Etymology and distribution of 平才.

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

Shimane-ken Masuda-shi , Yamaguchi-ken . Creation . Tells you from "Yayori" which is the kanji notation of "Noi heavy" of "The snowy heavy fountain falling today in the early spring of the beginning of the new year" by the owner of the Nara era at the end of the "Manyo Shu" . Location unknown. "Wonderful things overlap." 大伴 Ootomo reference.

* In Shimane-ken western part (formerly: Iwami-kuni) there is a transmission with Mr. Futarumi's descendant. 重富 Shigetomi reference.