e6 komachi
Formerly known as "Super Komachi". The E6 series (E6系) is a Japanese Shinkansen high-speed train type operated by East Japan Railway Company (JR East) on Komachi "mini-shinkansen" (Shinkansen on non-high-speed line) (services on the Tōhoku Shinkansen and Akita Shinkansen from Tokyo to Akita since 16 March 2013. A pre-series set was delivered in June 2010 for extensive testing, with 23 full-production sets delivered between November 2012 and spring 2014
The 7-car E6 series trains operate in conjunction with E5 series or H5 series (since March 2016) 10-car trains, initially on just four return services daily from 16 March 2013. They replaced all of the previous E3 series trains on Komachi services by 15 March 2014.