Throughout history, kofun were continuously destroyed for agricultural land; in the Middle Ages, kofun were destroyed to build fortresses, and in modern times, kofun are destroyed for residential land (especially after World War II).
農地のための破壊は歴史を通じて見られ、中世には城砦のために、近代（特に戦後）には宅地のために破壊されてきた。