Kokona Ishii
Generation
Born in 2010 (14-15 years old)
World Ranking
Junior World Ranking　590th
Year-end Junior World Ranking
- Year-end 2024 804th
- Year-end 2023 600th
Rival
Yuka Naito (1-1)
- [2024] J100KAWAGUCHI 3-6 7-5 6-2
- [2023] J60YAMANASHI 3-6 1-6
Miyu Nishiwaki (2-0)
- [2023] J30GIFU 6-2 6-4
- [2023] J30MATSUYAMA 2-6 7-6 7-5
Umi Tsujita (2-0)
- [2023] J60YAMANASHI 6-1 6-2
- [2023] J30GIFU 6-0 6-1
Match Details
| W | 1R | Sasha Natalie Chimedza | 6-2 6-2 |
| L | 2R | Jiayi Lin | 4-6 1-6 |
| W | 2R | Abbey Nikolic | 6-2 6-0 |
| L | 3R | Ava Beck | 2-6 1-6 |
| W | 1R | Tennielle Madis | 6-3 7-6 |
| W | 2R | Yuka Naito | 3-6 7-5 6-2 |
| W | QF | Gabrielle Villegas | 6-1 4-6 6-2 |
| L | SF | Aishi Das | 1-6 5-7 |
| L | 1R | Anna Perelman | 6-4 0-6 3-6 |
| L | 1R | Madinakhon Salidjanova | 6-7 3-6 |
| L | 2R | Leticia Solakov | 1-6 1-6 |
| L | 2R | Felien Willemse | 6-7 5-7 |
| W | 1R | Nathanielle Ann Wan Xuan Lee | 6-0 6-0 |
| L | 2R | Ada Kumru | 6-7 3-6 |
| W | 1R | Naomi Hagi | 6-3 6-2 |
| W | 2R | Kaili Demi Teso | 6-0 6-1 |
| L | QF | Amane Hattori | 3-6 6-3 4-6 |
| W | 1R | Natasha Lambrianidis | 6-0 6-0 |
| W | 2R | Anna Hsu | 6-2 6-1 |
| W | QF | Rio Otaki | 6-3 6-1 |
| W | SF | Risa Ookoshi | 6-1 6-1 |
| W | F | Shiori Takeda | 6-2 6-1 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 5774, Number of registered players: 3,011, Number of registered results: 222,093