The name of the school originated from the fact that Tsunetaka KASUGA, a grandson of Takayoshi KASUGA who was famous as the author of Genji monogatari emaki (Illustrated Handscroll of the Tale of Genji), left Nara, moved in Kyoto, served in the Imperial court, and was appointed as Tosa no Gon no kami (Provisional Governor of Tosa Province).
源氏物語絵巻の筆者として名高い春日隆能の孫、春日経隆が、奈良を去って、京都に移り朝廷に仕えて、土佐権守に任じられたことに由来する。