Ginjiro Shigeoka (重岡銀次朗, Shigeoka Ginjiro; born 18 October 1999) is a Japanese former professional boxer who held the…Ginjiro Shigeoka (重岡銀次朗, Shigeoka Ginjiro; born 18 October 1999) is a Japanese former professional boxer who held the International Boxing Federation (IBF) mini-flyweight title from 2023 to 2024.
Yudai Shigeoka (Japanese: 重岡優大, Shigeoka Yudai; born 16 April 1997) is a Japanese former professional boxer who held…Yudai Shigeoka (Japanese: 重岡優大, Shigeoka Yudai; born 16 April 1997) is a Japanese former professional boxer who held the World Boxing Council (WBC) mini-flyweight title from 2023 to 2024. As of November 2023, he is ranked as the world's best active mini-flyweight by BoxRec.
Seiya Tsutsumi (堤聖也) (born December 24, 1995) is a Japanese professional boxer. He is a two-time World Boxing…Seiya Tsutsumi (堤聖也) (born December 24, 1995) is a Japanese professional boxer. He is a two-time World Boxing Association (WBA) bantamweight champion having held the title since December 2025 until May 2026. and previously from 2024 to 2025.
Nobuhiro Ishida (石田 順裕, Ishida Nobuhiro; born August 18, 1975) is a Japanese former professional boxer. He is a former…Nobuhiro Ishida (石田 順裕, Ishida Nobuhiro; born August 18, 1975) is a Japanese former professional boxer. He is a former WBA interim super welterweight champion who is best known for knocking out James Kirkland in a middleweight bout at the MGM Grand Las Vegas in April 2011. Ishida has so far been promoted by Canelo Promotions and Golden Boy Promotions among others and has been co-trained by Rudy Hernández and Daisuke Okabe, while residing back and forth between Los Angeles, California, United States and Osaka, Japan.
Kazuo Kobayashi (小林 和男, Kobayashi Kazuo; born October 10, 1949 – November 17, 2020), better known as Royal Kobayashi…Kazuo Kobayashi (小林 和男, Kobayashi Kazuo; born October 10, 1949 – November 17, 2020), better known as Royal Kobayashi, was a Japanese boxer who competed at the 1972 Munich Olympic Games in the featherweight division, and won the WBC junior featherweight titles in 1976. He is an alumnus of the Takushoku University.