[1] Based on the 5000 series design, cars are 18 metres long and have three sets of doors per side.

Since 2019, they have occasionally been used to provide additional capacity on the Kodomonokuni Line during special events.

[2][3][4] As of 1 April 2019[update], the fleet consists of 15 three-car sets, 7101 to 7115, formed as follows.

[10] Six additional sets, numbered 7110 to 7115, were delivered from the J-TREC factory in Yokohama in 2018.

[11][12] From 10 April 2022, two 7000 series sets are due to receive a special livery to commemorate the 100th anniversary of Tokyu Corporation's founding.