Etymology and distribution of 岡玉.

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

Toyama-ken Toyama-shi . Summary . Abbreviation for blacksmith. Toyama-ken Toyama-shi In Yao-cho Ida, it was renamed before 1945 on the grounds that there was a misdelivery of mail by the same name by the smith last name and same name. 鍛冶 Kaji reference.