Momotaro is a Japanese fable. Momotaro left on a quest to slay evil ogres after his village was attacked. On his way, he befriended a dog, monkey, and bird, and together they defeated the ogres. At the end of the fable, Momotaro transforms into Mt. Momoyama, and this shrine is dedicated to the mountain.
The Kami of Momotaro Shrine are said to ensure safe deliveries of babies and health for children. The characters from the fable can be found all over the shrine grounds, giving a different feel to the usual solemnity of Japanese shrines.