The prefectures of Japan are the country's 47 sub-national jurisdictions: one "metropolis" (都; To), Tokyo; one "circuit" (道; Dō), Hokkaidō; two urban prefectures (府; Fu), Osaka and Kyoto; and 43 other prefectures (県; Ken). In Japanese, they are commonly referred to collectively as Todōfuken (都道府県).

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