Imai 【今井】7 The Japanese surnames etymology dictionary.
Ooita-ken , Fukuoka-ken . 岩尾 Surname present. In Ooita-ken Usa-shi , Mr. Yamada tells that he added "stone" to the lower part of the mountain and "power" under the rice after the disturbance of the warrant of 1156 (Yuan Yuan). 山田 reference. Ooita-ken Bungotakada-shi (formerly Iwao name) is a geographical name with a record in the North-South morning era.