Tōhoku Shinkansen
On 1 December 2002, with the opening of the Tōhoku Shinkansen, the portion of the Tōhoku Main Line located in Iwate Prefecture became the Iwate Galaxy Railway Line, and the portion in Aomori Prefecture from the Iwate border to Hachinohe Station became the Aoimori Railway Line. With the opening of the Tōhoku Shinkansen extension to on 4 December 2010, the Tōhoku Main Line tracks between Hachinohe and Aomori were transferred from JR East to the Aoimori Railway Company, resulting in the completion of the Aoimori Railway Line.