Etymology and distribution of 三千.

Sanzen 【三千】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Iwate-ken , Nagasaki-ken , Ibaraki-ken . 菅原 surname available. Iwate-ken Kesen-gun Sumita-chou It was in the Edo Period as a wild rice field warrior . Nagano-ken Shimoina-gun Ooshika-mura We tell you that it is a pioneer in Okawara. 菅原 Sugawara reference.