Train services are normally formed of single-car diesel units, increased to two-car formations during the morning peak.

[2] Two more KiHa 11-200 series cars, formerly owned by Tokai Transport Service Company (TKJ) in Aichi Prefecture, were purchased by the Hitachinaka Kaihin Railway in 2015 and 2016.

KiHa 2004 was withdrawn from service in December 2015, and sold to the Heisei Chikuhō Railway in Kyushu in 2016.

Because of its severe financial situation, Ibaraki Kōtsū decided to withdraw from railway operation.

In September 2007, Ibaraki Kōtsū and the city of Hitachinaka agreed to transfer the line to a third-sector (funded jointly by local government and private sector) company, later incorporated as Hitachinaka Seaside Railway.