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History and Current Status of Scallop Shell Recycling in Aomori Prefecture - From 1997 to the 2020s In 1997, Kanai Tsuyoshi Co., Ltd. in Aomori City, Aomori Prefecture, recycled scallop shells into the building material "Scallop Tile," contributing to local waste reduction and resource reuse. Entering the 2020s, the Aomori Eco-Cycle Industry Cooperative began offering versatile products like fertilizers and de-icing agents. Additionally, Yamagami expanded into detergents and nail products using shells. The Aomori Prefecture Scallop Distribution Promotion Association also promotes uses as food additives and antibacterial agents, contributing to higher shell recycling rates. However, reducing discharge volumes and expanding utilization remain ongoing challenges.