Yoshiaki Numata (沼田 義明, Numata Yoshiaki, born April 19, 1945 in Hokkaidō, Japan) is a former world Junior Lightweight boxing champion.
Numata turned professional in 1962 and won the Lineal, 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 defense to Hiroshi Kobayashi by KO in the 12th. Numata was down once in the 6th and three times in the 12th round.
In 1970 Numata captured the WBC super featherweight title with a decision over Rene Barrientos. He defended the title three times before losing the belt to Ricardo Arredondo in 1971. Numata retired a year later.