Taima-no-Kehaya Stone Grave

This is a five-ring pagoda that is said to be the tomb of Taima Nokehaya, the founder of sumo wrestling.
During the reign of Emperor Suinin (around the 1st century), Taima Nokehaya partook in a test of strength against Nomi no Sukune, and this is said to be the first sumo match held in imperial presence in Japan.