Validate Japanese addresses
before the order is placed.

Stores located outside Japan that ship to customers in Japan, such as Korean beauty brands, D2C brands in the US and Europe, and cross-border stores that fulfil through a Japanese 3PL. It validates Japanese shipping addresses that customers type in Latin characters.

Whether the postal code exists, whether the prefecture and city match that postal code, whether the address line contains the town for that postal code, whether a house number is present, and whether the city or address fields contain Japanese characters. All checks run against Japan Post data.

No. Shopify’s built-in address suggestions only fill in fields; they do not block an order when the postal code, city, and address line disagree, or when the house number is missing. Checkout Address Validator adds that check on top of the standard checkout and stops the order until the address is corrected.

Postal code as seven digits (150-0001), the prefecture (Tokyo), the city or ward (Shibuya), and the address line with the town followed by the block and house number (Jingumae 1-2-3). Shopify fills in the prefecture and city from the postal code; the customer adds the town and house number. The app checks each of these fields against Japan Post data.

No. Common spelling variations of the same place are accepted: Shinbashi or Shimbashi, Osaka or Oosaka or Ohsaka, Shibuya-ku or Shibuya City or Shibuya Ward, the ward written before or after the city, and the house number before or after the town. Upper and lower case, commas, and the hyphen in the postal code do not matter either. An error only appears when the address points to a different place than the postal code.

No. The app only validates. When something is off, it shows an error under the field with the expected value, and the customer corrects the address before placing the order. What the customer typed is never changed.

The order is blocked with a message asking the customer to re-enter the field in Latin characters, because most international shipping labels cannot print kanji or kana. If your customers are meant to type Japanese, use the Japanese address mode described in the next question.

English and Japanese messages are built in, and the checkout shows the one that matches the customer’s checkout language. You can edit every message in the app settings.

Yes. The app has a separate mode for addresses written in Japanese, which is what domestic carriers in Japan expect. The mode is chosen automatically when you install, based on your store’s country and shipping destinations, and you can switch it in Settings.

Yes. Validation is built into the checkout itself through Shopify Functions, so orders placed through Shop Pay, Apple Pay, Google Pay, PayPal, and other express checkouts are validated too. How the message is displayed depends on each wallet's UI, so we recommend placing a test order during setup.

No. The app runs on Shopify Functions and works on every Shopify plan from Basic and up.

Yes. The Free plan covers up to 100 orders a month with every feature included, indefinitely. Paid plans include a 7-day free trial.

No. Validation runs inside Shopify Checkout with no calls to external servers, so page load and typing stay as fast as before. No customer data is stored on our servers.