Daibo Kofun is located on the side of the hill along Chujo Valley in Kannabe-cho, Fukuyama City, Hiroshima Prefecture. It is a circular-shaped kofun with a diameter of 14 m. The stone chamber dug into the side of the wall and made of worked stone material is very distinctive. You can step into the kofun through a large opening at the side. The chamber is 11.2 m in total length, 1.9 m wide and 1.9 m tall. Huge granite cubes are used for the ceiling, walls and pillars.
The era of its construction is not identified from the excavated articles, but the shape of the chamber indicates that it was built in the early 7th century. Its huge and beautifully balanced symmetrical structure, which is rarely seen in the structures built 1,400 years ago, shows the aesthetic feeling and pride of the ruler who was berried in this kofun. Daibo Kofun was designated as a Historic Site by Hiroshima Prefecture in 1983.