How to Call Japan: Your First Five Minutes

To call Japan from the United States, dial +81 on a mobile phone (or 011 81 on a U.S. line that requires an exit code), remove the initial 0 from the Japanese domestic number, then dial every remaining digit. Tokyo 03-XXXX-XXXX becomes +81 3 XXXX XXXX, and mobile 090-XXXX-XXXX becomes +81 90 XXXX XXXX. The plus sign replaces the caller-country international access code; 011 is never part of the Japanese number.

The International Telecommunication Union's current National Numbering Plans list assigns Japan +81. Japan's Ministry of Internal Affairs and Communications (MIC) defines 0 as the domestic prefix. Those two facts settle the digits people most often get wrong.

The rest is a short setup job: preserve the number you were given, make one deliberate deletion, choose the route that reaches the kind of contact you have, and check the price before a long conversation begins.

What should you do before touching the call button?

Start with the number exactly as the hotel, relative, or business supplied it. Screenshot it or write it on one line. Build the international version on a second line. The first cup has not done its work for me yet, so I am using the same rule I used around factory equipment: copy first, edit second. A bench scale and a label printer only found each other when every address survived the setup; telephone digits are equally indifferent to good intentions.

Then convert the number in this order:

1. Copy the full Japanese domestic number, including its opening 0.
2. Choose + on a mobile or your calling service's international exit code. For a conventional U.S. international call, that code is 011.
3. Put Japan's country code, 81, next. Remove the single domestic 0 at the front of the Japanese number and leave every later zero alone.
4. Dial, confirm that the right person or organization answered, and save the working contact in +81 format.

This process preserves the subscriber digits. It also gives you the practical E.164-style presentation used in contact books: +81 3 XXXX XXXX remains intelligible to a smartphone whether you are in Chicago, an airport in Europe, or Japan itself. Your carrier and plan still determine whether the call is allowed and what it costs.

Is 011 part of a Japanese phone number?

No. 011 is the international exit code used for calls originating through services in the North American Numbering Plan; it is not part of Japan's number. AT&T's international dialing instructions tell U.S. wireless customers to press + or 011, followed by the country code and local number. The choice occupies the same position in the dialing sequence.

That distinction explains the conflicting examples online. A U.S.-centric instruction may show 011 81 3 XXXX XXXX. A portable contact shows +81 3 XXXX XXXX. Do not combine them as +011 81..., and do not save 011 in a Japanese contact.

Outside the United States, check the originating carrier's dialing instructions because the exit code can change with the country and service. On a mobile keypad, I prefer +. It expresses the job directly, leaving the phone and carrier to supply the applicable international access method. If a hotel desk gives you only an 011 example, retain everything beginning with 81 and replace 011 with +.

Which zero must disappear after +81?

Remove only the first 0 from a Japanese number written for domestic use. MIC's Telecommunications Numbering Plan defines 0 as Japan's domestic prefix and states that country code 81 can take its place for calls arriving from outside Japan. This is why +81 03... is wrong while +81 3... is right.

The zero is easy to mistake for part of the area or mobile prefix because Japanese numbers are routinely printed with it: 03 for Tokyo and 070, 080, or 090 for current mobile ranges. In international form those become 3, 70, 80, or 90 after +81.

Stop after that one deletion. A subscriber number may contain other zeros, and they stay. For example, an illustrative 090-1200-3400 converts to +81 90 1200 3400. Removing every zero would destroy five valid digits. This is where a slow, mechanical conversion beats guessing from the shape of the number.

How do Japanese landline and mobile formats differ?

A Japanese geographic landline begins domestically with 0 plus an area code, while a current mobile number begins with 070, 080, or 090. MIC's March 1, 2026 area-code list assigns Tokyo's 23 wards the one-digit area code 3, printed domestically as 03. The same list contains longer area codes elsewhere, so spacing alone cannot identify the boundary.

| Number received in Japan | What it is | International form | |---|---|---| | 03-XXXX-XXXX | Tokyo geographic landline | +81 3 XXXX XXXX | | 070-XXXX-XXXX | Mobile | +81 70 XXXX XXXX | | 080-XXXX-XXXX | Mobile | +81 80 XXXX XXXX | | 090-XXXX-XXXX | Mobile | +81 90 XXXX XXXX |

MIC says the 070, 080, and 090 mobile numbers have 11 digits domestically. Geographic numbers such as Tokyo's have 10 digits domestically, yet geographic area codes vary in length. A ten- or eleven-digit appearance is therefore a useful check, never permission to invent a split.

There is a current wrinkle. MIC authorized a future 060 mobile range, but its July 8, 2026 update says operators postponed the planned launch and that existing voice-mobile ranges remain 070, 080, and 090. If someone eventually gives you a live 060 mobile number, verify the range against MIC and the relevant carrier before relying on an old guide.

How do you call Japan from an iPhone?

Open the Phone app, tap Keypad, then press and hold 0 until + appears. Apple documents that gesture in the iPhone User Guide as the way to enter “+” for international calls. Type 81, add the Japanese number without its initial domestic 0, and tap Call.

For a Tokyo example, enter +81 3 XXXX XXXX. For a Japanese mobile printed as 090-XXXX-XXXX, enter +81 90 XXXX XXXX. If your iPhone has Dual SIM, check the selected line before calling; Apple places the line selector at the top of the keypad on supported models. The line matters because each carrier plan can price Japan differently.

Save the contact in +81 form after the connection works. On Android, enter or paste the same +81 form into the dialer; use the handset maker's documented keypad method if the plus sign is hidden. Do not substitute 011 merely because one U.S. example used it.

How should you call a Japanese hotel or business?

Take the number from the hotel's official website, booking confirmation, or direct message. If it is displayed as 03-XXXX-XXXX, call +81 3 XXXX XXXX from a U.S. smartphone or 011 81 3 XXXX XXXX through a U.S. service that instructs you to use 011. Say the guest name and reservation date early; that gives the desk two concrete ways to find the booking.

Some organizations publish a domestic toll-free number or a short service code. International completion for those numbers is not guaranteed. Ask for a geographic or internationally reachable alternate number before travel, especially when the call concerns a late arrival, accessibility arrangement, or a child traveling separately.

I would keep that alternate in the same contact record and test it before it becomes urgent. On the shop floor, the useful connection was the one that had actually moved a label or weight reading, not the tidy configuration on paper. Here, a brief answered call provides the evidence.

What will a call to Japan cost?

The digits do not reveal the price. Your originating service, plan, destination type, and current location do. The spread can be severe: AT&T's international rate table, checked in September 2026, lists Japan at $4.00 per minute pay-per-use and $0.00 per minute with its $15-per-month International Calling package. Taxes, roaming, and plan conditions can sit outside that headline rate.

Google Voice's current calling-rate table gives a sharper VoIP comparison. It lists Japan landlines at $0.02 per minute, Japanese mobiles at $0.04 per minute, and numbers classified as Japan VoIP at $0.03 per minute. These are rates for Google Voice calls placed to telephone numbers, subject to Google's terms and rate changes.

| Calling route | Reaches an ordinary Japanese number? | Published price checked September 2026 | Main catch | |---|---:|---:|---| | AT&T pay-per-use | Yes | $4.00/min to Japan | A ten-minute call is $40 before any separate charges | | AT&T International Calling package | Yes | $0.00/min to Japan, plus $15/month | Requires an eligible plan and add-on | | Google Voice | Yes, for supported destinations | $0.02 landline; $0.04 mobile; $0.03 Japan VoIP | Credit, account eligibility, and current rates apply | | WhatsApp voice call | Only another WhatsApp user | $0 calling fee; data charges may apply | It does not ring an ordinary hotel switchboard merely because you know its phone number |

Check the price page while signed in when possible. AT&T also warns that Wi-Fi Calling to a number outside the United States is billed as international long distance. Wi-Fi can carry the audio without turning a carrier-routed international call into a free call. Roaming adds another layer when the U.S. phone itself is abroad.

Is WhatsApp a free replacement for calling a Japanese number?

WhatsApp is a good free route when both people use WhatsApp and have internet access. WhatsApp's calling page says voice and video calls have no calling fee or time limit, while data charges may apply. Its voice calls use the phone's internet connection rather than mobile-plan minutes.

That solves an app-to-app problem. A PSTN call solves a reachability problem: it rings a normal landline or mobile number through the telephone network. A relative who uses WhatsApp may be easiest to reach in the app. A hotel reception number, clinic switchboard, or business landline usually needs a carrier or a VoIP service that explicitly supports calls to Japanese telephone numbers.

Before choosing the free route, confirm that the intended recipient has the app, the correct account is in your contacts, and someone monitors it. For a time-sensitive hotel call, I prefer the published telephone number plus a tested low-cost calling service. “Free” has little value when it reaches nobody.

How can you test the setup before the call matters?

Make a short, non-urgent call during the recipient's stated business hours. Confirm the spoken organization or the person's identity before discussing a reservation or family matter. If the call fails, return to the written source and inspect only four points: + versus exit code, country code 81, the removed leading 0, and the remaining digits.

A fast busy tone or recorded message does not prove the format is wrong. The line may be occupied, closed, restricted from international calls, or unsupported by the chosen app. Try the organization's published alternate, then ask your carrier whether international dialing is enabled. I have not tested every U.S. plan, and carrier-level blocks cannot be diagnosed from the number's appearance.

Once a call connects, save the +81 version beside the service and rate you used. For the next call, the contact record answers two questions: which digits worked and which account will be billed.

Frequently asked questions

How do I dial a +81 number?

Enter +81, omit the Japanese domestic number's first 0, and dial all remaining digits. For example, Tokyo 03-XXXX-XXXX becomes +81 3 XXXX XXXX; mobile 090-XXXX-XXXX becomes +81 90 XXXX XXXX. On a U.S. service requiring an exit code, use 011 81 instead of +81.

Is there a way to call Japan for free?

WhatsApp voice calls carry no calling fee when both parties use WhatsApp, though internet data charges may apply. Some carrier packages also list $0-per-minute calls after a monthly fee. To ring an ordinary Japanese landline or mobile, use a service that supports telephone-number calling and verify its current rate first.

Do you still need to dial 011 for international calls?

Use 011 when your U.S. calling service specifically requires the North American international exit code. On a smartphone, + is the more portable choice: +81 followed by the Japanese number without its leading 0. Never enter both + and 011, and never store 011 as part of the Japanese contact.

Which country code is +81?

+81 is Japan's country calling code. The International Telecommunication Union lists Japan under +81 in its National Numbering Plans. When converting a Japanese domestic number, place +81 first and remove the domestic trunk prefix 0, so Tokyo's 03 becomes 3 and mobile prefix 090 becomes 90.

How do I call Japan from an iPhone?

Open Phone, tap Keypad, and hold 0 until + appears. Enter 81, then the Japanese number without its first domestic 0, and call. Apple documents the long-press gesture for international calls. On a Dual SIM iPhone, select the intended line first because its carrier plan determines the charge.

How do I call a Japan hotel from the US?

Use the hotel's official number. On a U.S. smartphone, enter +81 and remove the number's opening 0; Tokyo 03-XXXX-XXXX becomes +81 3 XXXX XXXX. A U.S. line requiring an exit code uses 011 81 3 XXXX XXXX. Check the rate and request a geographic alternate to domestic toll-free numbers.