Boxing: Inoue-Butler clash in Tokyo

Boxing: Inoue-Butler clash in Tokyo

Japanese boxer Naoya Inoue attends a press conference in Yokohama, near Tokyo, on Oct. 13, 2022. Ohashi Gym said the four-belt bantamweight unification fight between three-division champion Inoue and Britain's Paul Butler will take place at Ariake Arena in Tokyo on Dec. 13.

Boxing: Inoue-Butler clash in Tokyo

Boxing: Inoue-Butler clash in Tokyo

Japanese boxer Naoya Inoue attends a press conference in Yokohama, near Tokyo, on Oct. 13, 2022. Ohashi Gym said the four-belt bantamweight unification fight between three-division champion Inoue and Britain's Paul Butler will take place at Ariake Arena in Tokyo on Dec. 13.

Boxing: Inoue-Butler clash in Tokyo

Boxing: Inoue-Butler clash in Tokyo

Japanese boxer Naoya Inoue attends a press conference in Yokohama, near Tokyo, on Oct. 13, 2022. Ohashi Gym said the four-belt bantamweight unification fight between three-division champion Inoue and Britain's Paul Butler will take place at Ariake Arena in Tokyo on Dec. 13.

Boxing: Lomachenko-Nakatani lightweight bout

Boxing: Lomachenko-Nakatani lightweight bout

Former three-division boxing world champion Vasiliy Lomachenko (L) of Ukraine and Masayoshi Nakatani of Japan face off during an official weigh-in in Las Vegas, Nevada, on June 25, 2021, a day before their 12-round lightweight bout.

Boxing: Lomachenko-Nakatani lightweight bout

Boxing: Lomachenko-Nakatani lightweight bout

Former three-division world boxing champion Vasiliy Lomachenko (L) of Ukraine and Masayoshi Nakatani of Japan face each other during a press conference in Las Vegas, Nevada, on June 24, 2021, on their 12-round lightweight match to be held two days later.

Boxing: Floyd Mayweather in Japan

Boxing: Floyd Mayweather in Japan

Five-division boxing world champion Floyd Mayweather (2nd from L) poses for a photo in Tokyo on June 13, 2019, with WBA light flyweight super champion Hiroto Kyoguchi (L), three-division world champion Kazuto Ioka (2nd from R) and Miyo Yoshida, who will face WBO women's super flyweight champion Casey Morton of the United States on June 19 in Chiba, Japan. (Kyodo) ==Kyodo

Ioka retires from boxing

Ioka retires from boxing

Former three-division world champion Kazuto Ioka takes a deep bow after announcing his retirement from boxing Dec. 31, 2017, in Yokohama, Japan. (Kyodo) ==Kyodo

Ioka retires from boxing

Ioka retires from boxing

Former three-division world champion Kazuto Ioka announces his retirement from boxing at a press conference on Dec. 31, 2017, in Yokohama, Japan. (Kyodo) ==Kyodo