Itai 【板井】5 The Japanese surnames etymology dictionary.
① Topography . From city and mountains. Nagasaki-ken Iki-shi Gonogura Town Wakamatsu Tohto, Toyama-ken Tonami-shi Takahi is based. Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era in the Kaga clan of the Clan government office, Oosaka-fu Oosaka-shi Nishiyodogawa ku Nakajima. Good neighbor . Nara-ken Yamatokooriyama-shi Nishitanaka cho is based.
③ Topography . "Mountain" added to the city which is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. Kagoshima-ken Ooshima-gun Yoron-chou There is distribution in tea flowers. Where she in the 市 there last name. 市 reference.