"平成19(2007)年 新潟県中越沖地震における 災害救助に係る活動記録" [Activity record related to disaster relief following the 2007 Niigata Chuetsu-offshore earthquake] (PDF) (in Japanese). Japanese Red Cross. May 2008. Retrieved 29 January 2021.
"平成19年新潟県中越沖地震" [2007 Niigata Chuetsu-oki Earthquake] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. 23 July 2007. Retrieved 28 January 2021.
mlit.go.jp
"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.
ndl.go.jp
warp.ndl.go.jp
"4月1日から国道116号のルートが変わります" [From 1 April, Route 116 will be changed] (PDF) (in Japanese). 29 February 2008. Retrieved 29 January 2021.
"新潟西バイパス速度規制の見直しについて" [About the review of the Niigata Bypass speed limit] (PDF). Ministry of Land, Infrastructure, Transport and Tourism. 19 March 2007. Retrieved 29 January 2021.
wikisource.org
ja.wikisource.org
一般国道の路線を指定する政令 [Cabinet Order Designating General National Routes] (in Japanese). Cabinet of Japan. 1965. Retrieved 28 January 2021 – via Wikisource.