Aminochoshiyama-kofun Tumulus (網野銚子山古墳)
Amino Choshiyama-kofun Tumulus is a keyhole-shaped mound in Amino-cho, Kyotango City(former Amino-cho, Takeno-gun), Kyoto Prefecture. It is a gigantic tumulus with the total length of 200 m. It is counted among the three great tumuli along the coastline of the Sea of Japan, together with the Shinmeiyama-kofun Tumulus and the Ebisuyama-kofun Tumulus. It is the largest of them. It is designated as a national historical site.
The tumulus seems to have been built between the end of the early Kofun (Tumulus) period and the beginning of the mid-Kofun period (between the late fourth century and the early fifth century).
The tumulus is accompanied by two baizuka (smaller tumuli) of the Tumulus of Cloistered Emperor Kanpyo and the Kochoshi-kofun Tumulus, both of which are specified as national historical sites.
In 1918 Sueji UMEHARA carried out research on the tumulus, which was designated as a national historical site based on his findings.
Conducted for the purpose of rice paddy development in 1986, the excavation discovered a surrounding moat in the south-eastern part of the mound.