The Tokyu 300 series (東急300系, Tōkyū 300-kei) is a series of articulated trams built by Tokyu Car Corporation in 1999 for the Tōkyū Setagaya Line.

[1] The trains entered revenue service on 11 July 1999.

[citation needed] In commemoration of the 110th anniversary of the Tamagawa Electric Railway in April 2017, set 305 received a special wrapping.

[2] For the 50th anniversary of the Setagaya Line in May 2019, set 308 received a cat-themed wrapping.

[3] From 10 April 2022, a 300 series set is due to receive a special livery to commemorate the 100th anniversary of Tokyu Corporation's founding.