Network & carriers
Japan's mobile market is served by three major carriers — NTT Docomo, KDDI (au), and SoftBank — running some of the most reliable networks in the world.
+81 · JP · UTC+9
Japan
Country Code & Virtual Numbers
Japan's +81 code connects one of the most reliable mobile networks in the world, run by NTT Docomo, KDDI, and SoftBank. Capital: Tokyo · Business hours: 7:00 PM–3:00 AM EST.
// The Basics
What is the +81 country code?
Japan's international dialing code is assigned by the ITU (International Telecommunication Union) and used for every call placed from outside the country.
Numbering format
Japanese numbers drop the leading 0 internationally — a Tokyo landline written domestically as 03-1234-5678 becomes +81 3-1234-5678.
Calling culture
Japanese business calls typically open with a formal greeting and a brief self-introduction (name and company) before moving to the topic — skipping this is considered abrupt.
Did you know
Tokyo's 03 area code has covered the same metropolitan area since Japan consolidated its area codes in 1991, reflecting the city's outsized share of national business activity.
// Quick Facts
A quick read on Japan numbers.
Japanese numbers pair a carrier-assigned mobile prefix with a fixed-length subscriber number, and drop the leading 0 entirely once you're dialing from outside the country. Rozper stores and dials contacts in full E.164 format automatically, so you never have to think about the formatting.
Want to call Japan from abroad? Dial your local exit code, then 81, then the local number.
Best time to call Japan from the US
Japan is on UTC+9 · Business hours = – EST · Mon–Fri
// Why a Virtual Number
Why get a Japan virtual number?
A +81 virtual number gives your business instant local presence in Japan — without the overhead.
Local caller ID in Japan
When you call from your virtual Japan number, contacts see a local +81 number — dramatically improving answer rates.
No office needed
Establish a local presence in Japan without renting space, hiring locally, or installing any hardware.
Instant credibility
Japanese business culture places high value on established, recognizable contacts — a domestic number lowers the barrier to that first conversation.
Routes to any device
Calls to your Japan number ring your team on mobile, desktop, or desk phone — wherever they work.
// Platform Features
Everything to call Japan
The tools to reach Japan contacts reliably and scale your international presence globally.
150+ country coverage
Get virtual numbers in over 150 countries on the same platform — one dashboard, one bill.
HD voice quality
Crystal-clear calls over our optimised global carrier network. No degraded quality from international routing.
Call recording
Every call recorded and transcribed automatically. Review, share, and reference conversations easily.
Voicemail to text
Voicemails transcribed and delivered by email or SMS. Never miss a message across time zones.
CRM auto-logging
All calls to and from your international number auto-logged in Salesforce, HubSpot, or Zoho.
International analytics
Call volume, answer rates, and duration broken down by country, region, and time of day.
Local Caller ID
Show a local country number as your caller ID when dialling internationally. Improves pickup rates significantly.
Instant provisioning
Activate a new country number in under 60 seconds. No contracts, no hardware, no waiting.
99.99% uptime SLA
Enterprise-grade reliability for your international calling infrastructure, 24/7.
// Get Started
Get a Japan number today
Active in under ten minutes. No contracts required.
- 01
Sign up
Create your Rozper account in under 2 minutes. No credit card required to start your free trial.
- 02
Get your number
Browse available numbers in your target country and activate instantly.
- 03
Configure routing
Route calls to any device. Set business hours, voicemail, and IVR from your dashboard.
- 04
Start calling globally
Make and receive international calls immediately. Active in under 10 minutes.
// Complete List
All world dial codes by country.
Every country and territory, every international dial code. Click a country to browse it.
List of World Countries and Their Dial Codes
CountryDial CodeRegionLocal Time
Showing all 237 countries & territories* Local time updates every minute
Frequently Asked
Japan questions answered.
Answers about Japan's carrier landscape, formal calling etiquette, and getting a local +81 virtual number.
The international dialing code for Japan is +81. When calling from the US, dial 011 + 81 + the local number. Rozper handles this automatically.
A Japan virtual number goes live in under 10 minutes. Ask us how.
Start calling Japan, not tomorrow.
Get a virtual Japan number or make direct international calls to +81 — active in under ten minutes.