Japan Country Code +81: How to Call Japan From Anywhere

Japan's country code is +81. That three-character prefix is the first thing you dial when you want a phone in Tokyo, Osaka, or a small island in Okinawa to ring. Get it right and the call connects on the first try. Get it wrong, or forget the small rule about the leading zero, and you end up listening to that polite recorded voice telling you the number cannot be completed as dialed.

I write a lot about international dialing for people who left home and still want to hear a familiar voice on the other end. Japan comes up constantly: parents calling a daughter studying in Kyoto, a startup founder in San Francisco closing a vendor contract with a factory in Nagoya, a traveler on hotel WiFi in Shibuya trying to confirm a dentist appointment back home. The mechanics are the same for all of them, and they are simpler than they look.

Here is everything you need to dial a Japanese number correctly, what the city prefix means when the number starts with 03 or 06, how the mobile prefixes work, and how to keep the call cost reasonable when your carrier would rather charge you a dollar a minute.

The short version

If you remember one line from this page, remember this one.

For most readers in the United States and Canada, the exit code is 011. From most of Europe, it is 00. From a mobile phone almost anywhere in the world, you can replace the exit code with a plus sign and dial +81 directly.

So a Tokyo office whose domestic number is written as 03-1234-5678 becomes +81 3 1234 5678 from abroad. A Japanese mobile written as 090-1234-5678 becomes +81 90 1234 5678. That dropped zero is the single most common mistake people make, and I will come back to it in the troubleshooting section because it causes more failed calls to Japan than anything else.

What +81 actually is

The +81 prefix is Japan's entry in the ITU's list of country codes, the international register that hands out every country code. The "+" is a convention your phone turns into whatever international access code is required by the network you are on. On a GSM mobile, holding down the 0 produces the plus. On a landline, you type the digits yourself.

Inside Japan, people never dial +81. They dial their domestic number with the leading 0, which is called the trunk prefix or trunk 0. That 0 is a routing instruction for the Japanese network. When your call arrives from abroad through +81, the international gateway has already done that routing work, so the 0 is not just unnecessary, it is wrong. Keep it in and the call fails.

The rest of the number after the trunk 0 is split into an area code and a subscriber number. The length of each piece depends on where in Japan the phone is. The biggest cities use short area codes, which means more digits are available for subscribers. Smaller towns use longer area codes with shorter subscriber numbers, but the total always comes out the same: ten digits including the trunk 0. The numbering plan is run by the Ministry of Internal Affairs and Communications, and the Wikipedia page on telephone numbers in Japan lists the full set of area codes.

Area codes for Japan's major cities

Japanese landline area codes always start with 0 inside the country. From abroad with +81 you drop that leading 0. Here are the ones you are most likely to need.

A Tokyo hotel reception line printed on a business card as 03-5678-9012 is +81 3 5678 9012 from your phone in Chicago or Berlin. A Kyoto ryokan printed as 075-123-4567 is +81 75 123 4567. Nothing else changes. One small trap: Sapporo's 011 looks exactly like the US exit code, so a Sapporo number dialed from a US landline reads 011 81 11 and then the local digits. That is correct, not a typo.

If you see a number written with hyphens or spaces, those are purely visual. Networks ignore them. You can type +81351234567 or +81 3 5123 4567 and the result is the same.

Mobile numbers in Japan

Japanese mobile phones use three-digit prefixes that always begin with 0 inside the country:

• 090 is the oldest and most widely used block.
• 080 was added as 090 filled up.
• 070 is the newest for mobiles. It originally belonged to PHS handsets and was opened to ordinary mobile numbers as demand kept growing.

All three behave identically for the caller. From abroad, you drop the leading 0 and dial +81 followed by 90, 80, or 70, and then the eight digits that follow.

A friend's mobile saved in your contacts as 080-1234-5678 should be stored as +81 80 1234 5678 if you ever want to reach them from outside Japan. A number saved in international format works whether you are in Japan or abroad, while the domestic form only works when your own phone is on a Japanese network. That is why I recommend saving every Japanese contact in international format from the start.

A couple of less common prefixes

You will occasionally see Japanese numbers that do not fit the pattern above. The most frequent ones are:

• 050 numbers are IP phones. These are internet-based lines used by businesses and some residential VoIP services. They are usually reachable from +81 the same way as any other number.
• 0120 and 0800 are toll-free numbers for use inside Japan. These will not connect from abroad. If you need to reach a Japanese company's support line from overseas, look for their international number on their website.
• 0570 is the Navi Dial shared-cost prefix used by many customer-service lines. Like toll-free numbers, these generally do not accept international calls.

Emergency numbers

If you are calling Japan to help a friend or family member, or if you are traveling in Japan yourself, the emergency numbers are:

• 110 for police. The National Police Agency runs English information for visitors.
• 119 for fire and ambulance.
• 118 for the Japan Coast Guard, which handles maritime emergencies.

These are dialed as three digits only inside Japan. From abroad they are not reachable, and that is intentional. Operators need to route to the right local dispatch, and the person on the scene is almost always better placed to call than someone overseas.

Time zones and when to call

Japan runs on Japan Standard Time (JST), which is UTC+9. There is no daylight saving time in Japan, and there has not been since 1951, so the offset from your home city changes only when your home city shifts into or out of its own summer schedule.

Rough reference points:

• From New York, Japan is 13 or 14 hours ahead depending on the US daylight saving cycle. 9:00 in the morning in Tokyo is 20:00 the previous evening in New York during US daylight time, 19:00 during standard time.
• From London, Japan is 8 or 9 hours ahead. 9:00 in Tokyo is midnight in London in winter and 1:00 in summer.
• From Sydney, Japan is 1 or 2 hours behind. The gap is small and shifts with Australia's summer time.

If you are calling a Japanese business line, the comfortable window is 10:00 to 17:00 local on weekdays. For personal calls, aim for the Japanese evening, which is roughly late morning or midday in Europe and very early morning on the US east coast. From the US, the easier overlap is your evening, which is the next morning in Japan. A small shortcut: searching "time in Tokyo" in any browser gives you the current local time instantly.

Keeping the call cost sensible

Here is where many people get surprised. Mobile carriers in the US and Europe often treat Japan as a premium destination. Without an international plan, US carriers commonly charge in the range of $1 to $3 per minute for calls to Japanese numbers, and even with a plan the per-minute charges add up quickly for anything longer than a short check-in.

At DG Labs we build Phonecall, a browser-based app that lets you call landlines and mobiles in 218 countries without installing anything on the other end. The Japan rate is $0.37/min to mobiles and $0.15/min to landlines, billed per second, with no connection fee and no subscription. You get 30 seconds of free call time on signup to test voice quality to a Japan number of your choice before you pay anything. Compared with a carrier charge of $1.50 a minute, a thirty-minute call to a Japanese mobile drops from roughly $45 to $11.10, or $4.50 if you are calling a landline. And because the billing is per second rather than per minute, a call that runs four minutes and ten seconds costs exactly that, not five full minutes.

Phonecall works from any laptop or phone browser on WiFi, mobile data, or an eSIM. There is no SIM to swap when you land in Narita and no app to install for the person you are calling. Their phone rings like a normal call because, from the Japanese network's perspective, it is one. That matters for people whose grandparents will not answer unknown apps but will always pick up a regular landline.

The three audiences I hear from most are migrants calling family in their origin country, people in Japan who need to call friends and businesses back home, and travelers passing through Tokyo or Kyoto who want to keep a line open to their life back home without paying hotel long-distance rates. If you are still planning the trip, the national tourism board's Japan.travel covers the rest.

Try a call to Japan with 30 seconds free

Troubleshooting a call to Japan that will not connect

Nine times out of ten, when a call to a Japanese number fails, one of these four things is why.

You kept the leading 0. The most common error. +81 03 1234 5678 does not route. You need +81 3 1234 5678. If you copied the number from a Japanese website, the 03 or 090 at the front is the trunk prefix. Drop that single 0 when you prepend +81.

You dialed the wrong exit code. From a US landline, 011 is the exit code. From the UK or most of Europe, it is 00. From a mobile anywhere, use + instead and let your network figure out the rest. If you typed 00 from a US landline, the call will not leave the country. In the Phonecall dialer you skip exit codes entirely and type the number in + form.

The number is a Japan-only toll-free or Navi Dial. 0120, 0800, and 0570 lines are blocked from international callers by design. Look for the organization's international number instead, which is usually labeled "from overseas" on their contact page.

A digit went missing. Rural Japan uses area codes up to five digits long, and the subscriber number is correspondingly shorter, but the dialing rule is the same: drop the leading 0 and keep every other digit. After +81, a landline always has nine digits and a 070, 080, or 090 mobile has ten. If you count fewer, a digit was lost in the paste.

If you have ruled out all four and the call still fails, test it the other way: ask the person in Japan to call you. If their outbound call to your +1 or +44 number also fails, the issue is on their line, not yours.

Calling Japan from nearby countries

The region around Japan is heavy with people who need to call in both directions. If you are reaching other Asia-Pacific numbers in the same session, the rules are the same but the country codes differ. South Korea is +82, China is +86, Taiwan is +886, the Philippines is +63, and Vietnam is +84. Each of them writes domestic numbers with a leading trunk 0, and the same rule applies: drop that 0 once the country code is in front.

Ready to try it?

Create a Phonecall account and your first 30 seconds of call time are on us. Type +81 and the Japanese number without the leading 0 into the dialer, and the voice on the other end picks up as if you were down the street.