Japan country code, +81 explained.
Everything you need to call Japan with Twiching — full dialing format, step-by-step guide, and Tier-1 CLI routes that land every call.
Japan
Tokyo · Asia
· COUNTRY INFO · VERIFIED
- ISO Alpha-2
- JP
- Capital
- Tokyo
- Region
- Asia
- Timezone
- UTC+9
· DIALING GUIDE · VERIFIED
FULL DIAL FORMAT
011 · +81 · XX · XXXXXXXX
How Japan numbers break down
A complete number to Japan follows this pattern. Twiching adds the exit and country codes automatically when you dial from the app.
EXIT CODE
Dial from the US/Canada to leave the country.
COUNTRY CODE
Routes the call directly into Japan.
AREA / MOBILE
Regional or mobile prefix — drop the leading 0.
LOCAL NUMBER
The subscriber's local number.
COMPLETE NUMBER FORMAT
011 · +81 · XX · XXXXXXXX
Japan on the map
Tokyo · Asia
ROUTE
Tier-1 Direct
CLI
Verified
ASR
60%+ min
How to call Japan
Click any step — watch the full dial string build piece by piece.
FULL NUMBER FORMAT
011 · +81 · XX · XXXXXXXX
Twiching automatically adds the exit and country codes — just enter the local number.
Japan —
connected across every carrier.
191
Countries in directory
JAPAN INCLUDED
99.97%
Call delivery rate
STIR/SHAKEN
500+
Carrier interconnects
TIER-1 DIRECT
60%+
Guaranteed ASR
REAL-TIME ROUTING
Japan
Asia · JP
Japan numbering plan & how to dial
Dialing into Japan means working with an open numbering plan under country code +81: a 2-digit prefix plus a 8-digit subscriber number, 10 digits total. Locally, numbers usually carry a leading "0" that gets dropped when calling Japan from outside the country.
Mobile coverage in Japan comes from 3 major networks — NTT, SoftBank, KDDI — with internet penetration at 93%. VoIP is permitted and regulated by MIC Japan. Language (Japanese) and currency (JPY) both matter here for IVR, SMS, and scheduling support around local business hours.
Asian markets range from fully liberalised to licensed-only VoIP, so compliant routing and correct local caller ID have an outsized effect on answer rates.
Skipping the exit code
From the US you must dial 011 before the +81 country code to reach Japan.
Keeping the national trunk "0"
That leading 0 on a Japan number is for domestic calls only; leave it out when dialing in after +81.
Ignoring the time difference
Before dialing Japan, check the local clock — it runs on UTC+9, and off-hours calls tend to go unanswered.
Permitted — MIC regulated
Regulated by MIC Japan
- Act on Protection of Personal Info
- MIC VoIP guidelines
- 050 prefix for VoIP
US → Japan
$0.010/min
per minute
Japan → US
$0.010/min
per minute
Business calling to Japan
Local JP caller ID
Present a Japan +81 number so prospects in Tokyo and nationwide recognise the call and are more likely to answer.
Asia outbound & support
Run sales and support lines into Japan over Tier-1 routes that interconnect with networks like NTT.
Follow-the-sun coverage
Staff Japan hours (UTC+9) with routing that sends calls to the right team at the right local time.
FAQ
Calling Japan — frequently asked questions
Yes, where locally supported — a single Twiching Japan number can handle both voice calls and SMS. That avoids the overhead of provisioning and managing two separate numbers for one customer-facing line.
No — Japan isn't part of the NANP. It has its own country code, +81, under the international E.164 numbering system, which is why calls from the US need the 011 exit code first.
Yes. VoIP is permitted in Japan, regulated by MIC Japan, so businesses can run cloud numbers and SIP termination on compliant routes. There's no special licensing hurdle for a Twiching customer to clear before calling or texting into Japan.
Japan has 93% internet penetration, which is a useful signal for how reliably VoIP and SMS-based channels will perform there. Higher penetration generally means more consistent call quality and app-based delivery for messaging.
Over Tier-1 direct interconnects with major local networks like NTT, rather than lower-quality wholesale transit routes. That direct-carrier approach is what keeps delivery rates and call clarity high.
3 major networks serve Japan: NTT, SoftBank, KDDI. Twiching interconnects directly with these carriers over Tier-1 routes rather than relying on third-party transit.
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