Tohoku Shinkansen 東北新幹線
There are two branch lines on the Tohoku Shinkansen which run on normal rail tracks and are known as "mini-shinkansen" - these are the the Yamagata Shinkansen from Fukushima in Fukushima Prefecture to Shinjo in Yamagata Prefecture and the Akita Shinkansen from Morioka to Akita via Omagari.
Tohoku Connections & Japan Rail Passes
The complete list of stops on the Tohoku Shinkansen is: Tokyo Station, Ueno Station, Omiya, Oyama, Utsunomiya, Nasu-Shiobara, Shin-Shirakawa, Koriyama, Fukushima, Shiroishi-Zao, Sendai Station in Sendai, Furukawa, Kurikoma-Kogen, Ichinoseki, Mizusawa-Esashi, Kitakami, Shin-Hanamaki, Morioka, Iwate-Numakunai, Ninohe, Hachinohe, Shichinohe-Towada and Shin-Aomori.
There are 4 services operating on the Tohoku Shinkansen and one service each on the Akita Shinkansen and Yamagata Shinkansen.
Hayabusa - this is the fastest shinkansen service from Tokyo to Shin-Aomori with limited stops. The Hayabusa train does not have non-reserved seating. Standing tickets can be purchased if the train is full.
Hayate - Tokyo to Morioka with limited stops and no stops between Omiya and Sendai. Less frequent than the Hayabusa and Yamabiko. The Hayate train does not have non-reserved seating. Standing tickets can be purchased if the train is full.
Yamabiko - Tokyo to Sendai with limited stops, then all-stations to Morioka. Some Yamabiko trains terminate at Sendai. The Yamabiko train has non-reserved seating in cars 1-5, sometimes cars 1-3 in a ten car train. In a 17 car train cars 12-17 are non-reserved.Standing tickets can be purchased if the train is full.
Nasuno - Tokyo to Koriyama stopping at all-stations. This is the slowest service.
Komachi - Tokyo to Akita. The Komachi is joined with the Hayabusa to Morioka and then is de-coupled and runs alone to Akita. The Komachi train has reserved seating only. However, standing tickets can be purchased if the train is full. Seating is a 2x2 arrangement on these narrower trains.
Tsubasa - Tokyo to Shinjo. The Tsubasa is joined with the Yamabiko to Fukushima and then is de-coupled and runs alone to Shinjo. Seating is a 2x2 arrangement on these narrower trains.