Автозаполнение адреса по почтовому коду в Японии, созданное на основе бесплатных данных Japan Post

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Japanese Postal Code to Address Auto-Fill, Built From Japan Post's Free Data (No API Key)

In Japan, address forms start with the postal code (郵便番号). Users type 7 digits, and the prefecture, city and town fill in by themselves. When a form doesn't do this, Japanese users notice right away — it's one of the clearest signs that a checkout "wasn't made for Japan". I'm a native Japanese developer and I built a checkout plugin for Japanese online stores, so I've written this feature more than once. You don't need a paid API or a third-party script on your checkout page. Japan Post publish