Japanese maps define Dokdo as Korean territory Posted : 2021-02-19 22:23 Updated : 2021-02-20 09:06 The Dokdo Foundation said it has secured the undisputed evidence to deny Tokyo's territorial claim to Dokdo. Yonhap As many as 200 ancient Japanese maps have been confirmed to mark Dokdo in the East Sea as Korean territory, a government-funded foundation here said Friday. The Dokdo Foundation said it has secured the undisputed evidence to deny Tokyo's territorial claim to Dokdo after examining some 1,000 old maps owned by various local institutions, including the National Assembly Library, the Northeast Asian History Foundation and the National Map Museum run by the National Geographic Information Institute.