Masaaki Ikenaga (?? ??, Ikenaga Masaaki, born August 18, 1946, in Hohoku Town, Toyoura-gun, Yamaguchi, Japan) is a former Japanese professional baseball player.
A right-handed pitcher, he played in Japan for the Nishitetsu Lions.
Ikenaga was one of the top pitchers in Nippon Professional Baseball before a scandal derailed his career at age 23.
Before being implicated in the Black Mist Scandal, he made five consecutive All-Star teams at the beginning of his career, and was in the top 10 in ERA every season of his career.