| Nationality | Name | Wins | Losses |
|---|---|---|---|
| Nationality | Name | Wins | Losses |
| Dutch | Leroy Kaestner | 33 | 6 |
| Japanese | Kona Kato | 7 | 4 |
| Anuwat Kaewsamrit | 108 | 38 | |
| Japanese | Nobuaki Kakuda | 11 | 5 |
| South African | Virgil Kalakoda | 10 | 10 |
| Dutch | Rob Kaman | 97 | 12 |
| Japanese | Shoki Kaneda | 19 | 3 |
| Japanese | Akihiro Kaneko | 17 | 2 |
| Japanese | Tsubasa Kaneko | 11 | 4 |
| French | Florent Kaouachi | 15 | 3 |
| Ruslan Karaev | 15 | 9 | |
| Armenian Dutch | Karapet Karapetyan | 43 | 13 |
| Iranian | Sina Karimian | 15 | 2 |
| Polish | Dawid Kasperski | 17 | 8 |
| Japanese | Yuki Kasahara | 25 | 3 |
| French | Hisaki Kato | 5 | 5 |
| Japanese | Yugo Kato | 23 | 5 |
| Japanese | Taiga Kawabe | 26 | 13 |
| Japanese | Ryuji Kajiwara | 25 | 13 |
| Japanese | Kyo Kawakami | 12 | 7 |