Musashifuchu kumanojinja Shrine Tomb

One of only 4 'joen-kahofun' style (a term denoting a flat, square base and a round top) stone burial mounds discovered in Japan.
Constructed in around the middle period of the 7th century, the stone joen-kahofun is absolutely huge, and one of the biggest burial mounds in Japan.
Every year a festival is held at the burial mound.