Kosei Tanaka
Japanese boxer
田中恒成 · 다나카 고세이
- Born
- 15 June 1995, Tajimi
- Citizenship
- Japan
- Sport
- boxing
- Discipline
- minimumweight
- Occupation
- boxer
- Height
- 164 cm (5 ft 5 in)
Kosei Tanaka (田中 恒成, Tanaka Kōsei; born 15 June 1995) is a Japanese former professional boxer who competed from 2013 to 2024. He is a four-weight world champion, having held the World Boxing Organization (WBO) mini-flyweight title from 2015 to 2016; the WBO junior-flyweight title from 2016 to 2017; the WBO flyweight title from 2018 to 2020; and the WBO junior-bantamweight title in 2024. Upon winning his first world title in only his fifth bout, he became the fastest Japanese fighter ever to become a world champion. Along with Vasiliy Lomachenko, he is also the fastest ever male fighter to win titles in three weight-classes, having accomplished the feat in only 12 bouts. He also surpassed Oscar De La Hoya to become the fastest male four division champion, setting the bar at 21 fights.
Awards and honours
- WBO World Flyweight Champion
- WBO World Junior Bantamweight Champion
- WBO World Junior Flyweight Champion
- WBO World Mini Flyweight Champion
External links
Facts from Wikidata Q18638075 (CC0); quoted introduction from English Wikipedia (CC BY-SA 4.0). Data retrieved 2026-10-22.
Data: Wikidata (CC0 1.0); Wikipedia (English) (CC BY-SA 4.0). Retrieved 2026-10-22.