disappearance after an accident or disaster; missing and presumed dead
Legal term for a disappearance lasting over one year following an accident or disaster, where the person is presumed dead.
When a declaration of disappearance after an accident or disaster is received, the person is legally considered deceased.
失踪 is a general term for disappearance or missing persons, while 危難失踪 specifically refers to disappearance following an accident or disaster with a legal presumption of death.
認定死亡 is a broader legal concept of presumed death, whereas 危難失踪 is a specific ground for such a declaration under Japanese law.
Compound of 危難 (danger, peril) and 失踪 (disappearance). The term is a legal construct with no deeper historical derivation.