Japan (+81 / 0081): 9 to 10 digits
Locals write 090-1234-5678. An API wants +819012345678. Paste any Japan number below to see it normalised, validated, and identified.
# free & rate-limited · no signup · live results from the same engine as the API
Since the engine is the same one the API runs, a key does not buy you a better answer. It buys volume, bulk jobs and a signed receipt.
How Japan numbers are written
- Country calling code
- +81
- Dialled from abroad
- 0081 (011 81 from the US and Canada)
- ISO country code
- JP
- National number length
- 9 to 10 digits
- Trunk prefix
- 0 (dropped in E.164)
- Written locally
- 090-1234-5678
- E.164 format
- +819012345678
What +81 means
+81 is the country calling code for Japan. The same code is written 0081 when you dial out from most of Europe, Africa and Asia, and 011 81 from the US and Canada. All three reach the same place: only the exit code in front of it changes. Whichever one you use, the national trunk 0 is dropped once the country code is in front.
Mobile numbers
Mobiles start with 70, 80 or 90 (written 070, 080, 090 nationally).
Converting to E.164
Take the number as written locally (090-1234-5678), drop the leading 0, then prefix +81. The result is +819012345678: no spaces, no dashes, no parentheses. Store that, and format for display only when you show it to a human.
Why not do it with a regex
A pattern that matches Japan numbers today breaks the moment a new mobile range is allocated, and it cannot tell you whether the number is actually assigned. The tool above runs the same numbering-plan engine as our phone validation API, so it also reports line type and region rather than just shape.
Japan mobile prefixes
- 070
- Mobile
- 080
- Mobile
- 090
- Mobile
A prefix tells you the range a number was issued from, not which network holds it today — numbers move between operators. For the current carrier you need a live lookup, which is what our phone API returns.
Japan area codes by city
- Tokyo
- 03
- Osaka
- 06
- Yokohama
- 045
- Nagoya
- 052
- Kyoto
- 075
- Fukuoka
- 092
- Sapporo
- 011
Tokyo and Osaka are two-digit area codes; mobiles look like area codes but are not
03 is Tokyo and 06 is Osaka. Almost every other city uses a three-digit code such as 045 or 075. 070, 080 and 090 look the same shape as those city codes and are not geographic: they are the mobile ranges. Splitting a Japanese number at a fixed offset will put the subscriber part in the wrong place for half the country.
Japan phone numbers, answered
What country is +81?
+81 is Japan. Written 0081 from most of the world and 011 81 from the US and Canada. Drop the leading 0: 090-1234-5678 locally is +819012345678 internationally.
How many digits is a Japanese phone number?
A mobile is ten digits after +81 (eleven as written at home with 070, 080 or 090). A landline is the area code plus the subscriber number, so the total is 9 or 10 after the country code.
Do Japanese mobiles start with 070, 080 or 090?
Yes. Those three ranges are mobile. Internationally the 0 is dropped, so 090-1234-5678 becomes +81 90 1234 5678. The prefix does not tell you which network holds the number today.
That is how a Japan number is written. Whether a whole list is worth dialling is the free call list cleaner, or check one number on the spam phone checker.