Country
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Japan
18.04.97, 28 years
18.04.97, 28 years
Kazuma Kawachi vs. Naoto Kai - head to head matches
| 07.03.16 | q 1 | Kazuma Kawachi | Naoto Kai | 4-6, 6-3, 6-4 | match details |  Japan F1 | Hard |
Kazuma Kawachi form & Naoto Kai form
Kazuma Kawachi - last matches
 M15 Villahermosa - I. hard | ||||
| 07.05.25 1st round | vs. Juan Carlos Manuel Aguilar | 0-6, - Kazuma Kawachi - retired |  | match details |
| M15 Osaka - Hard | ||||
| 22.04.25 1st round | vs. Hikaru Shiraishi | 6-4, 3-6, 1-6 | | match details |
| 21.04.25 qual. | vs. Yuhei Kono | 6-3, 6-1 |  | match details |
| 20.04.25 q 1 | vs. Riku Ooshima | 6-0, 6-0 | | match details |
| M15 Osaka - Hard | ||||
| 16.04.25 1st round | vs. Hoyoung Roh | 3-6, 6-4, 2-6 | | match details |
| 15.04.25 qual. | vs. Ren Nakamura | 6-2, 6-2 | | match details |
| 14.04.25 q 1 | vs. Antoine Voisin | 6-0, 6-2 | | match details |
| M15 Kashiwa - Hard | ||||
| 30.03.25 q 1 | vs. Riku Takahata | 6-3, 4-6, 4-10 | | match details |
 M25 Swan - Grass | ||||
| 19.03.25 1st round | vs. Noah Brownrigg | 4-6, 4-6 | | match details |
| M25 Mildura - Grass | ||||
| 12.03.25 1st round | vs. Duje Markovina | 2-6, 6-4, 4-6 | | match details |
| M15 Yanagawa - Hard | ||||
| 30.10.24 1st round | vs. Kazuki Sugimoto | 2-6, 2-2, - Kazuma Kawachi - retired | | match details |
| M15 Tanagura - Hard | ||||
| 22.10.24 1st round | vs. Yuto Oki | 1-6, 4-6 | | match details |
 Guangzhou Challenger - Hard | ||||
| 08.09.24 q 1 | vs. Kris Van Wyk | 4-6, 0-6 | | match details |
 M15 Tashkent - Hard | ||||
| 05.09.24 2nd round | vs. Zura Tkemaladze | 5-7, 2-6 | | match details |
| 04.09.24 1st round | vs. Valentin Kopeikin | 6-3, 7-5 | | match details |
| M15 Tashkent - Hard | ||||
| 30.08.24 1/4 | vs. Dominik Palan | 2-6, 0-6 | | match details |
| 29.08.24 2nd round | vs. Daniel Khazime | 6-4, 7-5 | | match details |
| 27.08.24 1st round | vs. Daniil Golubev | 6-0, 6-3 | | match details |
 M15 Nakhon - Hard | ||||
| 10.07.24 1st round | vs. Daisuke Sumizawa | 6-71, 7-63, 2-6 | | match details |
 M15 Ust - Hard | ||||
| 05.07.24 1/4 | vs. Egor Agafonov | 4-6, 6-2, 4-6 | | match details |
| 04.07.24 2nd round | vs. Maksim Shin | 6-3, 0-6, 6-2 | | match details |
| 03.07.24 1st round | vs. Daniel Ibragimov | 6-2, 6-4 | | match details |
| M15 Ust - Hard | ||||
| 27.06.24 2nd round | vs. Sergey Fomin | 2-6, 2-6 | | match details |
| 26.06.24 1st round | vs. Timur Maulenov | 6-1, 6-2 | | match details |
 M15 Hong - Hard | ||||
| 19.06.24 1st round | vs. Thanapet Chanta | 2-6, 6-1, 2-6 | | match details |
 M15 Harmon - Hard | ||||
| 06.06.24 2nd round | vs. Kokoro Isomura | 6-4, 6-79, 0-3, - Kazuma Kawachi - retired | | match details |
| 05.06.24 1st round | vs. Ko Suzuki | 6-3, 6-3 | | match details |
| M15 Karuizawa - Clay | ||||
| 29.05.24 1st round | vs. Masamichi Imamura | 4-6, 4-6 | | match details |
 M25 Addis - Clay | ||||
| 23.05.24 2nd round | vs. Eliakim Coulibaly | 0-6, 3-6 | | match details |
| 22.05.24 1st round | vs. Julian Desousa | 6-1, 2-6, 7-65 | | match details |
Naoto Kai - last matches
| Yokohama Challenger - Hard | ||||
| 25.02.19 1st round | vs. Cheong-Eui Kim | 1-6, 3-6 | | match details |
| Japan F1 - Hard | ||||
| 06.03.18 qual. | vs. Rio Noguchi | 1-6, 6-4, 2-6 | | match details |
| 04.03.18 q 2 | vs. Kaito Itsusaki | 6-77, 6-2, 6-3 | | match details |
| 03.03.18 q 1 | vs. Kosuke Okagaki | 4-6, 6-0, 6-2 | | match details |
| Yokohama Challenger - Hard | ||||
| 23.02.18 q 1 | vs. Takanyi Garanganga | 3-6, 6-4, 6-75 | | match details |
| Japan F8 - Carpet | ||||
| 12.06.17 q 1 | vs. Steven Goh | 3-6, 2-6 | | match details |
| Japan F7 - Hard | ||||
| 06.06.17 1st round | vs. Shintaro Imai | 1-6, 2-6 | | match details |
| Japan F6 - Clay | ||||
| 29.05.17 q 1 | vs. Ibuki Furuta | 2-6, 0-6 | | match details |
| Japan F4 - Hard | ||||
| 27.03.17 q 1 | vs. Yuki Nakamura | 4-6, 6-4, 1-6 | | match details |
| Japan F1 - Hard | ||||
| 06.03.17 q 1 | vs. Ibuki Furuta | 2-6, 0-6 | | match details |
| Japan F8 - Carpet | ||||
| 13.06.16 q 1 | vs. Masakatsu Noguchi | 0-6, 2-6 | | match details |
| Japan F7 - Hard | ||||
| 05.06.16 1st round | vs. Ryota Tanuma | 4-6, 3-6 | | match details |
| Japan F4 - Hard | ||||
| 28.03.16 q 1 | vs. Gengo Kikuchi | 2-6, 6-71 | | match details |
| Japan F1 - Hard | ||||
| 07.03.16 q 1 | vs. Kazuma Kawachi | 6-4, 3-6, 4-6 | | match details |
| Japan F8 - Clay | ||||
| 22.06.15 q 1 | vs. Motoaki Kita | 3-6, 3-6 | | match details |
| Japan F7 - Carpet | ||||
| 15.06.15 q 1 | vs. Keisuke Numajiri | 2-6, 3-6 | | match details |