Paying attention to their existence as a couple, some have an opinion that gods of the sun, originally a couple, were later sycretized with miko (a shrine maiden) who served them and enshrined together.
一対を成すことに着目して、本来一対だった太陽神とそれに仕える巫女が、やがて習合して祀られるようになっていったと見るむきもある。