Etymology and distribution of 青墳.

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

Okinawa-ken . Okinawa-ken Zamami village Shimajiri gun Aka is a place name with a record since the Kingdom of the Ryukyus. Ryukyu sound is also red. Okinawa-ken Shimajiri-gun Kumejima-chou Aka is a place name with a record since the Kingdom of the Ryukyus. Ryukyuan sound is Arka.