Kofun in Uzumasa, Ukyo Ward, Kyoto — the earthen mound is largely gone but the massive 17.8m horizontal stone chamber is exposed and preserved. The chamber rivals the famous Ishibutai Kofun in Nara and is the largest in Kyoto Prefecture. National Historic Site. Attributed to the Hata clan; together with Uzumasa and Koryuji Temple, it forms the "sacred precinct of the Hata clan," popular with history enthusiasts.
Finds & research
The mound's artifacts are largely lost, but the two-flanked stone chamber (25.8㎡ floor) survives. Records from an 1887 survey document metal ornaments, iron weapons, horse trappings, and Haji ware pottery.
Two views on the occupant
Archaeological view
75m keyhole mound (rear circle ~45m, front ~30m wide). Late 6th–early 7th century. Holds Kyoto Prefecture's largest horizontal stone chamber: 17.8m total, 6.8m×3.8m×5.2m chamber (25.8㎡ floor — comparable to Ishibutai Kofun in Nara). Two-flanked passage type. The earthen mound was largely destroyed by housing development; only the stone chamber now remains exposed. Attributed to the Hata clan, a continental immigrant lineage that developed the Sagano area. Their headquarters was in Uzumasa (太秦), reflecting the name's deep connection.
Imperial Household Agency view
Not designated by the IHA. Designated as a National Historic Site (stone chamber area) on May 4, 1977. Managed by Kyoto City.
Field notes
Free access to view the stone chamber exterior (interior off-limits). About 5 min walk from Randen "Arisugawa" Station. Classic combined tour with Koryuji Temple (famous Miroku Bodhisattva statue) and Amatsuka Kofun (id:295) as a "Uzumasa / Hata Clan Heritage Walk."