 In 2015, the Japanese Supreme Court upheld the name-change law, ruling that it was not unconstitutional, noting that women could use informally their maiden names, and stating that it was the parliamentarians who should decide on whether to pass new legislation on separate spousal names.Traditionally, Korean women keep their family names after their marriage, but their children take the father's surname.In the premodern, people were extremely conscious of familial values and their own family identities.