Mitsuko Tokoro (所 美都子, Tokoro Mitsuko, January 3, 1939 – January 27, 1968), also known by her pen name Mimie Tomano, was a Japanese biologist and New Left activist remembered as one of the leading theorists of the apolitical and radically anti-hierarchical Zenkyōtō movement that carried out the 1968-69 Japanese student uprisings at universities across Japan.