railway police officer (pre-1987)
Historical term for a railway police officer in Japan before the 1987 privatization of Japanese National Railways. Now replaced by terms like 鉄道警察官.
See also: 鉄道公安官
Railway police officers maintained security in stations and on trains during the JNR era.
Synonym; also a historical term for railway police officer. 鉄道公安職員 is a slightly more formal or official-sounding variant.
Modern term for railway police officer, used after the 1987 reforms.
Compound of 鉄道 (railway) + 公安 (public safety) + 職員 (staff member). The term became historical after the dissolution of Japanese National Railways in 1987.