There are several theories about the origin of the name "Iwate", but the most well known is the tale Oni no tegata, which is associated with the Mitsuishi or "Three Rocks" Shrine in Morioka. These rocks are said to have been thrown down into Morioka by an eruption of Mt. Iwate. According to the legend, there was once a devil who often tormented and harassed the local people. When the people prayed to the spirits of Mitsuishi for protection, the devil was immediately shackled to these rocks and forced to make a promise never to trouble the people again. As a seal of his oath, the devil made a handprint on one of the rocks, thus giving rise to the name Iwate, literally "rock hand". Even now after a rainfall it is said that the devil's hand print can still be seen there.