Etymology and distribution of 岩玉.

Iwatama 【岩玉】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Kyouto-fu Kyouto-shi , Miyazaki-ken Saito-shi , Yamaguchi-ken . There is a 歌田 surname. Hyougo-ken There is a record in Kamigetsu- cho Kamizuki-gun in 1578 (Tensho 6th year). Yamaguchi-ken Shimonoseki-shi Choshu Miyazaki Town was in Edo period in the Chosun Son of the Clan office. 歌田 Utada reference.