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I spotted these at Nadiff a while back. They’re stamps that let you put your info in and create a QR barcode, readable by most mobile phones. The design is by Groovisions. The official site with more info (in Japanese).
I spotted these at Nadiff a while back. They’re stamps that let you put your info in and create a QR barcode, readable by most mobile phones. The design is by Groovisions. The official site with more info (in Japanese).