What is shinkansen relay?

Shinkansen Relay

The Shinkansen Relay (新幹線リレー号?) was a train service operated by Japanese National Railways (JNR) in Japan between 1982 and 1985.

Read more about Shinkansen Relay.

Some articles on shinkansen relay:

Rapid Shinkansen Relay (April 2011)
... The Shinkansen Relay name was again used for a short period from 12 to 24 April 2011 for limited-stop "Rapid" services operated between Fukushima and Sendai via the Tohoku Main Line as a substitute for the ...