His lineage can be traced back to the Mori clan, whose ancestor is MINAMOTO no Yoshitaka, a seventh (or sixth) son of MINAMOTO no Yoshiie, who was the head of the Kawachi-Genji (Minamoto clan), one of the branches of the Seiwa-Genji (Minamoto clan).
家系は清和源氏のひとつ河内源氏の棟梁源義家の七男（六男とも）源義隆を祖とする森氏。