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平成23年春ダイヤ改正 [Spring 2011 timetable revision] (Press release) (in Japanese). JR Kyushu. 17 December 2010. Archived from the original on 20 December 2010. Retrieved 19 December 2010.
web.archive.org
平成23年春ダイヤ改正 [Spring 2011 timetable revision] (Press release) (in Japanese). JR Kyushu. 17 December 2010. Archived from the original on 20 December 2010. Retrieved 19 December 2010.