"常磐道、4日ぶり開通 新幹線は一部見合わせ続く" [Jōban Expressway opens for the first time in 4 days. Part of the Shinkansen continues to be suspended.] (in Japanese). Jiji Press. 17 February 2021. Retrieved 24 February 2021.
Ministry of Land, Infrastructure and Transport, Tohoku Regional Development Bureau. "Sendai Hokubu Road Profile". Archived from the original on 2008-04-02. Retrieved 2008-04-16.{{cite web}}: CS1 maint: multiple names: authors list (link)
Ministry of Land, Infrastructure and Transport, Tohoku Regional Development Bureau. "Sendai Hokubu Road Profile". Archived from the original on 2008-04-02. Retrieved 2008-04-16.{{cite web}}: CS1 maint: multiple names: authors list (link)