When the Eizan Electric Railway was established, the Keifuku Electric Railroad was an affiliate company of the Keihan Electric Railway (the Keifuku Electric Railroad remains an affiliate company of the Keihan Electric Railway), but the Keifuku Electric Railroad (Eiden) had a unique characteristic in that the technology in rolling stock showed the strong influence of the Hanshin Electric Railway Co., Ltd. through the introduction of the Dena Type 500.
設立当時、京福電気鉄道が京阪電気鉄道の関連会社（現在も、京福電気鉄道は京阪電気鉄道の関連会社である）であったものの、デナ500形導入の経緯などから車両技術面では阪神電気鉄道色が強いなど、独特の京福（叡電）色を有していた。