The Sotetsu 9000 series (相鉄9000系) is a DC electric multiple unit (EMU) type operated by the private railway operator Sagami Railway (Sotetsu) on commuter services in Kanagawa Prefecture, Japan, since 1993.

[3] From 2011, the fleet was gradually repainted into the new corporate livery, and some sets received single-arm pantographs in place of the original lozenge type.

[2] Set 9701, which wasn't part of the Yokohama Navy Blue refurbishment programme, was scrapped on 11 December 2020.

[4] From 2016, the 9000 series EMU fleet is scheduled to undergo a programme of refurbishment.

This involves new interiors, including leather seat covers on the transverse seating bays, interior lighting that can be adjusted to suit day and night conditions, and a new exterior livery of Yokohama Navy Blue.