Mihoko Iwaya (岩屋 美保子, Iwaya Mihoko, born June 1, 1964) is a former Japanese football player.
In June 1981, when she was 17 years old, she was selected for the Japan national team for the 1981 AFC Championship.
At this competition, on June 13, she debuted against Indonesia and Japan won this match (1-0).
She played two games for Japan, including that competition in 1981.
This biographical article related to women's association football in Japan is a stub.