The Japanese surnames etymology dictionary.
Oosaka-fu Oosaka-shi · Oosaka-fu Takatsuki-shi . Origin of Oosaka-fu Han'nan-shi Natural field (Jinanda). A place name with a record since the Edo period. Oosaka-fu at Oosaka-fu South of southwestern part (formerly Izumi-kuni) It is a place of comparison of tradition to be taken from a land with a potato.