消費者は嬉しいかも、だけど… JR東「Suicaでポイント還元」の事情（J-CASTニュース） – Yahoo!ニュース
消費者は嬉しいかも、だけど… JR東「Suicaでポイント還元」の事情（J-CASTニュース） Yahoo!ニュース
JR東、独自にポイント還元 エキナカなど増税時検討 中小に対抗」――2018年12月5.
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