地球にやさしい“蓄電池電車”「ＤＥＮＣＨＡ」運行開始 ＪＲ筑豊線 [Environmentally friendly "Dencha" battery train enters service on JR Chikuho Line]. Sankei West (in Japanese). Japan: The Sankei Shimbun & Sankei Digital. 19 October 2016. Archived from the original on 19 October 2016. Retrieved 19 October 2016.
tetsudo-shimbun.com
JR九州、819系「DENCHA」デビューへ エコでスマートな“蓄電池電車” [JR Kyushu to introduce 819 series "DENCHA" - an economical and smart battery train] (in Japanese). Japan: Tetsudo Shimbun. 29 January 2016. Retrieved 29 January 2016.
web.archive.org
地球にやさしい“蓄電池電車”「ＤＥＮＣＨＡ」運行開始 ＪＲ筑豊線 [Environmentally friendly "Dencha" battery train enters service on JR Chikuho Line]. Sankei West (in Japanese). Japan: The Sankei Shimbun & Sankei Digital. 19 October 2016. Archived from the original on 19 October 2016. Retrieved 19 October 2016.
