This tomb is sealed by a giant rock weighing 2,300 tons

It is a 106-meter-long zenpo-koen-fun that is a mound shaped like a keyhole. This tumulus is the largest in Tokyo and is said to have been built in the 5th century.

One of the world’s largest tombs built around the mid-fifth century

A wall painting of a beautiful woman was discovered here

The Tumulus cluster dates back to the latter of the Kofun (tumulus) period (250 - 538). Excavations unearthed horse tack like bits for horses, Sue ware (type of unglazed pottery made from the middle of the Kofun era through the Heian era), Haji ware (plain, unglazed, reddish-brown Japanese pottery made from the Kofun era through the Heian era), and haniwa (clay figures from the Kofun period).

The Noge Otsuka Tumulus is the largest tumulus of the Noge Tumulus Cluster. Excavations have unearthed objects like armor, stone tools, and grave goods made out of beads.