | 2:1 (62:7, 6:3, 10:8) | details | 13.01.2024 |
| Quarter-finals | Nagata A./Okuwaki R. | Hanatani N./Kawagishi N. | 2:1 (2:6, 7:65, 10:6) | details | 11.01.2024 |
| 1/8-finals | Nagata A./Okuwaki R. | Pfeifer L./Zvonaru I. | 2:0 (6:3, 6:4) | details | 09.01.2024 |
| Tunisia: W15 Monastir - Doubles - Main |
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| Final | Di Girolami T./Mansouri Y. | Nagata A./Okuwaki R. | 0:2 (2:6, 65:7) | details | 06.01.2024 |
| Semi-finals | Boehner L./Zhabrailova M. | Nagata A./Okuwaki R. | 1:2 (6:4, 1:6, 6:10) | details | 05.01.2024 |
| Quarter-finals | Covi F./Serban I. M. | Nagata A./Okuwaki R. | 0:2 (4:6, 2:6) | details | 04.01.2024 |
| 1/8-finals | Marcon M./Reguer A. | Nagata A./Okuwaki R. | 1:2 (7:65, 4:6, 3:10) | details | 03.01.2024 |
| Tunisia: W15 Monastir 44 - Doubles - Main |
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| 1/8-finals | Atay S./Semenova A. | Easwaramurthi A./Okuwaki R. | 2:0 (7:66, 6:1) | details | 26.12.2023 |
 Japan: W100 Takasaki 2 - Doubles - Main |
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| 1/8-finals | Li Y./Okuwaki R. | Lamens S./Tikhonova A. | 0:2 (65:7, 2:6) | details | 22.11.2023 |
| Japan: W40 Nanao - Doubles - Main |
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| 1/8-finals | Kinoshita H./Okuwaki R. | Higashitani N./Lee E. | 0:2 (1:6, 3:6) | details | 28.09.2023 |
| Japan: W25 Kyoto - Doubles - Main |
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| Quarter-finals | Hayashi E./Imamura S. | Hsieh Y./Okuwaki R. | 2:0 (6:1, 6:0) | details | 21.09.2023 |
| 1/8-finals | Hsieh Y./Okuwaki R. | Matsumoto A./Oshino S. | 2:0 (6:1, 6:3) | details | 19.09.2023 |
