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.
New Japan Kickboxing Federation
Flyweight Title [50.8kg]
(as of 2020-12-04)
* Bolded letters in the competitor's name indicate the surname/family name.
Sasaki Kōsuke
1996-10-06
Tōkyō
Becomes the first champion.
Yasukawa Ken
1997-08-10
Vacates in 99.
Sasaki Kōsuke [2]
2000-11
Awarded; vacant in 01-07 when NJKF joins NKB (Nihon Kick Boxing).
Kawazu Shin'ichi
2002-07-14
Tōkyō
Defeats Karasawa Takumi to become the first NKB champion; vacates in 03-10.
Takahashi Takuya
2003-11-09
Tōkyō
Defeats Satō Tomonori; vacant in 14-12 when NJKF leaves NKB.
Takahashi Takuya [2]
2015-01
Continues to be recognized by NJKF but as a separate reign.
TOMONORI (Satō Tomonori)
2006-04-09
Kurashiki, Okayama
Vacates in 07.
Kubo Kenji
2007-09-02
Tōkyō
Defeats Lee Hi-do (? Korean name written "イー・ヒード" in Japanese) for the vacant title; vacates in 08-10; Nakanishi Yūsuke loses to Seki Masataka on 09-01-25 in Tōkyō with a stipulation that the title is awarded only if Nakanishi wins.
Takashi SaenchaiGym
2013-02-17
Tōkyō
Defeats Nimo.
Nimo
2014-04-13
Tōkyō
Vacant in 15 (sometime after 15-08-29).
Yamashita Spankey Hiroshi
2016-02-21
Tōkyō
Defeats Ōtsuki Naoki; vacant in 16 (sometime after 16-08-12).
Noto Tatsuya
2016-10-30
Tōkyō
Defeats Ōta Takuma for the vacant title; vacates in 18 (sometime after 18-02-14).
