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Worldwide, Казуко (Kazuko , Казуко ) is quite a common principally female, but scarcely boy's forename. The first name Казуко is habitual in Japan, where it is quite a rare girly name, the United States, where it is a rare feminine name, and Australia. In absolute terms, the name is most common in Japan, the United States, and China. Very seldom, Казуко is the last name as well as the forename.
Казуко is also a name for the fictitious and mythical characters: Kazuko , the 2011 film Guilty of Romance character.