There are three big stones in Mitsuishi shrine, and a legend which also derives from a prefecture name in Iwate is left. When the people worried by demon's villainy as an ogre before prayed to Mitsuishi's god, you got rid of a demon. And when he never did them wrong, an ogre pushed a draft towards a rock. This will be the history of the name in Iwate, and the dance by which people danced then is called origination of "Sansa Odori".