JR、地元・函館の要望に消極的 リレー列車3両/観光型車両は導入せず [JR to run 3-car relay trains, unresponsive to local wishes, with no plans for tourist trains]. Doshin Web (in Japanese). Japan: The Hokkaido Shimbun Press. 12 September 2014. Archived from the original on 12 September 2014. Retrieved 13 September 2014.
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JR、地元・函館の要望に消極的 リレー列車3両/観光型車両は導入せず [JR to run 3-car relay trains, unresponsive to local wishes, with no plans for tourist trains]. Doshin Web (in Japanese). Japan: The Hokkaido Shimbun Press. 12 September 2014. Archived from the original on 12 September 2014. Retrieved 13 September 2014.