JR Kyushu DEC 819 series DENCHA

Data (as of 29 Nov 2025)

History

The BEC 819 series, hereinafter referred to as the 819 series, is a type of battery-electric multiple unit of JR Kyushu. In 2012, the company converted a unit of 817 series with batteries and carried out experiments, to develop the 819 series. JR East later introduced a similar type called EV-E801 series to the Oga Line in Akita Prefecture.

Each unit consists of two coaches with longitudinal seating. The 819 series was first introduced to the Chikuho Main Line (also known as the Wakamatsu Line), and then gradually expanded. In 2019, the company introduced trainsets with larger batteries and enhanced Ethernet cables to the Kashii Line. The 819 series replaced all KiHa 31 series and KiHa 40 series in Fukuoka Prefecture.

"BEC" presumably means "Battery Electric Car", while "DENCHA" stands for "DUAL ENERGY CHARGE TRAIN". "DENCHA" also resembles a Japanese word "densha", which means "(electric) train".

Current Operations & Future Prospects

The 819 series is used on the Chikuho Main and Kagoshima Main Lines (also known as the Fukuhoku Yutaka and Wakamatsu Lines) as well as the Kashii Line. Those on the Kashii Line have been operated without a driver since 2023 though there is a staff in case of emergency.

In addition, it is also used for a handful of stopping services between Orio and Futsukaichi on the Kagoshima Main Line, where the train runs just like an ordinary electric train (i.e. without using the batteries).

Photo

When the 819 series runs electrified railways like the Kagoshima Main Line, its pantographs are raised, making it effectively an ordinary electric multiple unit.