The main gate of Saiin (birth institute). There are statues of Kongo wrestlers (Nio) on the left and right sides of the front of the gate, and large sandals on the west. The current building was rebuilt in 1889 (Meiji 22), but the statue of the Kongo wrestler was made in the North and South Dynasties and Ao 3 (1370). In the past, the Ishibashi in front of the Niomon Gate was called “Hatsubashi” because it could only pass on the 20th of every month.