The Great Disaster of Sagami Bay (相模湾岸大災厄 Sagami-wangan Dai-saiyaku?) was the worst Aradama-related tragedy in history which happened from September 23 to 26, 1998. The incident occurred on the coast of Sagami Bay that led to large amounts of Noro being leaked into the sea, which formed into the largest Aradama ever observed. The Aradama landed on the coast and headed north, causing large-scale damage to the city of Fujisawa, which resulted in over 3000 casualties. Through cooperation of the SRRS and the Self-Defence Force, the Aradama was driven to Enoshima. Thanks to the efforts of the select few elites of the SRRS, it was successfully subjugated. Following the event, the aforementioned six elites were labelled heroes.
According to Richard Friedman, this disaster was caused by the action of humans gathering Noro in one place and attempting to send it overseas to the US.