The history of Ikuchi-shima. Kwan Yin Mountain, located in the southwest of Ikuchi-shima, was called "Taki Mountain of Fire" by Hirayama Ikuo when he was a child. Maybe it was related to the smoke from the top of the mountain that used to guide ships. As it looks like a waterfall falling down, he named it "Taki Mountain" (Waterfall Hill).It was said that H_nen, the religious reformer and founder of Pure Land Buddhism, was once here when he was exiled to Sanuki. A friend of Hirayama's Father found a damaged bronze mirror of Kamakura Period in farmland. Located in the northwest of the island and overlooking the port of Setoda Port, there is the Kojoji Temple on the hillside of Chaoyin Mountain, within which the Three-story pagoda was built in 1431 during the Muromachi period. Because of its unique decoration, it is also called "reverse lotus flower" and is designated as a national treasure because of its similar shape to an inverted lotus flower. Taking these factors into account, the island should have been very open since a long time ago and maintained close ties with the outside world.