Hole-in-the-wall izakayas (traditional bars), ryokan (traditional inns), and Shinto shrines often accept cash only. STR/Getty ImagesTake Japan's millions of vending machines. The Japan Vending Machine Manufacturers Association recently said that almost 80% of the country's machines would need upgrades to accept the new notes, per comments reported by Reuters. Vending machines are a common sight in Japan. If they're stopping by a vending machine there anytime soon, they may want to check first if their bills will work.

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Persons: —, Omotesando, Bank of Japan — Organizations: Service, Business, Kansai region's, Japan Vending Machine Manufacturers Association, Reuters, Bank of Japan Locations: Japan, Ginza, Tokyo, Kansai, Kansai region's Osaka