The island was administered as part of Shimushu District of Nemuro Subprefecture of Hokkaidō.
['administered', 'as']
['The', 'island', 'was', 'administered', 'as', 'part', 'of', 'Shimushu', 'District', 'of', 'Nemuro', 'Subprefecture', 'of', 'Hokkaidō.']