Japan phone number format
How do you format a Japan phone number?
Write a Japan phone number with the country code +81. A mobile looks like 090-1234-5678 inside Japan and +81 90 1234 5678 from abroad, dropping the leading 0. Mobiles have 10 digits after the country code, and the E.164 form is +819012345678. A format check confirms the digits fit the numbering plan, not that the number is in service.
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Paste your Japan numbers (a mixed list is fine). They are counted here at once; the free checker then gives every number its E.164 form, country and line type, with a file to download.
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See the phone add-onJapan number format at a glance
| Country calling code | +81 |
|---|---|
| International prefix (calling out of Japan) | 010 |
| Trunk prefix (domestic dialling) | 0 |
| Mobile number length | 10 digits after +81 |
| Landline number length | 9 digits after +81 |
| Mobile vs landline from the digits | Yes, separate ranges |
In short: +81, 10 digits for a mobile, drop the leading 0 after +81. The checker below formats any Japan number free in your browser; it can't say whether a line is live. Bulk phone number validator · Pro + Phone plan
Example Japan phone numbers
These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.
| Format | Mobile | Landline |
|---|---|---|
| National (inside Japan) | 090-1234-5678 | 03-1234-5678 |
| International | +81 90 1234 5678 | +81 3 1234 5678 |
| E.164 | +819012345678 | +81312345678 |
How to write a Japan number in E.164
- Remove spaces, dashes, dots and brackets so only digits are left.
- If the number starts with the trunk prefix 0, remove it. It is only used when dialling inside Japan.
- Put +81 in front. The result has 10 digits after the country code for a mobile.
So 090-1234-5678 becomes +819012345678. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.
Mobile or landline?
Japan allocates separate number ranges to mobiles and landlines, so a numbering-plan check reads the line type straight from the digits, for free. That type describes the range the number came from. It doesn’t prove the number is connected today.
Mobile, landline and special number ranges in Japan
A Japan mobile number starts with 601–609, 701–709, 801–809, 901–909 after +81. Every valid number of each type below starts with one of the digit groups shown. A number that starts the right way can still be unassigned: the groups say what a range is for, not that a number is connected.
| Type | Starts with, after +81 | Dialled inside Japan | Digits | Example |
|---|---|---|---|---|
| Mobile | 601–609, 701–709, 801–809, 901–909 | 0601–0609, 0701–0709, 0801–0809, 0901–0909 | 10 | +81 90 1234 5678 |
| Landline (fixed line) | 11–19, 22–29, 31–39, 42–49, 52–59, 61–69, 72–79, 82–89, 92–99 | 011–019, 022–029, 031–039, 042–049, 052–059, 061–069, 072–079, 082–089, 092–099 | 9 | +81 3 1234 5678 |
| Toll-free | 0037, 0066, 0077, 0078, 0088, 120, 800 | 00037, 00066, 00077, 00078, 00088, 0120, 0800 | 8 to 17 | +81 120 123 456 |
| Premium rate | 990 | 0990 | 9 | +81 990 123 456 |
| Universal access (UAN) | 570 | 0570 | 9 | +81 570 123 456 |
| Personal number | 60 | 060 | 9 | +81 60 123 4567 |
| VoIP | 501–509 | 0501–0509 | 10 | +81 50 1234 5678 |
| Pager | 20 | 020 | 10 | +81 20 1234 5678 |
More on Japan’s free-to-call and charged ranges: toll-free and premium numbers in Japan.
Sources, checked 5 November 2026
- Ranges, lengths and examples: Google libphonenumber numbering-plan data (libphonenumber-js 1.13.15), the data our validator uses.
- Official plan: ITU-T E.164 national numbering plan for Japan. The regulator’s filing is the authority when the two disagree.
Validate a list of Japan numbers
Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Pro + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.
Common questions
- What is the country code for Japan?
- The country calling code for Japan is +81. When you call Japan from abroad, dial your international prefix (or +) followed by 81 and the number without its leading 0.
- How many digits is a Japan phone number?
- A Japan mobile number has 10 digits after the country code +81, and a landline has 9. Written for dialling inside Japan, a number gains the trunk prefix 0 in front.
- How do I write a Japan number in international format?
- Start with +81, drop the leading 0, then add the rest of the number. The mobile number 090-1234-5678 becomes +81 90 1234 5678, or +819012345678 in E.164, the form most CRMs and SMS tools expect.
- Can you tell if a Japan number is a mobile?
- Usually, yes. Japan numbers come from ranges allocated separately to mobiles and landlines, so a numbering-plan check reads the line type from the digits. It tells you what the range is for, not whether the number is in service.
- Does a valid format mean a Japan number is in service?
- No. A valid format means the digits fit a range Japan's numbering plan allocates. It cannot tell whether the number is connected today or who carries it, because numbers are reassigned and ported. A live carrier lookup reports the current carrier and line type, but even that does not prove someone answers.
- Can I check a list of Japan numbers for free?
- Yes. Paste them in the list tab above or upload a CSV to the bulk phone number validator: E.164, country, format status and numbering-plan line type are free for every row, with no account. Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month).
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