Akyū ruins, Archaeological site in Hara, Japan.
The Akyū ruins cover 56,000 square meters on a ridge at the southeastern foot of Mount Yatsugatake, standing at an elevation of 904 meters.
The settlement remained continuously inhabited for several thousand years throughout the Jōmon period, from approximately 4000 BCE to 300 BCE.
Excavations revealed foundations of 30 round pit dwellings, eight square pillar dwellings for grain storage, and 700 tombs arranged around a central plaza.
The artifacts found at Akyū ruins, including Jōmon pottery and stone tools, are displayed at the Nagano Prefectural History Museum and Yatsugatake Museum of Art.
The site features Japan's largest stone circle, measuring 120 meters in diameter and constructed with approximately 200,000 fist-sized river rocks.
Location: Hara
GPS coordinates: 35.96456,138.18972
Latest update: March 21, 2025 21:32
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