「現金お断り」と法貨（十字路） – 日本経済新聞
「現金お断り」と法貨（十字路） 日本経済新聞
スマートフォンを利用するモバイル決済を中心に、キャッシュレスの新たな仕組みが続々登場する。それによって手に入るデータを利用してビジネスを活性化したいと期待が …
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