The S.S. Anemone Incident was a horrific incident that happened on September 11, 2010. It detailed of many children on-board the S.S. Anemone who all somehow fainted, for reasons still unknown. There were only two survivors, Kaito Yashio and Akiho Senomiya, who then started suffering from a syndrome known as the Elephant-Mouse Syndrome, which will cause their time perceptions to change, momentarily.
Later in the anime, Sawada gives Kaito the N IV, a device capable of producing electromagnetic (EM) waves. Kaito then starts to think that a device similar to the N IV could have been used by Kou Kimijima during the S.S. Anemone Incident, due to the fact that Kaito's "slow mode" is activated when the N IV is turned on.