Mototsuna was in fact killed in the Onin War, but some historical materials created during early-modern times such as the 'Nankai Tsuki' (Records of the Harbors in the Southern Coast) record that Mototsuna worked in Sanuki Province during the 16th century.
元綱自身は応仁の乱で戦死したが、近世に作成された「南海通記」などの史料には16世紀以降においても讃岐での元綱の活動が記されている。