Izu Province
Other prefectures only existed under the fu/han/ken system. For example, Nirayama-ken replaced the Nirayma daikan, the shogunate administrator of shogunate possessions in Izu, Suruga, Sagami and Musashi provinces, seated in Nirayama in Izu Province. Its main part was merged into Ashigara Prefecture in 1871/72 while exclaves went to other prefectures. Since the 1880s, Nirayama's former territory is split between Shizuoka, Yamanashi, Tokyo, Kanagawa and Saitama.