Naturally, high-level specifications were applied to many of the train-cars of these private railway companies (for example, 100 series electric train-cars of Hankyu, 2200 series electric train-cars of Sangu Kyuko Electric Railway, and electric train-cars of Hanwa Electric Railway), slightly affecting the development of the distributed traction system in JNR to be described later.
これらの私鉄で用いられた電車は、当然だがハイレベルな仕様の車両が多く（阪急100形電車、参宮急行電鉄2200系電車、阪和電気鉄道の車両など）、後述する国鉄における動力分散方式の開発にも、いくらか影響を与えている。