Etymology and distribution of 豊古.

Toyofuru 【豊古】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Hokkaidou . Ainu system . Hokkaidou Hidakashi-chou Biratori-chou Origin of vegetables (Nina). A place name with a record in the notation of "Nina" during the Edo period. Nina of the Ainu language means "flounder".

* There was a case called Mr. Inage in the West Party of the Musashi Nanbu who made the vicinity of Toukyou-to Hino-shi as the basis for the Heian period and the Kamakura period. 稲毛 Inage reference.