秋田新幹線
The initial fleet of six "J" sets was constructed as eight-car trains for the start of the new Akita shinkansen services starting in March 1997, and ran in conjunction with E3 series Akita Shinkansen units on Tōhoku Shinkansen "Yamabiko"/"Komachi" services between Tokyo and Morioka. These sets are classified E2', and are equipped with retractable nose-end couplers at the Morioka end. Units J2 onwards were delivered from December 1996 to March 1997.