三角線の愛称が決定しました [Misumi Line nickname announced]. News Release (in Japanese). Japan: Kyushu Railway Company. 16 August 2011. Archived from the original on 3 October 2011. Retrieved 17 August 2011.
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三角線の愛称が決定しました [Misumi Line nickname announced]. News Release (in Japanese). Japan: Kyushu Railway Company. 16 August 2011. Archived from the original on 3 October 2011. Retrieved 17 August 2011.