The Japanese Bullet Train Tohoku Shinkansen E5 series Hayabusa and the E6 super komachi connected train and the E5 series Yamabiko + E3 Series Komachi connected train.
For E5 series and E6 Series connected trains, it is possible to run at a maximum speed of 320 km/h, but for E5 Series and E3 Series, it runs at a maximum speed of 275 km/h which is the maximum speed of the E3 series.
In March 2014, the operation of the E3 Series on the Akita Shinkansen has ended and all the Train are replaced with the E6 series.

Japanese Bullet Train of Tohoku&Akita Shinkansen.