Tohoku Main Line (東北本線 Tohoku-honsen) is a 631.3-kilometre railway line operated by the East Japan Railway Company. It starts at Ueno Station in Taito, Tokyo, passes through the cities of Saitama, Utsunomiya, Fukushima, Sendai, and Morioka, and Hachinohe, and ends in Aomori. (The Morioka - Hachinohe segment is operated by the Iwate Ginga Railway and Aoimori Railway.)
The Tohoku Main Line runs mostly parallel to the Tohoku Shinkansen, and upon the Shinkansen's extension to Aomori, the remaining northern portion of the line is expected to be spun off to a third-sector railway operator.
The 159.9-kilometre Ueno-Kuroiso (Nasushiobara , Tochigi) portion of the line is often referred to as the (JR) Utsunomiya Line.
The 29.6-kilometre Tokyo-Omiya (Omiya-ku, Saitama) portion of Keihin-Tohoku Line and the 18.0-kilometre Akabane ((Kita, Tokyo))-Omiya portion of Saikyo Line formally belong to Tohoku Main Line.
