Emperor Antoku and Taira no Kunimori, who are said to have died in the Battle of Dannoura in textbooks, were actually body double. In Iya, there is another Tale of the Heike that the Heike clan, including Emperor Antoku and Taira no Kunimori, escaped to this place after being defeated in the Battle of Yashima. The Heike legend, which remains in the unexplored region, and many materials that show the lifestyle of Iya are on display.