Koki Nara
2026
| J300 ASUNCION | 2R | |
| J300 SALINAS | Quarter | |
| J300 BARRANQUILLA | 1R |
2025
| J300 BRADENTON | 2R | |
| J500 MERIDA | 2R | |
| J300 ZAPOPAN | 1R | |
| J100 ZAPOPAN | [9] | Quarter |
| J100 ROME | [4] | Semi |
| J100 METEPEC-2 | [2] | Final |
| J100 METEPEC | [2] | 2R |
| J100 MOENCHENGLADBACH | 3R | |
| J100 NEUNKIRCHEN | 1R | |
| J100 PRAGUE | 2R | |
| J200 PILSEN | 1R | |
| J100 THEHAGUE-2 | 2R | |
| J60 MIKICITY | [3] | Semi |
| J30 MUNAKATA | [1] | Win |
2024
| J60 MANILACITY-2 | [7] | Win |
| J60 MANILACITY | [6] | Semi |
| J30 JAKARTA-2 | [7] | Win |
| J30 SURABAYA | [5] | Win |
| J30 YAMANASHI | [6] | Final |
| J60 MIKICITY-2 | 1R | |
| J60 MIKICITY | Quarter |
2023
Nation
JPN
Generation
Born in 2009 (16-17 years old)
World Ranking
Junior World Ranking　158th
Year-end Junior World Ranking
- Year-end 2025 343th
- Year-end 2024 507th
- Year-end 2023 2350th
Match Details
J300 ASUNCION
| W | 1R | Henrique Queiroz | 6-3 6-2 |
| L | 2R | Damir Zhalgasbay | 2-6 6-7 |
J300 SALINAS
| W | 1R | Rhys Lawlor | 6-1 1-1 |
| W | 2R | Angel Veliz | 6-4 3-0 |
| L | QF | Michael Antonius | 6-4 5-7 2-6 |
J300 BARRANQUILLA
| L | 1R | Christopher Thies | 3-6 7-5 2-6 |
J300 BRADENTON
| W | 1R | Donald Nikolas Stoot | 6-1 6-2 |
| L | 2R | Jordan Lee | 2-6 3-6 |
J500 MERIDA
| W | 1R | Sklar Phillips | 6-3 3-6 6-3 |
| L | 2R | Jamie Mackenzie | 6-4 4-6 2-6 |
J300 ZAPOPAN
| L | 1R | Jerrid Gaines Jr | 3-6 7-5 4-6 |
J100 ZAPOPAN
| W | 2R | Cristobal Plasencia Robles | 6-4 6-2 |
| W | 3R | Mauricio Schtulmann Gasca | 6-2 6-1 |
| L | QF | Aaron Gabet | 2-6 5-7 |
J100 ROME
| W | 1R | Maddox Iliescu | 3-6 6-0 6-1 |
| W | 2R | Kayden Colombo | 6-3 6-3 |
| W | 3R | Colter Amey | 7-6 6-4 |
| W | QF | Gadin Arun | 6-3 6-0 |
| L | SF | Matthew Shapiro | 4-6 4-6 |
J100 METEPEC-2
| W | 1R | Nicolas Reyes Dominguez | 6-1 6-0 |
| W | 2R | Andres Rendon | 6-4 4-6 6-3 |
| W | QF | Cristobal Plasencia Robles | 6-2 6-3 |
| W | SF | Carlo Arena Fava | 6-4 6-2 |
| L | F | Takahiro Kawaguchi | 3-6 0-6 |
J100 METEPEC
| W | 1R | Jose Tapia Soto | 6-1 6-2 |
| L | 2R | Gurjot Singh | 2-6 6-7 |
J100 MOENCHENGLADBACH
| 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 |
J100 NEUNKIRCHEN
| L | 1R | Jonathan Dazert | 4-6 6-1 8-10 |
J100 PRAGUE
| W | 1R | Max Frohlich | 6-2 3-6 6-2 |
| L | 2R | Jakub Kusy | 3-6 5-7 |
J200 PILSEN
| L | 1R | Filippo Alfano | 4-6 4-6 |
J100 THEHAGUE-2
| W | 1R | Jan Sadzik | 6-4 6-3 |
| L | 2R | Benjamin Azar | 4-6 1-6 |
J60 MIKICITY
| 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 |
J30 MUNAKATA
| 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 |
J60 MANILACITY-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 |
J60 MANILACITY
| 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 |
J30 JAKARTA-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 |
J30 SURABAYA
| 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 |
J30 YAMANASHI
| 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 |
J60 MIKICITY-2
| L | 1R | Shotaro Yamamoto | 0-6 6-3 2-6 |
J60 MIKICITY
| 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 |
J30 GIFU
| W | 1R | Haruto Koyanagi | 7-5 7-6 |
| L | 2R | Min Ho Ko | 4-6 6-3 6-7 |
J30 CHIGASAKI
| L | 1R | Yuki Okahashi | 4-6 3-6 |
J100 KAWAGUCHI
| 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: 10505, Number of registered players: 6,666, Number of registered results: 385,227