Shoji Oguma (大熊 正二 born July 22, 1951) is a Japanese former professional boxer who held the WBC and Lineal titles in the Flyweight division.

Oguma turned pro in 1970 and in 1974 won the WBC Flyweight Title by winning a split decision over Betulio González.

In 1978 he landed a rematch with WBC Flyweight champion Canto but came up short with a split decision loss.

Later that year he fought his third bout with Canto, and this time lost a more clear unanimous decision to complete their trilogy.

In 1981 Oguma defended the titles successfully again against Park, but lost the belts in his following bout by KO to Antonio Avelar.