Kato 5141 Passenger Car JNR Suyuni50 - N Scale
 
Night local train with connected sleeper cars
``San'in'', which ran on the San'in Main Line during the JNR era, is a night local train that connected 386.2 km between Kyoto and Izumo City. Although it is a local train, it has B sleeper cars connected to it, and was given the nickname ``San'in'' so that the B sleeper seats could be reserved using the Mars seat management and ticketing system. The formation consisted of a luggage car, a mail luggage car, a 10 series B sleeper car, and a 43 series seat passenger car, and was towed by DD51. They had various characteristics depending on the section of service, such as the last train, first train, commuter train, local train, etc., and also played a role in transporting mail and luggage to areas along the line, supporting the movement of people and goods on the San'in Main Line in the past. .

The Suuni 50 0 series is a mail and luggage vehicle for Honshu, and is an all-steel vehicle with a body shape similar to the 50 series. It was seen on the night train "San'in" in formations from around 1980 onwards