Most trains ran coupled with 200 series Yamabiko trainsets between Tokyo and Morioka, but three return workings ran coupled with newly introduced E2 series sets, running at a maximum speed of 275 km/h (170 mph) between Utsunomiya and Morioka, and giving a fastest journey time of 3 hours 49 minutes between Tokyo and Akita (an average speed of 163.4 km/h).

[4] From 16 March 2013, new Super Komachi (スーパーこまち) services started, using new E6 series trains running at a maximum speed of 300 km/h (185 mph) on the Tohoku Shinkansen.

[5] Initially, a fleet of four trains was used to operate four return services daily between Tokyo and Akita.

[5] From the start of the revised timetable on 15 March 2014, all services were operated by E6 series trains, and the name was returned to simply Komachi.

[2] At the same time, the maximum speed on the Tohoku Shinkansen (on the section between Utsunomiya and Morioka[6]) was further raised to 320 km/h (200 mph).