The Tōya Maru (洞爺丸) was a Japanese train ferry constructed by the Japanese National Railways which sank during a typhoon in the Tsugaru Strait between the Japanese islands of Hokkaidō and Honshū on September 26, 1954. It is said that 1,153 people (Japanese National Railways announcement in September 1955) aboard were killed in the accident. However, the exact number of fatalities remains unknown because there were victims who managed to obtain passage on the ship at the last minute, and others who cancelled their rides just before the incident occurred.