It has been said that this place came to be called Haido since Iwatsukiwake-no-Mikoto came to the place to learn Amenaru-Michi (Way of Heaven) conveyed by Sarutahiko (Shinto god) and he worshipped in the morning and evening from afar Mio Daimyojin deity which enshrined Sarutahiko no mikoto.
磐衝別命は猿田彦の天成神道を学ぶため当地に来住し、朝夕猿田彦命を祀る三尾大明神を遙拝されたのでこの地を拜戸と言うようになったと伝わる。