An ancient heap of shells at Sakatsuji Shell Midden in the city of Toyohashi, Aichi Prefecture, most likely served as a clam processing site in the latter half of the mid-Jomon Period, approximately 4,500 years ago, an investigation conducted by the city’s board of education has revealed. Piles of clamshells with a stone structure above them are seen at an excavation site at the Sakatsuji Shell Midden in Toyohashi, Aichi Prefecture...

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