The Class 22 Sleeping Car was launched to JNR in 1958. The class of train was for providing overnight services. This class of sleeping car is equipped with air-conditioning (cooling and heating) system.
The farewell service of Class 22 Sleeping car was served on 29th November, 1997. The route was from New Osaka Station to Okayama Station. The serial number of this car is Nahanefu 22 1. It was built in 1964.