Core alert: On July 31, 2025, the supply of frozen tuna at Toyosu Market in Tokyo, Japan, encountered a sudden interruption. The previous day, a strong earthquake occurred on the Kamchatka Peninsula in Russia, triggering a tsunami warning along the Pacific coast of Japan, forcing several ultra-low temperature cold storage facilities to temporarily suspend the transportation plans for frozen tuna due to safety considerations. As a result, the volume of frozen tuna auctions at Toyosu Market on that day sharply decreased, with trading volume almost "halved," a rare occurrence this year.