そのキャッシュレス、本当にスマホやQRが必要ですか？（ITmedia Mobile） – Yahoo!ニュース
そのキャッシュレス、本当にスマホやQRが必要ですか？（ITmedia Mobile） Yahoo!ニュース
2018年以降、QRコード（バーコード）を用いたモバイル決済サービスが多数登場した。
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