Kosegasawa Cave, Archaeological cave in Aga, Japan
Kosegasawa Cave extends seven meters into a rhyolite outcrop along the Muroya River, measuring 1.5 meters in width at an elevation of 200 meters.
Archaeological excavations between 1958 and 1959 uncovered stone tools, hunting implements, and pottery from the earliest stages of the Jomon Period.
The site received national recognition in 1982 as a Historic Site of Japan, with 1350 artifacts later designated as National Important Cultural Property.
Visitors can reach the cave within 20 minutes by car from Tsugawa Station on the JR East Ban'etsu West Line, though no facilities exist at the location.
Stone projectile points discovered in the cave share characteristics with artifacts found in the Primorsky Krai region of eastern Siberia, indicating potential ancient connections.
Location: Aga
GPS coordinates: 37.59222,139.40500
Latest update: April 1, 2025 20:04
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