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World Postal Code > Asia Zip Code > Japan Zip Code

Japan ZIP Code Dataset

Comprehensive Japan zip code data with accurate geographic coordinates, administrative divisions, and time zone
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Sample Dataset Japan

ISOCountryLanguageRegion 1Region 2Region 3Region 4LocalityZip CodeLatitudeLongitudeTimezone
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Adachi120-001535.765335139.805818Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Aoi120-001235.772448139.815443Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Aoi121-001235.777148139.817625Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Ayase120-000535.760669139.822353Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Chuohoncho120-001135.769443139.805679Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Chuohoncho121-001135.775335139.808458Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hanahata121-006135.798976139.81135Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashiayase120-000435.765938139.830332Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashihokima121-006335.793765139.813533Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashiiko121-080135.80292139.790912Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashirokugatsucho121-007135.788041139.804173Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hinodecho120-002135.750498139.810616Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hirano121-007635.785741139.807587Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hitotsuya121-007535.783244139.810342Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hokima121-006435.794365139.808072Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Horinochi123-087435.77651139.757116Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hozukacho121-007235.785933139.811297Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Iko121-082335.791337139.780519Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Ikohoncho121-080735.796995139.787871Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Iriya121-083635.808292139.757385Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Iriyamachi121-083435.799719139.770467Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kaga123-086135.787839139.757349Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kahei121-005535.780247139.826918Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kitakaheicho121-005635.784161139.830396Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kodo120-001335.766946139.810343Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kohoku123-087235.770425139.764744Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kojiya121-083335.799686139.776281Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kojiyahoncho121-083235.803602139.774919Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kurihara123-084235.780867139.789522Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Minamihanahata121-006235.790429139.82053Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Miyagi120-004735.75846139.756126Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Motoki123-085335.763627139.7862Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Motoki Higashimachi123-085435.766904139.781664Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Motoki Kitamachi123-085735.765354139.779648Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.足立120-001535.765335139.805818Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.青井120-001235.772448139.815443Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.青井121-001235.777148139.817625Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.綾瀬120-000535.760669139.822353Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.中央本町120-001135.769443139.805679Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.中央本町121-001135.775335139.808458Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.花畑121-006135.798976139.81135Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東綾瀬120-000435.765938139.830332Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東保木間121-006335.793765139.813533Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東伊興121-080135.80292139.790912Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東六月町121-007135.788041139.804173Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.日ノ出町120-002135.750498139.810616Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.平野121-007635.785741139.807587Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.一ツ家121-007535.783244139.810342Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.保木間121-006435.794365139.808072Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.堀之内123-087435.77651139.757116Asia/Tokyo
ISOCountryLanguageRegion 1Region 2Region 3Region 4LocalityZip CodeLatitudeLongitudeTimezone
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Adachi120-001535.765335139.805818Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Aoi120-001235.772448139.815443Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Aoi121-001235.777148139.817625Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Ayase120-000535.760669139.822353Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Chuohoncho120-001135.769443139.805679Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Chuohoncho121-001135.775335139.808458Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hanahata121-006135.798976139.81135Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashiayase120-000435.765938139.830332Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashihokima121-006335.793765139.813533Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashiiko121-080135.80292139.790912Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Higashirokugatsucho121-007135.788041139.804173Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hinodecho120-002135.750498139.810616Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hirano121-007635.785741139.807587Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hitotsuya121-007535.783244139.810342Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hokima121-006435.794365139.808072Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Horinochi123-087435.77651139.757116Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Hozukacho121-007235.785933139.811297Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Iko121-082335.791337139.780519Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Ikohoncho121-080735.796995139.787871Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Iriya121-083635.808292139.757385Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Iriyamachi121-083435.799719139.770467Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kaga123-086135.787839139.757349Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kahei121-005535.780247139.826918Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kitakaheicho121-005635.784161139.830396Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kodo120-001335.766946139.810343Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kohoku123-087235.770425139.764744Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kojiya121-083335.799686139.776281Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kojiyahoncho121-083235.803602139.774919Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Kurihara123-084235.780867139.789522Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Minamihanahata121-006235.790429139.82053Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Miyagi120-004735.75846139.756126Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Motoki123-085335.763627139.7862Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Motoki Higashimachi123-085435.766904139.781664Asia/Tokyo
JPJapanENKantoTokyoAdachiThis level doesn’t exist for this country.Motoki Kitamachi123-085735.765354139.779648Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.足立120-001535.765335139.805818Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.青井120-001235.772448139.815443Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.青井121-001235.777148139.817625Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.綾瀬120-000535.760669139.822353Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.中央本町120-001135.769443139.805679Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.中央本町121-001135.775335139.808458Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.花畑121-006135.798976139.81135Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東綾瀬120-000435.765938139.830332Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東保木間121-006335.793765139.813533Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東伊興121-080135.80292139.790912Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.東六月町121-007135.788041139.804173Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.日ノ出町120-002135.750498139.810616Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.平野121-007635.785741139.807587Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.一ツ家121-007535.783244139.810342Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.保木間121-006435.794365139.808072Asia/Tokyo
JP日本JA関東地方東京都足立区This level doesn’t exist for this country.堀之内123-087435.77651139.757116Asia/Tokyo
See all data

Showing postal codes

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Explore Our Japan ZIP code coverage

The map shows our Japan postal code coverage with major cities and postal code distribution.

Japan's Postal Code Format

Japan uses a “郵便番号” (Yubin Bango) system, which is a seven-digit numeric format like 999-9999, with a hyphen separating the third and fourth digits. Unlike US ZIP codes, which contain 5 digits, Japanese postal codes use a 7-digit format. The first three digits indicate the postal district, and the last four digits specify the delivery area. According to the GeoPostcodes world postal code database, Japan has 142,608 postal codes covering 2,338 regions and 119,002 towns.

  • Postal Code Format: 999-9999

    • Seven-digit numeric format with a hyphen after the third digit
    • First three digits = postal district; last four digits = delivery area
    • Optimized for routing rather than strict alignment with administrative divisions
    • 142,608 postal codes covering 2,338 regions and 119,002 towns

    Regional Examples:

    • 100-0001 - Chiyoda, Tokyo
    • 530-0001 - Osaka, Osaka Prefecture
    • 460-0001 - Nagoya, Aichi Prefecture
    • 060-0001 - Sapporo, Hokkaido

  • Structure of Postal Codes

    • Format: 7-digit numeric with a hyphen (e.g., 100-0001).
    • Hierarchical levels: First three digits = postal district; last four digits = local delivery area. Codes may overlap municipalities for routing efficiency.
    • Key challenges: Some postal codes cover multiple administrative units; business-only ZIPs require distinct handling.

  • Management & Authority

    • Primary postal authority: Japan Post.
    • Update frequency: Frequent releases by Japan Post; integrated into GeoPostcodes 1–2 times per year.

  • Addressing Standards

    • Common address format: Postal code → Prefecture → Municipality (city/ward/district) → Town/Village → *Aza/Oaza* → Block → Building number.
    • Administrative divisions used: Prefectures (47), municipalities, towns/villages, *Oaza* and *Aza* subdivisions.
    • Notes: Tokyo’s 23 wards act as special municipalities directly under the prefecture, unlike elsewhere in Japan.

  • Special Characteristics

    • No traditional street names; addresses rely on block chome-ban-go and building numbers.
    • Business postal codes may not correspond to the physical location of delivery.
    • Japanese suffixes (e.g., “shi” = city, “ku” = ward, “gun” = district) are included in native data but removed in Romanized formats.
    • Tokyo’s wards are exceptions in the hierarchy, functioning at a higher administrative level than standard wards.

Our location dataset for Japan

Japan ZIP & Administrative boundaries

Comprehensive boundary data from GeoPostcodes for all Japan postal codes, provinces, territories, and administrative divisions.

Japan Shapefiles

Japan Administrative Divisions

The database follows a standardized and unified structure you can integrate without becoming an expert in each country’s unique administrative hierarchy.

Japan Administrative Divisions

Key Features:

  • 247 countries
  • Unified global hierarchy
  • Up to 5 administrative levels
  • Includes complex geographies

Japan Address Format

The GeoPostcodes database ensures addresses follow the correct format for Japan, ensuring a smooth address validation experience.

Our database offers comprehensive address validation to reduce delivery errors and improve efficiency.

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Coverage Statistics

142,608

Total ZIP Codes

2,338

Provinces & Territories

119,002

Cities & Towns

Available File Formats

Choose from multiple data formats to seamlessly integrate Japan postal code data into your systems
CSV Format

Comma-separated values for
spreadsheet applications and data analysis tools

GeoJSON Format

JavaScript Object Notation for
web applications and modern development

GML Format

Extensible Markup Language for enterprise systems and legacy applications

DAT Format

Database-ready SQL scripts for
direct import into your systems

Data Dictionary

Comprehensive field definitions and data specifications for the Japan postal code dataset
Field nameField typeDescriptionComments
ISOChar(2)ISO 3166-1 Country codeThe ISO 3166-1 standard is published by the International Organization for Standardization (ISO) and defines a unique code for the name of each country. The country codes are represented as a two-letter code (alpha-2).
CountryChar(50)Country name
LanguageChar(2)Language codeWhen there are several official languages in the country, or for countries using a non-Latin alphabet, we provide the names in different languages. The language field contains the language code and allows you to select a specific version.
Region1
Region2
Region3
Region4
Char(80)
Administrative division level 1
Administrative division level 2
Administrative division level 3
Administrative division level 4
These fields contain the name of administrative divisions for each available level. If not applicable, the value '-' will be indicated.
LocalityChar(80)Locality nameContains the settlement name. The type of settlement may vary depending on the country (city, town, village, etc..).
PostcodeChar(15)ZIP / Postal codeIn countries/places where there is no postal code in use, this field is left empty. The postcode structure varies for each country.
Latitude
Longitude
DoublePlace coordinates (WGS84 coordinates)These fields contain the geographic coordinates related to the specific locality and postal code of the record. The geographical position is usually precise to about one hundred meters and corresponds to the center of the locality. All our files are created using the World Geodetic System standard WGS 84. The corresponding SRID reference is EPSG:4326.
TimezoneChar(30)Time zone name (Olson)Following the timezones defined in the IANA tz database (sometimes called Olson database).

Why choose GeoPostcodes

Global coverage

Complete coverage across 247 countries, including hard-to-source geographies like China, Japan, Brazil, and Russia.

Highest quality

Built on extensive, authoritative sourcing with robust data engineering and quality control. Standardized and up-to-date.

Expert Consulting

With 15 years of experience, we guide your implementation and deliver data in the format that fits your system.

Discover more advantages

Global Location Databases

Comprehensive location data products serving businesses, and
organizations worldwide with accurate, up-to-date geographic information.

GeoPostcodes-Zip code database

Postal Code Database

Global dataset containing all administrative divisions, cities and zip codes.

Explore postal code database

Key features

  • 247 Countries
  • 9,9M Coordinates
  • 9,3M Postal Codes
  • 400 Time zones
  • 4M Cities and Towns
  • 116K UNLOCODES

Specifications

  • Coverage: Global
  • Format: CSV, ASC, DAT, GML, GeoJSON, KML, Shapefile (SHP)

Boundary Data

A global dataset of polygons representing postal codes and administrative areas.

Explore boundaries database

Key features

  • 247 Countries
  • Up to 6 levels
  • 1,7M boundaries
  • High-precision
  • 245K Admin areas
  • Visualization

Specifications

  • Coverage: Global
  • Format: GeoJSON, Geopackage, KML, Shapefile (SHP)
GeoPostcodes - population

Population Database

Global population estimates at postal code and administrative level covering a span of 55 years: past, present, and future.

Explore population database

Key features

  • 247 Countries
  • 243K Admin areas
  • 55 year span
  • Yearly updates
  • 645K ZIP codes

Specifications

  • Coverage: International
  • Format: CSV, ASC
GeoPostcodes-Streets Database

Address Database

International dataset with all administrative areas, cities, streets, and relevant postal codes.

Explore address database

Key features

  • 81 Countries
  • 299 languages
  • 26,5M streets
  • 400 time zones
  • 9.3M ZIP codes
  • 4M cities

Specifications

  • Coverage: International
  • Format: CSV, ASC, DAT, GML, KML, Shapefile (SHP), GeoJSON

Use Cases for Postal Data

From address validation to market analysis, our postal code data powers
key operations

Address Validation

Capture accurate addresses for every country and territory in the world, in any language, and match local requirements.

Reporting and Business Intelligence

Ensure accurate and consistent reports across your organization. Enhance data analysis with location intelligence.

Logistics and Shipping

Design and optimize your distribution network, plan your pick-up and drop-off locations, reduce costs and improve visibility over your shipping.

Map and Visualization​

Analyze complex trends and discover actionable insights. Build engaging and intuitive map-based data visualizations.

Sales and Marketing

Segment customers for site selection, analytics, geofencing, campaigns, mapping, and targeted ads.

Discover more advantages

Global Postal Code Coverage

247 countries and territories with standardized formatting and reliable geographic information.

Related Countries

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ZIP code data

Bhutan

Bhutan

ZIP code data

Brunei Darussalam

Brunei Darussalam

ZIP code data

Cambodia

Cambodia

ZIP code data

China

China

ZIP code data

Taiwan

Taiwan

ZIP code data

India

India

ZIP code data

Indonesia

Indonesia

ZIP code data

Kazakhstan

Kazakhstan

ZIP code data

Kyrgyzstan

Kyrgyzstan

ZIP code data

Laos

Laos

ZIP code data

Malaysia

Malaysia

ZIP code data

Maldives

Maldives

ZIP code data

Mongolia

Mongolia

ZIP code data

Myanmar

Myanmar

ZIP code data

Nepal

Nepal

ZIP code data

Pakistan

Pakistan

ZIP code data

Continents Coverage

North America
Europe
Africa
Asia
Middle East
Oceania-Pacific
South & Central America

Ready to Get Started?

Download our sample Japan postal code dataset.
Download Sample Data

Frequently Asked Questions

Tokyo has many postal codes. For central Tokyo (Chiyoda) an example 郵便番号 is 100-0001.
Japan does not use 5-digit ZIP codes; its postal codes (郵便番号) are seven digits in the format 999-9999. A five-digit number would be incomplete—use the full 7-digit postal code.
Yes. Japan uses postal codes (郵便番号), commonly referred to as ZIP codes, formatted as three digits, a hyphen, then four digits (e.g., 123-4567).
Yes. Japan uses postal codes (郵便番号) nationwide, formatted as seven digits with a hyphen like 999-9999.
No town in Japan has the ZIP code 12345. Japanese 郵便番号 use a seven-digit format (e.g., 123-4567), so 12345 does not match any official postal code.
Yes. Japan uses postal codes (郵便番号) similar to U.S. ZIP codes: seven digits written as 999-9999, used to sort and route mail across the country.
Yes. Japan uses a postal code system (郵便番号) formatted as three digits, a hyphen, and four digits (e.g. 123-4567). It’s used nationwide for mail sorting and addressing.
The country calling code for Japan is +81; this is sometimes mistaken for a ZIP code by those unfamiliar with the Japanese 郵便番号 format (999-9999).
Write the postal code first (郵便番号) in 999-9999 format, then prefecture, city/ward, neighborhood, chōme‑ban‑gō (block and house numbers), building name and apartment number, and recipient name. Example:

郵便番号 123-4567
東京都 千代田区 神田一丁目 1-2-3
丸の内ビル 101号室
山田 太郎 様

Japan does not have a single ZIP code. Postal codes (郵便番号) are seven digits in the format 999-9999 and are assigned to specific prefectures, cities, towns, and neighborhoods; provide a city or address to get the exact code.
The postal code format in Japan is 999-9999 — seven digits with a hyphen after the third digit; it is referred to as 郵便番号.
A ZIP code (郵便番号) in Japan consists of seven digits, usually written with a hyphen after the first three (format: 123-4567).
Yes. Addresses in Japan include a postal code (郵便番号). It is a seven-digit code written as 999-9999 and is usually placed before the prefecture/city line or in a dedicated box at the top of the address to aid mail sorting.
ZIP code 100-0001 in Japan (郵便番号 100-0001) corresponds to the Chiyoda area of Chiyoda Ward, Tokyo Metropolis (千代田区千代田), in central Tokyo near the Imperial Palace.
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