Ioka 【伊岡】2 The Japanese surnames etymology dictionary.
② Niigata-ken Kashiwazaki-shi Nishiyama-machi Ikeura is a place name with a record since the Edo period. Aki Momoyama period in the Niigata-ken , Fukushima-ken Date-shi Yanagawa Town Tsuruokaoka was a clan officer , Hokkaidou Oshimashi-chou Matsumae-chou Matsushiro was in the Edo period in the Clan Matsumae of the Clan office.
③ Topography . From the pond. There is an example where Ura means "back". Wakayama-ken Iwade-shi Kaneike is a place name with a record since the Edo period. It is based in the same place. Good neighbor . Oosaka-fu Izumisano-shi Tsuruhara is based.