The Tobu 30000 series(東武30000系,Tōbu 30000-kei?) is a commuter electric multiple unit (EMU) train type operated by the private railway operator Tobu Railway in Japan since 1997. The fleet consists of 6-car and 4-car sets, as well as some sets formed as permanently coupled 10-car formations since 2011.
As of 1 April 2013, the fleet consists of nine 6-car and nine 4-car sets based at Minami-Kurihashi and Kasukabe depots for Tobu Skytree Line and Tobu Nikko Line services, and six permanently coupled 6+4-car sets based at Shinrinkoen Depot for Tobu Tojo Line services.
Permanently coupled sets 31401 and 31601 undergoing driver training on the Tojo Line, April 2011
Sets 31601 and 31401 were transferred to Shinrinkōen Depot on the Tobu Tojo Line on 26 January 2011. These sets entered revenue service from 13 June 2011 following modifications at Shinrinkōen Depot to form a permanently coupled 10-car set with control equipment and skirts removed from the two intermediate driving cabs.
Permanently coupled intermediate driving cabs of cars 36601 and 31401, April 2011