The Chiba New Town Railway 9800 series (千葉ニュータウン鉄道9800形) is a commuter electric multiple unit (EMU) train type owned by the third-sector railway company Chiba New Town Railway and operated by the Hokuso Railway on the Hokuso Line in Japan since 21 March 2017.

The sole eight-car trainset, 9808, was converted and renumbered from former Keisei 3700 series EMU set 3738 to replace the former Chiba New Town Railway 9000 series EMU withdrawn following its last day in service on 20 March 2017.

[1] As of 1 April 2017[update], the fleet consists of a single eight-car set formed as shown below, with six motored (M) cars and two trailer (T) cars, and car 1 at the southern end.

[2] The two M1 cars each have two single-arm pantographs, and the M1' car has one.

[2]