n'afọ 1954, ụgbọ mmiri ise, gụnyere Tōya Maru, mikpuru na Tsugaru Strait n'oge ajọ ifufe, na-egbu ndị njem 1,430. N'afọ sochirinụ, Japanese National Railways (JNR) mere ngwa ngwa nyocha nke ọwara ahụ. Ihe ọzọ na-echegbu onwe ya bụ mmụba nke okporo ụzọ n'etiti agwaetiti abụọ ahụ.
Site na 1955 ruo 1965