The HB-E300 is one of the so-called resort trains, which are used to undertake excursions on routes that are attractive to tourists. It is based on the E200 hybrid railcar, which was only built three times. There is a 331 kW diesel engine in each car, which is supported by batteries and is only started when necessary.
A total of six sets of the HB-E300 were built, half of which consist of two cars and half of which consist of four cars. Almost every train is used on a different line, only two two-car sets are used on the “Resort Asunaro” route, which were the first to be modernized in 2023. Depending on the line, the interior also has a dining car or compartments. 