Strawweight
| Name | Reign period | No. of successful defenses |
| Hiroki Ioka | October 18, 1987 – November 13, 1988 | 2 |
| Napa Kiatwanchai | November 13, 1988 – November 12, 1989 | 2 |
| Jum-Hwan Choi | November 12, 1989 – February 7, 1990 | 3 |
| Hideyuki Ohashi | February 7, 1990 – December 25, 1990 | 1 |
| Ricardo López | October 25, 1990 – September, 1999 (stripped) | 21 |
| Wandee Singwancha | September, 1999 – February 11, 2000 (elevated from interim status) | 1 |
| José Antonio Aguirre | February 11, 2000 – January 10, 2004 | 7 |
| "Eagle" Den Junlapan | January 10, 2004 – December 18, 2004 | 1 |
| Isaac Bustos | December 18, 2004 – April 4, 2005 | 0 |
| "Eagle" Den Junlapan | August 6, 2005 – November 29, 2007 | 4 |
| Oleydong Sithsamerchai | November 29, 2007 – February 11, 2011 | 5 |
| Kazuto Ioka | February 11, 2011 – July 1, 2012 (vacated) | 4 |
| Vacant title Awarded to the winner of the Xiong Zhao Zhong vs. Javier Martinez Resendiz bout to be held on October 27, 2012. |
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Read more about this topic: List Of WBC World Champions