道南いさりび鉄道、ロゴマークを発表…津軽海峡をモチーフ [South Hokkaido Railway Company unveils logo - Tsugaru Straits motif]. Response (in Japanese). Japan: IID Inc. 23 March 2015. Retrieved 24 March 2015.
shr-isaribi.jp
Dōnan Isaribi Tetsudō (2015). "事業報告書 (Annual Report)"(PDF) (in Japanese). p. 2. Retrieved 2016-07-01.
South Hokkaido Railway Company (27 March 2015). "鉄道事業許可申請について" [Application for Railway Business Permission] (PDF) (in Japanese). Retrieved 28 March 2016.
South Hokkaido Railway Company. "路線図・駅情報" (in Japanese). Retrieved 3 April 2016.