Combattants Japon
| 251 |  | Yoshitomi Mishima | 0-2-0 UFC | #5761 |  |
| 252 |  | Yoshiyuki Yoshida | 2-3-0 UFC | #3483 | |
| 253 |  | Yota Hayashi | 1-0-0 REC | #852 | |
| 254 |  | Yuga Nakaya | 1-0-0 REC | #3578 | |
| 255 |  | Yuhei Tsuda | 1-0-0 REC | #3133 | |
| 256 |  | Yuito Yanagawa | 0-1-0 REC | #5626 | |
| 257 |  | Yuji Yannick Ephoeviga | 0-1-0 REC | #5427 | |
| 258 |  | Yuki Ito | 5-2-0 REC | #239 | |
| 259 |  | Yuki Kawana | 0-3-0 REC | #6433 | |
| 260 |  | Yuki Kondo | 1-2-0 UFC | #3695 | |
| 261 |  | Yuki Motoya | 5-3-0 REC | #1501 | |
| 262 |  | Yuki Narita | 0-1-0 REC | #5779 | |
| 263 |  | Yukito Morinaga | 1-0-0 REC | #2982 | |
| 264 |  | Yuma Horiuchi | 0-1-0 REC | #7233 | |
| 265 |  | Yumeto Mizuno | #8050 | | |
| 266 |  | Yunosuke Minami | 0-1-0 REC | #5885 | |
| 267 |  | Yura Naito | 0-1-0 REC | #4994 | |
| 268 |  | Yuri Suda | 0-1-0 REC | #6590 | |
| 269 |  | Yusaku Kinoshita | 0-2-0 UFC | #3662 | |
| 270 |  | Yushi Sakura | 1-0-0 REC | #4423 | |
| 271 |  | Yushin Okami | 14-7-0 UFC | #256 | |
| 272 |  | Yusuke Kasuya | 0-2-0 UFC | #4052 | |
| 273 |  | Yusuke Yachi | 3-3-0 REC | #1056 | |
| 274 |  | Yuta Kubo | 0-2-0, 1NC REC | #3575 | |
| 275 |  | Yuta Sasaki | 4-5-0 UFC | #2224 | |