Japan Complete Address Format Guide
Japanese postal codes contain seven digits, conventionally split 3-4 with a hyphen and often preceded by the postal mark ใ. Addresses proceed from prefecture to municipality to smaller area. Domestic numbers use a trunk zero before the area or mobile prefix; international format removes it after +81. Tokyo uses 03 domestically, while mobiles commonly use 070, 080, or 090. Japanese native order places family name before given name. Romanized international forms may reverse the order, so systems should store components and display order explicitly.
Standard format
ไฝ่ค ่ต / Sato Aoi โ street โ NNN-NNNN
Example
100-0001 ยท +81 3-1234-5678
Implementation and validation notes
Japanese postal codes contain seven digits, conventionally split 3-4 with a hyphen and often preceded by the postal mark ใ. Addresses proceed from prefecture to municipality to smaller area. Domestic numbers use a trunk zero before the area or mobile prefix; international format removes it after +81. Tokyo uses 03 domestically, while mobiles commonly use 070, 080, or 090. Japanese native order places family name before given name. Romanized international forms may reverse the order, so systems should store components and display order explicitly.
Validate required state, character set, length, and syntax on the client, then repeat validation on the server. Preserve the original input and normalize into a separate field; never truncate local scripts, compound names, or leading zeroes to fit a single Western assumption.
This guide describes common formats rather than an official registry and cannot enumerate every exception. Generated output is for testing only, not delivery, calling, identity verification, or real account activity.
Postal code
NNN-NNNN
Japanese postal codes contain seven digits, conventionally split 3-4 with a hyphen and often preceded by the postal mark ใ. Addresses proceed from prefecture to municipality to smaller area.
Phone
+81 area/subscriber
Domestic numbers use a trunk zero before the area or mobile prefix; international format removes it after +81. Tokyo uses 03 domestically, while mobiles commonly use 070, 080, or 090.
Names
ไฝ่ค ่ต / Sato Aoi
Japanese native order places family name before given name. Romanized international forms may reverse the order, so systems should store components and display order explicitly.
Related resources
Frequently asked questions
What is the standard Japan address format?
A common representation is ไฝ่ค ่ต / Sato Aoi โ street โ NNN-NNNN, for example 100-0001 ยท +81 3-1234-5678. Japanese postal codes contain seven digits, conventionally split 3-4 with a hyphen and often preceded by the postal mark ใ. Addresses proceed from prefecture to municipality to smaller area. Domestic numbers use a trunk zero before the area or mobile prefix; international format removes it after +81. Tokyo uses 03 domestically, while mobiles commonly use 070, 080, or 090. Japanese native order places family name before given name. Romanized international forms may reverse the order, so systems should store components and display order explicitly.
How should Japan address test data be stored?
Store the original value as a string so leading zeroes, spaces, hyphens, accents, and local scripts are preserved. Use a separate normalized field for search.
Does correct formatting prove the data is real?
No. Syntax validation cannot prove an address is deliverable, a number is assigned, or a name belongs to a real person.