In his book "Kojikiden" (Commentaries on the "Kojiki"), Norinaga MOTOORI cited KAMO no Mabuchi's view that although they were originally a pair of deities, they came to be seen as the same deity in later years.
本居宣長の『古事記伝』では、賀茂真淵の説として、本来は男女一対の神であり、それが同一の神とされるようになったとしている。