145m keyhole mound in Yosano Town — National Historic Site. One of the "Three Great Tombs of the Sea of Japan." The boat-shaped stone coffin discovered by chance in the 1927 North Tango Earthquake is notable. Open as Yosano Town Kofun Park alongside the No.2 square mound (42m) and others.
Finds & research
Boat-shaped stone coffin (Kyoto Prefectural Tangible Cultural Property); vertical pit stone chamber. Discovered via the 1927 North Tango Earthquake collapse.
Two views on the occupant
Archaeological view
145m keyhole mound (rear circle 87m dia., 16m high; front 73m wide). Three-tiered; stone paving and cylindrical haniwa. Late 4th century. Vertical pit stone chamber (direct wooden coffin burial) at the top of the rear. The 1927 North Tango Earthquake collapsed the rear, exposing a boat-shaped stone coffin — now a Kyoto Prefectural Tangible Cultural Property. One of the "Three Great Tombs of the Sea of Japan" alongside Amino Choshiyama and Shinmeiyama.
Imperial Household Agency view
Not designated by the IHA. Designated National Historic Site "Ebisuyama Kofun" in 1930 (Showa 5) together with No.2 and No.3 mounds. Developed 1989–1992 as Yosano Town Kofun Park.
Field notes
Open as Yosano Town Kofun Park (free). About 10 min walk from WILLER TRAINS (Kyoto Tango Railway) "Oeyamaguchi-Naiku" Station. Cherry blossoms and rapeseed flowers bloom around the mound in late April–early May. Exhibition facility within the park.