This website provides comprehensive postal code information for Japan, covering all 47 prefectures, 1,890 municipalities (cities, wards, towns, and villages), and 87,065 town-level areas. Whether you’re searching for a specific 7-digit postcode or exploring the address hierarchy behind it, our platform delivers accurate, up-to-date, and reliable data for all regions of Japan.

Definition of the Japanese Postal Code System

• What is the format of the Japanese postal code?

  Japan’s postal codes consist of 7 digits in the format NNN-NNNN. The first three digits represent a broad postal area served by a major distribution center. The last four digits identify a more specific delivery zone such as a town, neighborhood, or block.

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Japan Prefecture List

Here is the complete list of Japan’s 47 prefectures. Click any prefecture to explore its cities, towns, and corresponding postal codes down to the neighborhood or block level.

Facts about Japan Post & Postal Code

• How do I search for postal codes on the website?

  Use the search bar at the top of the page to enter a prefecture, city, town, or a full 7-digit postal code to retrieve detailed information.

• Can I download postal code data for Japan?

  Of course, you can purchase the Japan Postcode Database.

For more questions, please visit our FAQs.