The Tobu 1800 series (東武1800系, Tōbu 1800-kei) was an express electric multiple unit (EMU) train type operated by the private railway operator Tobu Railway in Japan from 1969 to 2018.

One six-car set remained in operation until May 2018, which was based at Minami-Kurihashi Depot, and formed as follows.

The remaining set, 1819, was subsequently used for charter trains and seasonal extra services.

[3] Three sets (1811–1813) were kept in storage next to Tatebayashi Station from April 1998 following their withdrawal from Ryomo services.

Conversion involved arranging the seats in fixed 4-seat facing bays, removal of the vestibule partitions, and repainting in the Tobu commuter stock colour scheme of white with blue bodyline stripes.