The Class 951 (951形) was an experimental Japanese Shinkansen train built to test the technology for future high-speed trains operating at speeds of up to 250 km/h (155 mph) following the opening of the Tokaido Shinkansen in 1964.

[1] The train was unveiled to the press on 26 March 1969, with formal test running commencing on the Tōkaidō Shinkansen from 2 July 1969.

[4] Car 951-2 was transferred to the Railway Technical Research Institute in Kokubunji, Tokyo, where it was used for roller rig testing.

Car 951-1 was donated to the nearby Hikari Plaza Community Centre in 1994, where it is open to the public.

[5] Car 951-2 was subsequently stored out of use inside the Railway Technical Research Institute,[1] and was cut up in 2008.