Which Shinkansen service runs between Morioka and Akita on converted conventional tracks?

The Akita Shinkansen service runs between Morioka and Akita on converted conventional tracks.

The route opened on March 22, 1997, after JR East converted the Tazawako Line between Morioka and Ōmagari and part of the Ōu Main Line between Ōmagari and Akita. At Morioka, trains connect directly with the Tōhoku Shinkansen, allowing through service to and from Tokyo.

Akita is a mini-Shinkansen rather than a wholly new, full-standard high-speed line. Its route retained the narrower dimensions of conventional railway infrastructure, so trains are specially designed and run at much lower speeds—typically up to 130 km/h—between Morioka and Akita.

The service is commonly associated with Komachi trains, now operated with seven-car E6 series sets. The Hokkaido, Kyushu, and Yamagata Shinkansen are separate routes; Yamagata is also a mini-Shinkansen, but it serves Yamagata Prefecture rather than Akita.