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, if any, indicate the surname/family name.
Okamoto Fuji
1924-04-26
Tōkyō
Defeats Onoda Kōhei to be recognized as the first champion by Nippon Kentō Club; may vacate in 24.
Okamoto Fuji [2?]
1924-07-26
Tōkyō
Defeats Sanada Shichisaburō (to defend the title?); still champion as of 24-09-28.
Hiraiwa Hiroshi
1920s
Recognized by Teiken in opposition to Nippon Kentō Club.
Kashiwamura Gorō
1927-06-05
Tōkyō
Defeats Mori Jūbei for the Dai Nippon Kentōkai championship; also wins Meiji Shrine championship on 27-11-03.
Kondō Iwao
1928-11-04
Tōkyō
Kashiwamura Gorō [2]
1930-04-19
Tōkyō
Has also won the Meiji Shrine championship, defeating Nakagawa Eiji on 29-11-03.
[…]
Umeno Hayashi
1933-05-23
Defeats Hasegawa Yoshihiro to become the Japanese representative for the Japan-vs-France competitions; 9th champion.
Hanada Yōichirō
1934-12-25
Tōkyō
Defeats Itō Isamu in the All Japan championship; still champion as of 37-03-06; title most likely inactive during the 2nd Sino-Japanese War/WWII; Hanada again defends the title on 47-09-01.
Shirai Yoshio
1949-01-28
Tōkyō
Also wins the bantamweight title on 49-12-15; recognized by the Japan Boxing Commission upon its inception on 52-04-21; becomes the first Japanese to win the World Title on 52-05-19; vacates Japanese flyweight title on 52-08-05 and bantamweight title on 52-08-25.
