Family name ゆみこ (Yumiko 
, ゆみこ) , in all the world, is quite a rare surname. The last name ゆみこ is characteristic of Hong Kong, where it is a rare surname, Japan, and Indonesia. Not in comparison with a country's population, it is the most numerous in Indonesia, China, and Japan. More frequently, ゆみこ is the forename as well as the last name.