Hiroshi Kobayashi, is a former professional boxer

Boxing

Boxing, also called pugilism, is a combat sport in which two people fight each other using their fists. Boxing is supervised by a referee over a series of between one to three minute intervals called rounds...

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Kobayashi turned pro in 1962 and won the WBC and WBA Super Featherweight Title in 1967 by defeating Yoshiaki Numata

Yoshiaki Numata

Yoshiaki Numata is a former world Junior Lightweight boxing champion.Numata turned professional in 1962 and won the WBC and WBA super featherweight world titles by defeating Flash Elorde by decision in 1967, although Numata was knocked down in the 3rd round. He lost the title in his first...

 by 12th round KO, in a bout where Numata was down once in the 6th and three times in the 12th roundand so becoming the undisputed featherweight champion of the world. He was stripped of his WBA title after failing to fight Rene Barrientos.
He defended the title six times before losing the belt to Alfredo Marcano

Alfredo Marcano

Alfredo Marcano was a Venezuelan professional boxer. During his career, which spanned from 1966 to 1975, Marcano won the WBA World super featherweight title. Marcano challenged for the WBA title on July 29, 1971 against Hiroshi Kobayashi. The fight took place in Japan—the home country of the...

 in 1971. He retired later in the year after losing by knockout in the 7th round to a young Roberto Durán

Roberto Durán

Roberto Durán Samaniego is a retired professional boxer from Panama, widely regarded as one of the greatest boxers of all time. A versatile brawler in the ring, he was nicknamed "Manos de Piedra" during his career....

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