Tokyu 5000 series (1954)

The Tokyu 5000 series is a Japanese city commuter electric multiple unit operated by the Tokyu Corporation from October 1954 to June 1986.
==History==
The 5000 series sets were designed as the Tokyu Corporation's first high-performance train. A total of 105 cars were produced from 1954 to 1959. The cars featured high performance and low manufacturing costs due to their monocoque structure. Due to their shape the trains were affectionately nicknamed the "green frog" or the "tree frog". The sets were initially used on the Tokyu Tōyoko Line but were moved to other lines later in their lives, being used on the Ōimachi and Mekama Lines (now part of the Meguro Line) in their final years. All sets were retired by 1986.
After their retirements on the Tokyu network many cars were moved to other private railroads; the Nagano Electric Railway received twenty-nine cars, Fukushima Transportation received four cars, the Kumamoto Electric Railway received seven cars, the Gakunan Railway received eight cars, Ueda Kotsu received nine cars and the Matsumoto Electric Railway received eight cars.
One 5000 series car survives today; DeHa 5001, currently located in Akita Inu no Sato in Odate, Akita. Originally transferred back to Tokyu Corporation from Ueda Kotsu after retirement in 1993, the set was repainted back into its original livery and restored. It was originally stored at Nagatsuta Depot but was later moved to Tokyu Car Corporation's premises; all underfloor equipment and bogies were removed from the car and displayed near Shibuya Station near the Hachikō statue, where it acted as a tourist information booth and remained an iconic landmark for years. In 2020 it was announced that the car would move out of its location to Akita; this move was delayed due to the effects of the COVID-19 pandemic, but after some painting and interior work the car was open for display again from April 2021. Four other cars operated by private railroads also survive.
A train with the same designation was introduced in 2002; other than both sharing a name both trains are unrelated. As a result, this train has often been referred to as the "old 5000 series"; one of the later 5000 series sets was later given a special livery resembling that of one of the old 5000 series sets.
==Design==
The 5000 series cars use a contemporary design featuring a curved front and a single top-mounted headlight. The cars featured a monocoque structure, something which until that point was only used on aircraft.
==Specifications==
Construction of the cars is of steel with high tensile strength; these were the last trains on the Tokyu network to use steel bodies, with all future trains using stainless steel bodies. These were also Japan's first trains to adopt the cardan drive shaft in large quantities.
Category:Electric trainsets
Category:Tokyu trains
Category:Tokyu Car locomotives