The Tobu 30000 series (東武30000系, Tōbu 30000-kei) is a DC electric multiple unit (EMU) commuter train type operated by the private railway operator Tobu Railway in Japan since 1997.

As of 24 January 2020[update],[4] the fleet consists of one six-car and one four-car set based at Minami-Kurihashi and Kasukabe depots for Tobu Skytree Line and Tobu Nikko Line services, and 14 permanently coupled 6+4-car sets based at Shinrinkoen Depot for Tobu Tojo Line services.

Sets 31607 and 31407 onward had higher light blue panels on the seat ends.

[6] However, as the driving cabs between the two sets led to reduced capacity, which hampered the fleet's ability to cope with the congestion rates of the Hanzomon and Den-en-toshi lines, the 30000 series' usage on these services was reduced in late 2005.

[8] 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.