Etymology and distribution of 岩成.

Iwanari 【岩成】^{レベル4
About 1,500}  The Japanese surnames etymology dictionary.

Okinawa-ken Uruma-shi . Thing . From the day of the Ox. Okinawa-ken Naha-shi Tell him that he was standing at Shuri Castle in Shuri Kinjo Town on the day of the Ox in the Ryukyu Kingdom era.