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.
* Bolded letters in the competitor's name indicate the surname/family name.
Kiyokawa Yūya
2014-12-23
Tōkyō
Defeats KING Kōhei to become the first REBELS-MUAYTHAI champion; retires on 16-12-22.
Yagami Kenta
2017-04-16
Tōkyō
Defeats Sakuragi Takahiro; vacates on 19-04-20 after losing a non-title match.
Yasumoto Haruto
2019-06-09
Tōkyō
Defeats Kuriaki Shōgo; renamed REBELS-RED title in 19-12; renamed KNOCK OUT-RED title in 21-03; also wins WPMF World Title on 21-01-04 and WBC MuayThai Japan National Title on 21-09-19; vacates on 22-07-28 after signing with RISE.
