/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Takuma Inoue | 24 Nov 2025 | Current | 331 |
| Junto Nakatani | 24 Feb 2024 | 18 Sept 2025 | 572 |
| Alexandro Santiago | 29 Jul 2023 | 24 Feb 2024 | 210 |
| Naoya Inoue | 7 Jun 2022 | 13 Jan 2023 | 220 |
| Nonito Donaire | 29 May 2021 | 7 Jun 2022 | 374 |
| Nordine Oubaali | 19 Jan 2019 | 13 Nov 2020 | 664 |
| Luis Nery | 15 Aug 2017 | 28 Feb 2018 | 197 |
| Shinsuke Yamanaka | 6 Nov 2011 | 15 Aug 2017 | 2,109 |
| Fernando Montiel | 30 Apr 2010 | 19 Feb 2011 | 295 |
| Hozumi Hasegawa | 16 Apr 2005 | 30 Apr 2010 | 1,840 |
| Veeraphol Sahaprom | 29 Dec 1998 | 16 Apr 2005 | 2,300 |
| Joichiro Tatsuyoshi | 22 Nov 1997 | 29 Dec 1998 | 402 |
| Wayne McCullough | 30 Jul 1995 | 11 Jan 1997 | 531 |
| Yasuei Yakushiji | 23 Dec 1993 | 30 Jul 1995 | 584 |
| Victor Rabanales | 17 Sept 1992 | 28 Mar 1993 | 192 |
| Joichiro Tatsuyoshi | 19 Sept 1991 | 17 Sept 1992 | 364 |
| Raúl Pérez | 29 Oct 1988 | 25 Feb 1991 | 849 |
| Alberto Dávila | 1 Sept 1983 | 23 Mar 1985 | 569 |
| Lupe Pintor | 3 Jun 1979 | 9 Jul 1983 | 1,497 |
| Rodolfo Martínez | 7 Dec 1974 | 8 May 1976 | 518 |
| Rodolfo Martínez | 14 Apr 1973 | 7 Dec 1974 | 602 |
| Enrique Pinder | 29 Jul 1972 | 5 Jan 1973 | 160 |
| Rubén Olivares | 2 Apr 1971 | 19 Mar 1972 | 352 |
| Chucho Castillo | 16 Oct 1970 | 2 Apr 1971 | 168 |
| Rubén Olivares | 22 Aug 1969 | 16 Oct 1970 | 420 |
| Lionel Rose | 27 Feb 1968 | 22 Aug 1969 | 542 |
| Fighting Harada | 18 May 1965 | 27 Feb 1968 | 1,015 |
| Éder Jofre | 4 Apr 1963 | 18 May 1965 | 775 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.