Name: Issei Okamura
Country: Japan
Birthdate: 26.05.92, 31 years
ATP ranking: 870
TOP ranking's position: 574 (08.08.16, 55 points)
Points: 15
Prize money: 59670 $
Matches total: 443
Win: 211
%: 47.63 %
Country: Japan
Birthdate: 26.05.92, 31 years
ATP ranking: 870
TOP ranking's position: 574 (08.08.16, 55 points)
Points: 15
Prize money: 59670 $
Matches total: 443
Win: 211
%: 47.63 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2024 | 8/9 | 8/9 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2023 | 18/24 | 17/18 | 0/4 | 1/2 | 0/0 | 0/0 | 0/0 |
| 2022 | 12/14 | 11/12 | 1/2 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2021 | 8/10 | 8/8 | 0/2 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2020 | 11/11 | 11/11 | 0/0 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2019 | 18/26 | 13/22 | 1/2 | 0/0 | 0/0 | 4/2 | 0/0 |
| 2018 | 28/27 | 23/21 | 4/4 | 1/1 | 0/1 | 0/0 | 0/0 |
| 2017 | 14/32 | 11/19 | 2/8 | 0/2 | 1/3 | 0/0 | 0/0 |
| 2016 | 33/33 | 19/22 | 13/7 | 0/2 | 1/2 | 0/0 | 0/0 |
| 2015 | 40/27 | 31/21 | 9/5 | 0/1 | 0/0 | 0/0 | 0/0 |
| 2014 | 7/10 | 5/5 | 0/2 | 0/1 | 2/2 | 0/0 | 0/0 |
| 2013 | 12/7 | 12/6 | 0/0 | 0/0 | 0/1 | 0/0 | 0/0 |
| 2012 | 2/2 | 1/1 | 1/1 | 0/0 | 0/0 | 0/0 | 0/0 |
| TOTAL | 211/232 | 170/175 | 31/37 | 2/9 | 4/9 | 4/2 | 0/0 |
| perc. % | 47.63 % | 49.28 % | 45.59 % | 18.18 % | 30.77 % | 66.67 % | 0 % |
Issei Okamura / scheduled / last
| no matches found |
Issei Okamura form / surface: Clay
Issei Okamura / surface: Clay
| 23.08.23 | 1st round | Sanhui Shin | Issei Okamura | 6-3, 5-1, Issei Okamura - retired |  | match details | .png){kind=small} M25 Tainan | Clay |
| 16.08.23 | 1st round | Ergi Kirkin | Issei Okamura | 6-0, 6-2 | | match details | M25 Tainan | Clay |
| 21.06.23 | 1st round | Sanhui Shin | Issei Okamura | 6-2, 6-3 | | match details |  M25 Anseong | Clay |
| 30.05.23 | 1st round | Sanhui Shin | Issei Okamura | 3-6, 6-2, 6-1 | | match details |  M15 Karuizawa | Clay |
| 31.03.22 | 2nd round | Dayne Kelly | Issei Okamura | 6-0, 6-1 | | match details |  M25 Canberra | Clay |
| 29.03.22 | 1st round | Issei Okamura | Kento Takeuchi | 6-3, 4-6, 6-4 |  | match details | ||
| 22.03.22 | 1st round | Kento Takeuchi | Issei Okamura | 5-7, 6-2, 6-2 | | match details | M25 Canberra | Clay |
| 03.08.21 | 1st round | Aleksandre Bakshi | Issei Okamura | 7-66, 6-3 | | match details |  M15 Telavi | Clay |
| 27.07.21 | 1st round | Zura Tkemaladze | Issei Okamura | 7-60, 6-3 | | match details | M25 Telavi | Clay |
| 10.01.19 | 2nd round | Naoki Tajima | Issei Okamura | 4-6, 6-3, 6-4 | | match details |  M15 Anning | Clay |
| 08.01.19 | 1st round | Issei Okamura | Ti Chen | 6-2, 7-5 | | match details | ||
| 01.01.19 | 1st round | Tao Mu | Issei Okamura | 3-6, 6-2, 7-5 | | match details | M15 Anning | Clay |
| 04.06.18 | 1st round | Sora Fukuda | Issei Okamura | 6-3, 6-1 | | match details | Japan F7 | Clay |
| 25.01.18 | 1/4 | Tsung-Hua Yang | Issei Okamura | 6-3, 6-1 | | match details | China F3 | Clay |
| 24.01.18 | 2nd round | Issei Okamura | Cing-Yang Meng | 7-67, 6-2 | | match details | ||
| 22.01.18 | 1st round | Issei Okamura | Yan Bai | 6-1, 6-0 | | match details | ||
| 18.01.18 | 2nd round | Goran Markovic | Issei Okamura | 2-6, 6-0, 7-5 | | match details | China F2 | Clay |
| 16.01.18 | 1st round | Issei Okamura | Hu Liu | 5-7, 6-4, 6-2 | | match details | ||
| 10.01.18 | 2nd round | Ryota Tanuma | Issei Okamura | 6-1, 6-2 | | match details | China F1 | Clay |
| 09.01.18 | 1st round | Issei Okamura | Lingxi Zhao | 3-6, 6-3, 6-4 | | match details | ||
| 28.08.17 | 1st round | Juan Manuel Benitez Chavarriaga | Issei Okamura | 5-7, 7-5, 6-3 | | match details |  Switzerland F5 | Clay |
| 22.08.17 | 1st round | Raphael Baltensperger | Issei Okamura | 6-0, 4-6, 6-3 | | match details | Switzerland F4 | Clay |
| 14.08.17 | 1st round | Maxence Beauge | Issei Okamura | 6-1, 7-64 | | match details | Switzerland F3 | Clay |
| 30.05.17 | 1st round | Kento Takeuchi | Issei Okamura | 7-68, 6-3 | | match details | Japan F6 | Clay |
| 22.04.17 | q 1 | Denys Molchanov | Issei Okamura | 4-6, 6-3, 6-4 | | match details | Anning Challenger | Clay |
| 01.03.17 | 2nd round | Marco Bortolotti | Issei Okamura | 6-3, 7-5 | | match details | China F3 | Clay |
| 28.02.17 | 1st round | Issei Okamura | Chuhan Wang | 2-6, 7-5, 4-0, Chuhan Wang - retired | | match details | ||
| 23.02.17 | 2nd round | Jose Statham | Issei Okamura | 6-1, 6-3 | | match details | China F2 | Clay |
| 21.02.17 | 1st round | Issei Okamura | Caio Silva | 6-1, 6-0 | | match details | ||
| 14.02.17 | 1st round | Danilo Petrovic | Issei Okamura | 6-3, 6-2 | | match details | China F1 | Clay |
| 23.07.16 | fin | Thomas Fancutt | Issei Okamura | 6-2, 6-4 | | match details | China F13 | Clay |
| 22.07.16 | 1/2 | Issei Okamura | Ryota Tanuma | 6-3, 7-65 | | match details | ||
| 20.07.16 | 1/4 | Issei Okamura | Ranjeet Virali-Murugesan | 6-4, 6-3 | | match details | ||
| 20.07.16 | 2nd round | Issei Okamura | Koichi Sano | 6-0, 6-2 | | match details | ||
| 19.07.16 | 1st round | Issei Okamura | Ye Cong Mo | 6-2, 6-3 | | match details | ||
| 16.07.16 | 1/2 | Kuan-Yi Lee | Issei Okamura | 7-62, 6-4 | | match details | China F12 | Clay |
| 15.07.16 | 1/4 | Issei Okamura | Mitchell William Robins | 6-3, 5-7, 6-1 | | match details | ||
| 14.07.16 | 2nd round | Issei Okamura | Seungri Choi | 6-2, 6-78, 7-65 | | match details | ||
| 12.07.16 | 1st round | Issei Okamura | Wei-De Lin | 6-1, 6-4 | | match details | ||
| 09.07.16 | 1/2 | Bastian Trinker | Issei Okamura | 6-3, 6-4 | | match details | China F11 | Clay |
| 08.07.16 | 1/4 | Issei Okamura | Rigele Te | 6-3, 6-4 | | match details | ||
| 06.07.16 | 2nd round | Issei Okamura | Kazuma Kawachi | 6-3, 6-3 | | match details | ||
| 05.07.16 | 1st round | Issei Okamura | Wen-Chun Liang | 6-3, 6-4 | | match details | ||
| 31.05.16 | 1st round | Ko Suzuki | Issei Okamura | 6-1, 6-3 | | match details | Japan F6 | Clay |
| 16.05.16 | 1st round | Ryota Tanuma | Issei Okamura | 6-0, 6-3 | | match details |  Spain F14 | Clay |
| 12.05.16 | 2nd round | Juan Lizariturry | Issei Okamura | 7-5, 7-5 | | match details | Spain F13 | Clay |
| 11.05.16 | 1st round | Issei Okamura | Andrey Chepelev | 3-6, 6-4, 7-65 | | match details | ||
| 09.05.16 | qual. | Thibault Cancel | Issei Okamura | 4-6, 7-5, 6-4 | | match details | ||
| 09.05.16 | q 2 | Issei Okamura | Adria Vila-Rutllant | 6-1, 6-3 | | match details | ||
| 09.05.16 | q 1 | Issei Okamura | Brandon Levendale | 6-2, 6-1 | | match details | ||
| 12.10.15 | 1st round | Issei Okamura | Ilya Vasilyev | 6-2, 2-6, 6-4 | | match details |  Philippines F2 | Clay |
| 12.10.15 | 2nd round | Ching-Mou Yu | Issei Okamura | 6-3, 6-2 | | match details | ||
| 05.10.15 | 2nd round | Issei Okamura | Katsuki Nagao | 6-4, 6-4 | | match details | Philippines F1 | Clay |
| 05.10.15 | 1/4 | Kento Takeuchi | Issei Okamura | 6-1, 7-5 | | match details | ||
| 05.10.15 | 1st round | Issei Okamura | Kaza Vinayak Sharma | 5-7, 6-0, 6-1 | | match details | ||
| 01.06.15 | q 1 | Issei Okamura | Shota Iino | 6-3, 2-6, 6-4 | | match details | Japan F5 | Clay |
| 01.06.15 | qual. | Issei Okamura | Yusuke Yoshikawa | 6-0, 3-6, 6-3 | | match details | ||
| 01.06.15 | 1st round | Ryota Tanuma | Issei Okamura | 7-60, 6-4 | | match details | ||
| 13.04.15 | q 2 | Issei Okamura | Danyal Sualehe | 6-3, 6-1 | | match details | China F3 | Clay |
| 13.04.15 | 1st round | Aoxiong Wang | Issei Okamura | 4-6, 6-2, 6-3 | | match details | ||
| 13.04.15 | qual. | Issei Okamura | Shobu Ijima | 6-4, 7-62 | | match details | ||
| 06.04.15 | qual. | Issei Okamura | Zuxin Zheng | 6-0, 7-61 | | match details | China F2 | Clay |
| 06.04.15 | 1st round | Yan Bai | Issei Okamura | 6-0, 6-1 | | match details | ||
| 06.04.15 | q 2 | Issei Okamura | Jinghu Zhang | 7-5, 6-0 | | match details | ||
| 23.06.14 | 1st round | Yoshihito Nishioka | Issei Okamura | 6-0, 6-3 | | match details | Japan F8 | Clay |
| 02.06.14 | 1st round | Katsuki Nagao | Issei Okamura | 6-1, 7-67 | | match details | Japan F5 | Clay |
| 11.06.12 | 2nd round | Bumpei Sato | Issei Okamura | 6-4, 6-4 | | match details | Japan F5 | Clay |
| 11.06.12 | 1st round | Issei Okamura | Soichiro Moritani | 7-5, 6-1 | | match details |