The Tokyu 8090 series (東急8090系, Tōkyū 8090-kei) and the related Tokyu 8590 series (東急8590系, Tōkyū 8590-kei) were commuter electric multiple unit (EMU) train types that were operated by the private railway operator Tokyu Corporation in the Kanto region of Japan from 1980 until 2019.

The trains have lightweight stainless steel car bodies.

The car bodies were designed using computer analysis while maintaining the necessary strength.

[1][2] Tokyu operated the 8090 series as five- and eight-car sets, with three and six motored cars per trainset.

[3] The 8590 series cab cars have emergency exit doors in the front to permit operation on underground lines.