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Japan and Korea Payment Guide: Fragmented Methods in Japan and the Wallet Economy in Korea

Japan and Korea both look like high-card-penetration developed markets, but the difficulty of collecting money sits in completely different places. Japan is extremely fragmented — cards are only one slice, with convenience store cash, bank transfers and carrier billing each holding real share, and all of them asynchronous. Korea is a market where everyone can take cards, so the difference lies in whether you can connect every local method at once and whether payments become an account relationship. Read separately, the two produce different conclusions.