The Hokuso 7300 series (北総鉄道7300形) is an electric multiple unit (EMU) commuter train type operated by the Hokuso Railway on the Hokuso Line in Japan since 1992.

[1] Based on the Keisei 3700 series design, two eight-car sets were introduced in 1992.

[1][2] As of 3 March 2022[update],[3] the fleet consists of two eight-car 7300 series sets and three eight-car 7800 series sets formed as shown below, with six motored (M) cars and two trailer (T) cars, and car 1 at the southern end.

[4] On 12 June 2020, the seventh car of set 7818 derailed while manoeuvering at Aoto Station.

[6] According to witnesses, the pantograph on the derailed car had detached from the train and became entangled with the overhead wire.