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?
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.
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.
Free tools
Look up a number from Japan
Phone number checkerCheck the country and format of a number from Japan instantly.Phone number validatorValidate a number against its country's formatting rules (E.164).Carrier lookupCheck a number's country and format for free; live carrier data comes with the Lookup API.All country codesDialing codes, time zones and calling guides for every country.
Frequently Asked
Japan questions answered.
Answers about Japan's carrier landscape, formal calling etiquette, and getting a local +81 virtual number.
Dial 011 (the US exit code), then 81, then the national number, leaving out any domestic trunk prefix (such as a leading 0).
Start calling Japan, not tomorrow.
Get a virtual Japan number or make direct international calls to +81 — active in under ten minutes.