The 1.5kV dc 11-car trains will be formed of five unpowered and six powered vehicles, which will be equipped with VVVF traction inverters. The E235s will also be the first trains in the JR East fleet to be equipped with oil-free compressors.

A pre-series train is due to be delivered to JR East for trials next March ahead of the introduction of the fleet from autumn 2015 onwards.

The E235 features internal and external styling by industrial designer Ken Okuyama, who has previously designed cars for Porsche, Ferrari, and Maserati.