The Nihonkai-Tōhoku Expressway (日本海東北自動車道, Nihonkai Tōhoku Jidōsha-dō) is a national expressway in Japan. It is owned and operated by East Nippon Expressway...

Infrastructure, Transport and Tourism. Retrieved 22 January 2021. "日本海沿岸東北自動車道（二ツ井白神～あきた北空港）計画段階評価について" [Evaluation of the planned sections of the Nihonkai-Tōhoku...