Prefectures of Japan ranked by area as of October 1, 2015
Figures here are according to the official estimates of Japan. Ranks are given by estimated areas. Undetermined areas here account for domestic boundary regions either in uncertainty or disputed among Japanese prefectures.
Prefectures of Japan ranked by area as of January 1, 1883
population for January 1, 1883 was calculated based on information of . Areas were calculated based on maps drawn by Inō Tadataka. Ranks are given by estimated areas.