Call Japan by dialing +81 or 011-81, dropping the Japanese leading 0, then entering the area or mobile number.
Most failed calls to Japan come from keeping the domestic 0, not from using the wrong country code. When you are working out how to call a Japanese number from the US, dial +81 from a mobile phone or 011-81 from a landline, then remove the first 0 from the Japanese number before the area code or mobile prefix.
A Japanese number written as 03-1234-5678 becomes +81-3-1234-5678 on a US mobile phone. A mobile number written as 090-1234-5678 becomes +81-90-1234-5678. The rule is simple once you spot the leading 0.
Calling Japan From The US: The Digits That Matter
Calling Japan from the United States needs three parts: the US international access code, Japan’s country code 81, and the Japanese number without its first 0. Mobile phones can replace the US access code 011 with the plus sign.
For a US mobile phone, the cleanest format is +81 followed by the Japanese number without the first 0. For a US landline, dial 011-81 followed by the same shortened Japanese number.
The Federal Communications Commission explains the general US international dialing order as 011, then the country code, then the area or city code and local number in its international calling tip sheet. For Japan, the country code in that sequence is 81.
Plain rule: If the Japanese number starts with 0, remove that first 0 after adding +81 or 011-81. Do not remove zeros that appear later in the number.
What Number Format Works For Japan?
Japanese landlines, mobiles, and business numbers all use the same international rule: add Japan’s country code and drop the domestic trunk 0. The examples below show what to dial from a US mobile phone and a US landline.
| Japanese Number You Have | Dial From A US Mobile | Dial From A US Landline |
|---|---|---|
| Tokyo landline: 03-1234-5678 | +81-3-1234-5678 | 011-81-3-1234-5678 |
| Osaka landline: 06-1234-5678 | +81-6-1234-5678 | 011-81-6-1234-5678 |
| Kyoto landline: 075-123-4567 | +81-75-123-4567 | 011-81-75-123-4567 |
| Yokohama landline: 045-123-4567 | +81-45-123-4567 | 011-81-45-123-4567 |
| Sapporo landline: 011-123-4567 | +81-11-123-4567 | 011-81-11-123-4567 |
| Japanese mobile: 090-1234-5678 | +81-90-1234-5678 | 011-81-90-1234-5678 |
| Japanese mobile: 080-1234-5678 | +81-80-1234-5678 | 011-81-80-1234-5678 |
| Japanese mobile: 070-1234-5678 | +81-70-1234-5678 | 011-81-70-1234-5678 |
Hyphens do not matter to the phone network; they only make the number easier to read. A number saved as +81312345678 works the same way as +81-3-1234-5678.
Landlines, Mobiles, And Toll-Free Numbers
Japanese landlines use city or regional area codes, while Japanese mobile numbers usually begin with 070, 080, or 090 inside Japan. In both cases, the first 0 is removed when dialing from the United States.
Tokyo’s domestic area code is 03, but callers from the United States dial it as 3 after Japan’s country code. Osaka’s 06 becomes 6, Kyoto’s 075 becomes 75, and a mobile prefix such as 090 becomes 90.
Japanese toll-free numbers, often starting with 0120 or 0800, are less predictable from abroad. Some accept international calls after the same leading-zero change, but many block overseas callers or require a normal geographic backup number.
- For hotels, restaurants, clinics, and rail offices, look for a number starting with a city code such as 03, 06, or 075.
- For a person in Japan, save the number in plus format so the phone works again if you travel outside the United States.
- For business calls, copy the number from the English-language contact page when one exists; many Japanese sites list an overseas-friendly number separately.
Costs, Time Zones, And Better Calling Windows
Calling Japan from a US carrier can cost more than a domestic call, and the exact rate depends on your phone plan. A Wi-Fi calling app or internet-based voice call may be cheaper when the other person can receive it.
Japan runs on Japan Standard Time, UTC+9, and does not use daylight saving time. That makes Japan 13 hours ahead of US Eastern time during US daylight saving time and 14 hours ahead during US standard time.
For practical calling, late afternoon in the continental United States often reaches Japan the next morning. A 6 pm call from New York during daylight saving time reaches Japan at 7 am the next day, while a 6 pm call from Los Angeles reaches Japan at 10 am the next day.
Polite timing: For hotels, restaurants, and offices in Japan, call during Japanese business hours and avoid lunch peaks when small businesses may be closed.
Why Won’t The Call Go Through?
Most failed Japan calls have one of five causes: the leading 0 stayed in, the US international prefix was missing, the number blocks overseas calls, the phone plan blocks international dialing, or the call was placed outside Japanese business hours. The fix depends on which part of the dialing chain failed.
| Problem | Likely Cause | Fix |
|---|---|---|
| Call fails right away | International dialing may be blocked on the US line | Ask the carrier to allow international calling |
| Recorded error after dialing | The Japanese leading 0 was kept | Change 03 to 3, 090 to 90, or 080 to 80 |
| Landline call does nothing | The 011 exit code may be missing | Dial 011-81 before the shortened Japanese number |
| Mobile call fails | The plus sign may not have been entered | Hold 0 until + appears, then dial +81 |
| Toll-free number fails | Japanese toll-free numbers may reject overseas calls | Find a regular landline or international contact number |
| No one answers | Japan may be outside business hours | Call during the next Japanese morning or afternoon |
| Number looks too short | Some area codes vary in length | Do not add digits; confirm the full number from the source |
Do not add a 1 before Japan’s country code. The 1 prefix is for North American Numbering Plan calls, not for Japan.
Dial The Right Version
The safest way to call Japan is to convert the number before you dial, then save it in international format for next time. That avoids switching between US landline rules and mobile phone rules.
- Find the Japanese number exactly as written, such as 03-1234-5678 or 090-1234-5678.
- Remove only the first 0, giving 3-1234-5678 or 90-1234-5678.
- Add +81 on a mobile phone, or add 011-81 from a US landline.
- Dial the full number and wait longer than you would for a domestic call.
- Save the contact in plus format, such as +81-3-1234-5678.
For a Tokyo hotel, dial +81-3 before the local number from a US mobile phone. For a Japanese mobile number, dial +81-90, +81-80, or +81-70 before the final eight digits. For a US landline, replace the plus sign with 011 every time.
References & Sources
- Federal Communications Commission.“International Long Distance Calling Made Simple Tip Sheet.”Supports the US international dialing order of 011, country code, area or city code, and local number.