Cognomen みつこ (Mitsuko 
, みつこ) , across the world, is a rare last name. The surname みつこ is habitual in Japan, where it is a rare surname, Indonesia, and Malaysia, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Indonesia, Japan, and China. More frequently, みつこ is the forename as well as the last name.