Tokyu (Tokyo Kyuko, 'kyuko' means 'express') is not the longest private railway, but financially it is one of the most important compamny in Japan. It has two main lines (Toyoko line and Dennentoshi Line) and some branches. Although silver stainless cars were its tradition for 40 years, nowadays it is no longer special in Japan. Interestingly, Keikyu, Hankyu and Keihan (train companies) are getting unique since they have not introuced stainless cars.