Arayashiki Shell Mound, Archaeological site in Wakaba ward, Chiba City, Japan.
The Arayashiki Shell Mound spans 150 meters north to south and 160 meters east to west, forming a horseshoe shape at 31 meters elevation.
Discovered in 1872 during lime mining operations, the site contains artifacts from the middle Jomon period, dating back 5500 to 3500 years.
The mound contains shells from Tokyo Bay species, including hamaguri, asari, kesago, and ibusago, revealing the dietary patterns of ancient inhabitants.
The archaeological remains can be reached through a 10-minute walk from the Totsubashi bus stop, with regular services running from JR Chiba Station.
After plans threatened its existence in 1964, engineers constructed a tunnel beneath the mound for the Keiyo Road extension, preserving this National Historic Site.
GPS coordinates: 35.62231,140.14495
Latest update: March 25, 2025 18:59
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