Tobu 6050 series
The is an electric multiple unit (EMU) train type operates "Local" and "Express/Section-Express" services by the private railway operator Tobu Railway and connecting Aizu Railway and Yagan Railway in Japan since 1985. It operated "Rapid/Section Rapid" services until April 2017 Design. The 6050 series design was created from 1985 by rebuilding former 6000 series EMUs dating from 1964 with new steel bodies. The trains were required to satisfy fire resistance regulations applying to the long tunnel on the Aizu Kinugawa Line ahead of the start of through running operations from 9 October 1986. Livery . Trains are painted in "jasmine white" with "sunny coral orange" and "purple ruby" lining. Formations. The fleet of 33 two-car sets is formed as shown below. Interior. Passenger accommodation consists of fixed 4-seat bays with a seat pitch of . History. All 44 former 6000 series cars were rebuilt between September 1985 and October 1986 as sets 6151 to 6172, with the first sets entering revenue service from 15 November 1985. With the popularity of the new trains, a further 8 new 2-car sets were built, including one set for the Yagan Railway, enabling all "Rapid" services between  Asakusa and Shimo-Imaichi to be increased to 6-car formations from the 9 August 1988 timetable revision. A further two newly built sets were added to the Yagan Railway fleet coinciding with the start of Aizu Kinugawa Line services, and one new set was delivered to the Aizu Railway in 1990. Two 6050 series sets, 6177 and 6178, were rebuilt in September 2012 at J-TREC in Yokohama to become 634 series sets for use on "Skytree Train" services from 27 October 2012.