Koki Nara
2025
| J100Moenchengladbach | 3R | |
| J100Neunkirchen | 1R | |
| J100Prague | 2R | |
| J200Pilsen | 1R | |
| J100Thehague-2 | 2R | |
| J60Mikicity | [3] | Semi |
| J30Munakata | [1] | Win |
2024
| J60Manilacity-2 | [7] | Win |
| J60Manilacity | [6] | Semi |
| J30Jakarta-2 | [7] | Win |
| J30Surabaya | [5] | Win |
| J30Yamanashi | [6] | Final |
| J60Mikicity-2 | 1R | |
| J60Mikicity | Quarter |
2023
Generation
Born in 2009 (15-16 years old)
World Ranking
Junior World Ranking　393th
Year-end Junior World Ranking
- Year-end 2024 507th
- Year-end 2023 2350th
Match Details
2025 J100Moenchengladbach
| W | 1R | Jannis Piliar | 6-0 6-1 |
| W | 2R | Yanael Beranger | 6-0 7-5 |
| L | 3R | Vito Antonio Darderi | 6-7 2-6 |
2025 J100Neunkirchen
| L | 1R | Jonathan Dazert | 4-6 6-1 8-10 |
2025 J100Prague
| W | 1R | Max Frohlich | 6-2 3-6 6-2 |
| L | 2R | Jakub Kusy | 3-6 5-7 |
2025 J200Pilsen
| L | 1R | Filippo Alfano | 4-6 4-6 |
2025 J100Thehague-2
| W | 1R | Jan Sadzik | 6-4 6-3 |
| L | 2R | Benjamin Azar | 4-6 1-6 |
2025 J60Mikicity
| W | 1R | Yota Nishikori | 6-3 6-2 |
| W | 2R | Kodai Abe | 6-2 7-5 |
| W | QF | Ko Nagashima | 4-6 6-3 6-0 |
| L | SF | Kanata Ozaki | 3-6 6-3 6-7 |
2025 J30Munakata
| W | 1R | Kodai Abe | 6-0 6-4 |
| W | 2R | Yota Nishikori | 6-1 6-2 |
| W | QF | Kanari Izumisawa | 6-4 6-2 |
| W | SF | Ryo Kikawa | 6-4 6-4 |
| W | F | Kensuke Kobayashi | 6-3 3-6 10-4 |
2024 J60Manilacity-2
| W | 1R | Perawat Sukjai | 6-1 6-0 |
| W | 2R | Lucas Mock | 6-0 6-3 |
| W | QF | Luke Koh | 7-6 1-0 |
| W | SF | Lin Hao-Yu | 6-3 6-0 |
| W | F | Jay Lin Gibson | 6-2 6-2 |
2024 J60Manilacity
| W | 1R | Brian Duan | 6-1 6-1 |
| W | 2R | John Kendrick Bona | 4-6 6-2 6-2 |
| W | QF | Jay Lin Gibson | 7-5 6-4 |
| L | SF | Xiao-Feng Zhou | 6-2 5-7 5-7 |
2024 J30Jakarta-2
| W | 1R | Razan Dhawy Atmaja | 6-2 6-0 |
| W | 2R | M Ragil Putra Yudha | 1-6 6-3 6-2 |
| W | QF | Ahmad Fauzan | 7-5 6-2 |
| W | SF | Takahiro Kawaguchi | 6-1 6-2 |
| W | F | Sota Kagawa | 6-4 6-3 |
2024 J30Surabaya
| W | 2R | Eric Matthew Gunawan | 6-3 6-3 |
| W | 3R | M Ragil Putra Yudha | 6-4 6-4 |
| W | QF | Michal Ihsan Wicaksana | 6-2 6-4 |
| W | SF | Takahiro Kawaguchi | 7-6 4-6 6-4 |
| W | F | Sota Kagawa | 6-7 6-4 6-1 |
2024 J30Yamanashi
| W | 1R | Riku Oshima | 6-3 6-4 |
| W | 2R | Kazunari Yshii | 6-1 6-2 |
| W | QF | Kanta Watanabe | 6-3 6-4 |
| W | SF | Eita Suzuki | 6-2 7-5 |
| L | F | Ryuto Suzuki | 5-7 4-6 |
2024 J60Mikicity-2
| L | 1R | Shotaro Yamamoto | 0-6 6-3 2-6 |
2024 J60Mikicity
| W | 1R | Takuma Minamoto | 6-2 7-6 |
| W | 2R | Yuto Hazama | 3-6 6-3 6-3 |
| L | QF | Koshiro Nakamae | 7-5 1-6 4-6 |
2023 J30Gifu
| W | 1R | Haruto Koyanagi | 7-5 7-6 |
| L | 2R | Min Ho Ko | 4-6 6-3 6-7 |
2023 J30Chigasaki
| L | 1R | Yuki Okahashi | 4-6 3-6 |
2023 J100Kawaguchi
| W | 1R | Gaku Nayuki | 6-4 6-3 |
| L | 2R | Satoru Nakajima | 4-6 3-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 9232, Number of registered players: 5,739, Number of registered results: 303,630