TX-2000 series - a commuter EMU operated by the Metropolitan Intercity Railway Company on Tsukuba Express services.TX-1000 series - a commuter EMU operated by the Metropolitan Intercity Railway Company on Tsukuba Express services, built by Kawasaki to A-train specifications.Tōyō Rapid 2000 series - a commuter EMU operated by the Tōyō Rapid Railway Line.Tokyo Metro 18000 series - an EMU type operated on the Tokyo Metro Hanzōmon Line.Tokyo Metro 17000 series - an EMU type operated on the Tokyo Metro Yūrakuchō Line and Tokyo Metro Fukutoshin Line.Tokyo Metro 16000 series - an EMU type operated on the Tokyo Metro Chiyoda Line built in cooperation with Kawasaki.Tokyo Metro 15000 series - an EMU type operated on the Tokyo Metro Tōzai Line.Tokyo Metro 10000 series - an EMU type operated on the Tokyo Metro Fukutoshin Line and Tokyo Metro Yūrakuchō Line.Tokyo Metro 05 series - an EMU type operated on the Tokyo Metro Tōzai Line.Tobu 50000 series - a commuter EMU operated by the Tobu Railway.
The primary feature is that vehicle car bodies are constructed from double skin aluminium extruded sections, which are friction stir welded, creating a strong body.
The "A-train" design concept includes several elements.