Following the name of the champion(s): Indicates the number of times the competitor has held that title at that point.
[...]
Indicates a gap in the listing where title changes are not known.
<
Title was held or changed hands no later than this. In these cases, it is known that a competitor held the title at a certain time but not when he/she won it.
@
Order uncertain. Different titleholders may be known for the same year, for example, but it is not known who held the title before whom.
#
Unofficial or disputable claims. These are usually matches that certainly took place, but where there is doubt that the competitor shown should be recognized as a true title holder. These listings are also italicized.
Defeats Edwin Inocencio; wins WBA World Title on 85-12-08; Park Cho-woon and Little Bagui fight for the vacant titlt to a draw on 86-01-11 in Seoul, KOR.
Interim champion since defeating Yamanaka Tsutomu on 09-07-16 in Tōkyō, JPN; defeats Wadamine in unification match.
Miyazaki Ryō
2010-06-14
Tōkyō, JPN
Also holds Japanese Title but vacates it on 10-08-20; Vacates OPBF title in 12-10.
Ono Shin
2013-01-12
Tōkyō, JPN
Defeats Omari Kimweri; vacates on 13-09-06.
Inoue Naoya
2013-12-06
Tōkyō, JPN
Defeats Jerson Mancio; vacates on 14-02-28; wins WBC World Title on 14-04-06.
Jonathan Taconing
2014-03-25
Manila, PHI
Defeats Vergilio Silvano; vacates in 16-06.
Kenshirō (Teraji Kenshirō)
2016-08-07
Ōsaka, JPN
Defeats Ouchi Toshimasa; also holds Japanese Title; vacates both titles on 17-03-21; wins WBC World Title on 17-05-20; Edward Heno and Ogidō Seita fight for the vacant OPBF title to a draw on 17-05-21 in Nakagami, Okinawa, JPN.
