青森站
is located 2.3 km north of Naka-Oguni, between Naka-Oguni and Ōdai / Tsugaru-Imabetsu. Up until this point, the Tsugaru Line and Kaikyō Line shared the same tracks from Aomori Station. The junction also marks the border between the electrified portion of the Tsugaru Line (Aomori to Naka-Oguni) and the non-electrified portion (Naka-Oguni to Minmaya), as well as the border between JR East and JR Hokkaido. Also, The Hokkaido Shinkansen tracks from Shin-Aomori Station merge with the Kaikyō Line tracks immediately north of the Junction.