Etymology and distribution of 世来.

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

Hokkaidou , Miyagi-ken , Chiba-ken . Fukushima-ken Date-shi Originated from Hodara - machi near Toda (old: 48th school). Place name unknown record era. Miyagi-ken Igu-gun Marumori-machi A place of comparison of tradition in Ouchi Ueda - bashi. The place name is estimated from hanging the spirit between this world and the Pure Land over forty-nine days with 'Seirei (Tsurushiti)' by estimating that it multiplies by seven and seven.

※ Mie-ken Iga-shi originated in the city of Shiju. A place name with a record since the Edo period. The place name tells that the row base of the monk of the Nara era built the 49th house and was called "the 49th house".