The E3 Series Shinkansen are new Japanese Shinkansen high-speed trainsets built for the opening of the new Akita Shinkansen 'mini-Shinkansen' line, converted from a regular 3'6" narrow-gauge line between Morioka and Akita. The line joins with the Tohoku Shinkansen.
The initial units built starting in 1997 were 5-car sets, but sixth cars were built to integrate into the existing units by the end of 1998. Production is ongoing, with 25 sets scheduled to be produced ending in 2005. Two sets have a seventh car.