
thumb|Daisen Kofun, the largest of all kofun, one of many tumuli in the [[Mozu kofungun, Sakai, Osaka Prefecture (5th century)]] are megalithic tombs or tumuli in Northeast Asia. Kofun were mainly constructed in the Japanese archipelago between the middle of the 3rd century to the early 7th century AD.
thumb|Daisen Kofun, the largest of all kofun, one of many tumuli in the [[Mozu kofungun, Sakai, Osaka Prefecture (5th century)]] are megalithic tombs or tumuli in Northeast Asia. Kofun were mainly constructed in the Japanese archipelago between the middle of the 3rd century to the early 7th century AD.
The term is the origin of the name of the Kofun period, which indicates the middle 3rd century to early–middle 6th century. Many kofun have distinctive keyhole-shaped mounds (). The Mozu-Furuichi kofungun or tumulus clusters were inscribed on the UNESCO World Heritage List in 2019, while Ishibutai Kofun is one of a number in Asuka-Fujiwara residing on the Tentative List.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).