Hiroshi Kobayashi (小林 弘, Kobayashi Hiroshi, born 23 August 1944 in Gunma, Japan) is a former professional boxer who held the world junior lightweight championship.
Kobayashi turned pro in 1962 and won the Lineal, WBC and WBA Super Featherweight Title in 1967 by defeating Yoshiaki Numata by 12th-round KO in a bout where Numata was down once in the 6th and three times in the 12th round.
[1] Kobayashi was stripped of his WBC title on 20 January 1969 after failing to go through with an agreed rematch with Rene Barrientos.
(There first fight ended in a contentious draw) Kobayashi defended the title six times before losing the belt to Alfredo Marcano in 1971.
[2] He retired later in the year, after losing by knockout in the 7th round against Roberto Durán in Panama.