The Tosa school is a school whose Ryuso (a founder of school, an originator) was KASUGA no Motomitsu, a disciple of KOSE no Kinmochi of the Kose school and produced many famous painters.
巨勢派の巨勢公望の門人春日基光を流祖とし、数々の名手を世に送り出した流派。