Fastech 360 is the name given to a pair of former experimental high-speed EMU trainsets developed by East Japan Railway Company (JR East) to test technology for the next-generation Shinkansen rolling stock.

Speeds of up to 405 km/h (250 mph) were targeted during performance testing.

[1] Results of testing using these trains was incorporated into the E5 series and E6 series trains, entering revenue service from 2011, eventually operating at 320 km/h (200 mph).

There were 2 trains: Fastech 360 trains were equipped with emergency air braking plates like that of an aircraft, similar in appearance to the ears of a cat.

Cars 1 and 4 to 6 were built by Kawasaki Heavy Industries, and cars 2 and 3 were built by Hitachi[5] The train was withdrawn in December 2008 and scrapped.