National Route 18 (国道18号, Kokudō jūhachi-gō) is a national highway connecting Takasaki and Joetsu, Niigata in Japan.[2] A section of the highway is designated as a part of the Japan Romantic Road.[3]
^"一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 19 February 2020.
^一般国道18号 (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Kanto Regional Development Bureau. Archived from the original on 28 September 2011. Retrieved 29 November 2010.
^"Japan Romantic Road". japan-guide.com. 13 May 2020. Retrieved 18 February 2021.
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