According to the tradition left in "Suwa Daimyojin Ekotoba" (literally, the origin in pictures and scripts of Suwa Daimyojin Shrine), etc, it is said that Takeminakata no kami was the god who came from outside the Suwa region, defeated the native god of Moriya-shin and became an enshrined deity of the Suwa region.
『諏訪大明神絵詞』などに残された伝承では、建御名方神は諏訪地域の外から来訪した神であり、土着の洩矢神を降して諏訪の祭神になったとされている。