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.
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.
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.
| Prefecture | Prefecture (Romaji) |
|---|---|
| 三重県 | MIE KEN |
| 京都府 | KYOTO FU |
| 佐賀県 | SAGA KEN |
| 兵庫県 | HYOGO KEN |
| 北海道 | HOKKAIDO |
| 千葉県 | CHIBA KEN |
| 和歌山県 | WAKAYAMA KEN |
| 埼玉県 | SAITAMA KEN |
| 大分県 | OITA KEN |
| 大阪府 | OSAKA FU |
| 奈良県 | NARA KEN |
| 宮城県 | MIYAGI KEN |
| 宮崎県 | MIYAZAKI KEN |
| 富山県 | TOYAMA KEN |
| 山口県 | YAMAGUCHI KEN |
| 山形県 | YAMAGATA KEN |
| 山梨県 | YAMANASHI KEN |
| 岐阜県 | GIFU KEN |
| 岡山県 | OKAYAMA KEN |
| 岩手県 | IWATE KEN |
| 島根県 | SHIMANE KEN |
| 広島県 | HIROSHIMA KEN |
| 徳島県 | TOKUSHIMA KEN |
| 愛媛県 | EHIME KEN |
| 愛知県 | AICHI KEN |
| 新潟県 | NIIGATA KEN |
| 東京都 | TOKYO TO |
| 栃木県 | TOCHIGI KEN |
| 沖縄県 | OKINAWA KEN |
| 滋賀県 | SHIGA KEN |
| 熊本県 | KUMAMOTO KEN |
| 石川県 | ISHIKAWA KEN |
| 神奈川県 | KANAGAWA KEN |
| 福井県 | FUKUI KEN |
| 福岡県 | FUKUOKA KEN |
| 福島県 | FUKUSHIMA KEN |
| 秋田県 | AKITA KEN |
| 群馬県 | GUMMA KEN |
| 茨城県 | IBARAKI KEN |
| 長崎県 | NAGASAKI KEN |
| 長野県 | NAGANO KEN |
| 青森県 | AOMORI KEN |
| 静岡県 | SHIZUOKA KEN |
| 香川県 | KAGAWA KEN |
| 高知県 | KOCHI KEN |
| 鳥取県 | TOTTORI KEN |
| 鹿児島県 | KAGOSHIMA KEN |
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.
Of course, you can purchase the Japan Postcode Database.
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