小田急4000系を中心に掲載しています。
Series 4000 has been used on through services to the Tokyo Metro Chiyoda Line since 2007. Its body structure, interior, and electrical equipment are similar to those of JR East's Series E233, but the front design is original to Odakyu. The blue stripe is slightly lighter than that of previous Odakyu trains. Each trainset consists of 10 cars and is also used on express services.