Kosei Tanaka

Kosei Tanaka is a Japanese professional boxer. He is a three-weight world champion, having held the WBO mini-flyweight title from 2015 to 2016; the WBO junior-flyweight title from 2016 to 2017; and the WBO flyweight title from 2018 to 2020. 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 Vasyl Lomachenko, he is also the fastest ever fighter to win titles in three weight-classes, having accomplished the feat in only 12 bouts.