Etymology and distribution of 三枚地.

Sanmaiji 【三枚地】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Ibaraki-ken , Toukyou-to . Summary . Sugawara's abbreviation. Ibaraki-ken Kamisu-shi Hasaki is based. In the same town, a child of Sugawara Mamo who is a scholar and politician of the Heian period comes home and tells that he renamed "Kan" in order to disguise Sugawara surname. 菅原 Sugawara reference.