/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Siyakholwa Kuse | 16 May 2026 | Current | 157 |
| Melvin Jerusalem | 31 Mar 2024 | 16 May 2026 | 776 |
| Yudai Shigeoka | 7 Oct 2023 | 31 Mar 2024 | 176 |
| Xiong Chaozhong | 24 Nov 2012 | 5 Feb 2014 | 438 |
| Kazuto Ioka | 11 Feb 2011 | 1 Jul 2012 | 506 |
| Oleydong Sithsamerchai | 29 Nov 2007 | 11 Feb 2011 | 1,170 |
| Isaac Bustos | 18 Dec 2004 | 4 Apr 2005 | 107 |
| José Antonio Aguirre | 11 Feb 2000 | 10 Jan 2004 | 1,429 |
| Wandee Singwangcha | 28 Sept 1999 | 11 Feb 2000 | 136 |
| Ricardo López | 25 Oct 1990 | 28 Sept 1999 | 3,260 |
| Choi Jum-hwan | 12 Nov 1989 | 7 Feb 1990 | 87 |
| Napa Kiatwanchai | 13 Nov 1988 | 12 Nov 1989 | 364 |
| Hiroki Ioka | 18 Oct 1987 | 13 Nov 1988 | 392 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
