In the Showa 50's, the locomotive train of locomotive trains had been decreasing in various regions, but in rural metropolitan areas, the passenger train which can demonstrate the transportation power for commuting to school in the morning and evening was left in handy. However, the vehicles used are mainly old-fashioned passenger vehicles with age of over 30 years, newly designed for regular trains for the first time in 18 years, for new transportation improvement and safety improvement In 1977 (1977) was born in 50 series general type passenger car.