Combattants Japon
| 51 |  | Juntarou Ushiku | 0-1-0 REC | #7231 |  |
| 52 |  | Junya Hibino | 0-1-0 REC | #6954 | |
| 53 |  | Juri Ohara | #7448 | | |
| 54 |  | Jutaro Nakao | 1-1-0 UFC | #4683 | |
| 55 |  | Kai Asakura | 0-2-0 UFC | #776 | |
| 56 |  | Kai Yoshida | 0-1-0 REC | #4776 | |
| 57 |  | Kaito Oda | #7720 | | |
| 58 |  | Kana Watanabe | 3-4-0 REC | #2421 | |
| 59 |  | Kanako Murata | 1-2-0 UFC | #4145 | |
| 60 |  | Kanna Asakura | 0-1-0 REC | #6500 | |
| 61 |  | Katsuhisa Fujii | 1-1-0 UFC | #5325 | |
| 62 |  | Katsunori Kikuno | 2-3-0 UFC | #3232 | |
| 63 |  | Katsuyoshi Sasaki | 0-1-0 REC | #6872 | |
| 64 |  | Kazuhiro Nakamura | 0-2-0 UFC | #4708 | |
| 65 |  | Kazuki Aimoto | #7612 | | |
| 66 |  | Kazuki Tokudome | 1-3-0 UFC | #3818 | |
| 67 |  | Kazuma Maruyama | 0-1-0 REC | #6613 | |
| 68 |  | Kazumasa Majima | 2-1-0 REC | #364 | |
| 69 |  | Kazuo Takahashi | 1-0-0 UFC | #5090 | |
| 70 |  | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3665 | |
| 71 |  | Keigo Kunihara | 0-1-0 UFC | #6909 | |
| 72 |  | Keiichiro Nakamura | 3-0-0 REC | #724 | |
| 73 |  | Keiichiro Yamamiya | 0-1-0 UFC | #6875 | |
| 74 |  | Keisuke Sasu | 1-3-0 REC | #3419 | |
| 75 |  | Keita Nakamura | 4-7-0 UFC | #2216 | |