Kurozuka Kofun
This ancient burial mound has a total length of 130 meters and construction for it started in the late 3rd century and went into the 4th century until it was finished.
It's unclear as to who is buried in the mound, but among the excavated artifacts buried there are 33 ancient triangular bronze mirrors (Sankakubuchi Shinjukyo), which are the most ever found in Japan.
It's assumed that these were given to Himiko from the Emperor of Wei, who was highly influential at the time.
There's an exhibition hall right next-door with a pit-style stone hut that has been fully restored to its original size, as well as an excavated Sankakubuchi Shinjukyo Mirror, Gabuntai Shinjukyo Mirror, and iron sword replicas.