Rikuto Yamaguchi
2020
| J4 SHENZHEN | [6] | Quarter |
| J3 SAITAMA | [4] | 1R |
2019
| J3 PUNE | 2R | |
| J4 DELHI | Quarter | |
| J5 CHIGASAKI | [1] | Semi |
| J2 CAUSEWAYBAY | 1R | |
| J4 KAOHSIUNG | [8] | Quarter |
| J4 MIKICITY-2 | 2R | |
| J5 NONTHABURI-2 | [6] | Semi |
| J1 NANJING | 1R | |
| J5 SINGAPORE-2 | [6] | Semi |
| J5 NONTHABURI | Quarter | |
| J2 TAINAN | 1R | |
| J5 SUNCHANG | [9] | 2R |
| J5 SINGAPORE | [13] | 2R |
| J4 CHRISTCHURCH | 2R | |
| J4 WELLINGTON | 1R | |
| J3 SAITAMA | 1R |
2018
Nation
JPN
Age
24 years old (born in 2002)
Year-end Junior World Ranking
- Year-end 2020 351th
- Year-end 2019 609th
- Year-end 2018 1591th
Match Details
J4 SHENZHEN
| W | 1R | Weiqi Yan | 6-1 6-4 |
| W | 2R | Christian Andre Sheng Liew | 6-3 7-5 |
| W | 3R | Zhan Zheng | 7-5 6-3 |
| L | QF | Shaoyun Liu | 1-6 2-6 |
J3 SAITAMA
| L | 1R | Asahi Harazaki | 4-6 0-6 |
J3 PUNE
| W | 1R | Anargha Ganguly | 7-5 6-1 |
| L | 2R | Rostislav Halfinger | 1-6 3-6 |
J4 DELHI
| W | 1R | Udit Gogoi | 6-2 6-4 |
| W | 2R | Krishan Hooda | 6-2 7-6 |
| L | QF | Ekansh Kumar | 3-6 4-6 |
J5 CHIGASAKI
| W | 1R | Taki Adachi | 6-2 6-1 |
| W | 2R | Yi Zhou | 6-4 6-0 |
| W | QF | Shoma Kita | 6-2 0-6 7-6 |
| L | SF | Taiyo Uenoyama | 3-6 0-6 |
J2 CAUSEWAYBAY
| L | 1R | Wai Yu Kai | 0-6 1-6 |
J4 KAOHSIUNG
| W | 2R | Chun Tang | 6-1 6-1 |
| W | 3R | Yu Shiang Huang | 5-7 6-3 6-0 |
| L | QF | Nan Hsun Lin | 5-7 0-6 |
J4 MIKICITY-2
| W | 1R | Yu Han Hsieh | 6-3 6-1 |
| L | 2R | Yu Zhang | 0-6 6-4 3-6 |
J5 NONTHABURI-2
| W | 2R | Brendan Nicholas Hendrata | 6-2 6-0 |
| W | 3R | Siravit Sudnate | 6-2 0-6 6-4 |
| W | QF | Prachaya Baibong | 6-4 6-2 |
| L | SF | Woobin Shin | 5-7 0-6 |
J1 NANJING
| L | 1R | Yuchen Pan | 4-6 2-5 |
J5 SINGAPORE-2
| W | 2R | Matthew Johnstone | 6-1 6-3 |
| W | 3R | Quoc Uy Vo | 6-0 6-1 |
| W | QF | Rohan Mehra | 7-6 6-1 |
| L | SF | Daniel Abadia | 4-6 6-3 2-6 |
J5 NONTHABURI
| W | 1R | Nathan Jattavapornvanit | 6-3 6-3 |
| W | 2R | Naufal Siddiq Kamaruzzaman | 6-3 6-3 |
| W | 3R | Rohan Loubser | 6-0 6-1 |
| L | QF | Ajay Malik | 1-6 1-6 |
J2 TAINAN
| L | 1R | Yan Cheng Chen | 3-6 4-6 |
J5 SUNCHANG
| W | 1R | Jun Yeol Bae | 6-3 6-4 |
| L | 2R | Seung Ha Song | 2-6 3-6 |
J5 SINGAPORE
| L | 2R | Daniel Abadia | 1-6 5-7 |
J4 CHRISTCHURCH
| W | 1R | Rahul Desai | 7-5 6-3 |
| L | 2R | George Stoupe | 1-6 2-6 |
J4 WELLINGTON
| L | 1R | Matthew Bosancic | 5-7 4-6 |
J3 SAITAMA
| L | 1R | Rui Katogi | 2-6 1-6 |
J4 SHENZHEN
| W | 1R | Xingyu Zou | 4-6 6-2 6-2 |
| W | 2R | Wenmao Li | 6-1 6-3 |
| L | 3R | Patorn Hanchaikul | 2-6 3-6 |
J4 HYOGO-2
| W | 1R | Daisuke Inagawa | 6-3 6-7 6-4 |
| L | 2R | Ryota Ishii | 0-6 2-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 14431, Number of registered players: 7,550, Number of registered results: 449,006