 Turkey: W15 Antalya 21 - Doubles - Main |
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| 1/8-finals | Jovanovic M./Niimi K. | Lazar S./Tiron E. C. A. | 1:2 (3:6, 6:4, 4:10) | details | 07.12.2023 |
| Turkey: W15 Antalya 20 - Doubles - Main |
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| Quarter-finals | Niimi K./Vasileva A. | Ceuca A. A./Kargina V. M. | 1:2 (7:64, 4:6, 5:10) | details | 01.12.2023 |
| 1/8-finals | Mettraux M./Zaar L. | Niimi K./Vasileva A. | 1:2 (6:2, 3:6, 10:12) | details | 30.11.2023 |
| Turkey: W15 Antalya 18 - Doubles - Main |
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| 1/8-finals | Niimi K./Uyar M. A. | Pinto G./Squarcialupi G. | 1:2 (6:3, 4:6, 8:10) | details | 15.11.2023 |
| Turkey: W15 Antalya 17 - Doubles - Main |
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| 1/8-finals | Modesti V./Turkmen D. | Jovanovic M./Niimi K. | 2:1 (65:7, 6:3, 10:4) | details | 08.11.2023 |
| Turkey: W15 Antalya 5 - Doubles - Main |
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| Quarter-finals | Kuramochi M./Marinkovic B. | Niimi K./Piestrzynska A. | 2:0 (6:4, 6:0) | details | 02.03.2023 |
| 1/8-finals | Niimi K./Piestrzynska A. | Matsuda R./Soke D. | 2:1 (2:6, 7:64, 10:4) | details | 01.03.2023 |
| Turkey: W15 Antalya 4 - Doubles - Main |
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| 1/8-finals | Dencheva R./Soke D. | Ksandinov S./Niimi K. | 2:0 (6:2, 6:2) | details | 21.02.2023 |
| Turkey: W15 Antalya 21 - Doubles - Main |
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| Final | Li Y./Niimi K. | Aikawa M./Van Impe A. | 2:0 (6:1, 6:2) | details | 20.11.2022 |
| Semi-finals | Curovic T./Falkner Z. | Li Y./Niimi K. | WO. | details | 18.11.2022 |
| Quarter-finals | Sevcikova L./Uyar M. A. | Li Y./Niimi K. | 0:2 (1:6, 62:7) | details | 17.11.2022 |
| 1/8-finals | Ilmeneva V./Kalimullina R. | Li Y./Niimi K. | 0:2 (2:6, 4:6) | details | 15.11.2022 |
| Turkey: W15 Antalya 20 - Doubles - Main |
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| Quarter-finals | Uyar M. A./Vojcinakova I. | Kochelaevskaia A./Niimi K. | 2:1 (6:2, 5:7, 10:6) | details | 10.11.2022 |
| 1/8-finals | Kochelaevskaia A./Niimi K. | Atay S./Elmas L. N. | 2:1 (7:5, 1:6, 10:2) | details | 08.11.2022 |
 Japan: W25 Makinohara - Doubles - Main |
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| 1/8-finals | Imamura S./Kozaki F. | Hasegawa M./Niimi K. | 2:0 (6:1, 6:1) | details | 05.10.2022 |
 Tunisia: W15 Monastir 17 - Doubles - Main |
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| 1/8-finals | Reayer A./Romero C. | Niimi K./Saito S. | 2:0 (7:63, 6:4) | details | 14.06.2022 |
| Tunisia: W15 Monastir 13 - Doubles - Main |
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| 1/8-finals | Berriri C./Niimi K. | Milenkovic K./Wildgruber A. | 0:2 (2:6, 0:6) | details | 18.05.2022 |
| Tunisia: W15 Monastir 45 - Doubles - Main |
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| 1/8-finals | Berriri C./Niimi K. | Dejnozkova T./Pulchartova L. | 0:2 (4:6, 3:6) | details | 23.11.2021 |
Australia: Australian Open - Singles - Qualification