ＪＲ東
http://www.jreast.co.jp/press/2017/20180111.pdf
ＪＲ西
http://www.westjr.co.jp/press/article/items/180119_00_honshiya_9.pdf
http://www.westjr.co.jp/press/article/items/180119_00_hokuriku_1.pdf
ＪＲ北
https://www.jrhokkaido.co.jp/press/2018/180119-2.pdf
