Since they had long been highly valued and were collected into the hands of powerful figures such as Nobunaga ODA and Hideyoshi TOYOTOMI, many were burned in the Honnoji Incident and Osaka Natsu no Jin (Summer Siege of Osaka).
古来珍重されてきたため、織田信長、豊臣秀吉と言った権力者の元に蒐集され、本能寺の変、大阪夏の陣で焼身になったものが多い。