How to Get a Japanese Phone Number
A practical guide for foreign residents who need a Japanese mobile number for calls, SMS verification, work, housing, deliveries, and everyday life.
If you need a normal Japanese mobile number for calls and SMS, choose a voice-capable plan that explicitly includes a Japanese phone number. A data-only travel SIM or eSIM is not enough. Check your exact phone model, current identity-verification requirements, payment method, total cost, and activation process before applying.
Start with the right requirement: voice and SMS, not just data
The first decision is whether you need a normal Japanese mobile number or only internet access. Many short-term travel SIMs and eSIMs are data-only. They can run maps and messaging apps, but they do not provide ordinary carrier voice calls and SMS in the same way as a voice plan.
If you expect to receive SMS verification, take ordinary domestic calls, or give a local contact number to an employer, school, delivery company, clinic, landlord, guarantor company, bank, or other service, choose a plan that explicitly includes voice and SMS. Individual organizations decide which numbers and verification methods they accept, so a Japanese number should not be treated as a guarantee of eligibility for any particular service.
- Voice + data: usually the simplest choice when you want one main Japanese line for calls, SMS, and mobile internet.
- Voice-focused plan: useful if you mainly need a Japanese number and use another connection for most data.
- Data-only SIM/eSIM: suitable for internet access but not a substitute for a normal voice-and-SMS line.
- Home-country roaming: can preserve your overseas number but may not solve services that expect a Japanese contact number.
What a normal Japanese mobile number looks like
Standard Japanese mobile numbers commonly use the 070, 080, or 090 prefixes. When the number is written for domestic use, the leading zero remains. In international format, Japan's +81 country code replaces that leading zero.
For example, a domestic number written as 090-1234-5678 becomes +81-90-1234-5678 in international format. Follow the format requested by the website, form, or person you are contacting instead of entering both versions.
- Domestic format: keep the leading 0.
- International format: use +81 and remove the leading 0.
- An app-based or virtual number should not automatically be assumed to work anywhere a standard mobile number is requested.
Compare provider types before you choose
Japan has major carriers, lower-cost online brands, MVNOs, and services built around the needs of international residents. The best fit depends on your length of stay, data use, language needs, device, payment method, and how much help you want during setup.
Two English-oriented services currently worth comparing for residents are Sakura Mobile and Mobal. Sakura Mobile's current Monthly Voice + Data SIM/eSIM provides a normal Japanese 070, 080, or 090 number with voice, SMS, and data. Mobal also offers voice products with standard Japanese mobile numbers, including Voice + Data and voice-focused options. Neither should be treated as automatically best for everyone: compare the current total cost, data allowance, call and SMS charges, device compatibility, support, pickup or delivery method, and cancellation or reissue rules.
- Major carriers: useful when a large shop network, handset purchase, or broad domestic service ecosystem matters.
- Online and low-cost brands: can be attractive when price matters and you are comfortable with self-service setup.
- International-resident-focused services: can reduce language and onboarding friction, but compare the full cost and conditions rather than choosing on convenience alone.
- Always check the provider's current official product page immediately before applying because plan details can change.
Prepare for identity verification under the current rules
Voice mobile service in Japan involves identity verification, and the accepted documents and verification method depend on the provider, nationality, application channel, and receiving method. Do not use one carrier's document list as a universal rule for every provider.
Online identity-verification procedures changed in 2026 following amendments affecting mobile-phone contracts. Rakuten Mobile, for example, states that its online verification methods changed from April 1, 2026 and publishes specific procedures for foreign nationals. Current address, name, date of birth, document validity, and the verification method can all matter.
Sakura Mobile currently states that a residence card or My Number Card with a registered Japanese address can support its resident application flow, while a passport route for Voice + Data requires face-to-face identity verification and pickup at an eligible location. Check the current instructions for the exact product you choose.
- Use an unexpired document accepted by the provider.
- Make sure your application name, date of birth, and address match the required document format.
- Update an outdated residence-card address before applying when the provider requires a current registered address.
- Use only the provider's official website, official app, or authorized counter when submitting identity information.
- Keep access to the email account used for the application because verification and activation instructions may be sent there.
Step by step: from choosing a plan to getting your number
The exact screens differ by provider, but the safest sequence is consistent: define the functions you need, check the phone, prepare matching identity information, apply through an official channel, complete verification, then activate and test the line.
Do not pay first and investigate compatibility later. A plan that looks inexpensive is useless if your regional phone model does not support the required network, VoLTE, eSIM system, or carrier settings.
- Decide whether you need voice calls, SMS, mobile data, or all three.
- Confirm that the exact phone model is unlocked and compatible with the provider.
- Choose a voice-capable SIM or eSIM plan that explicitly includes a Japanese phone number.
- Prepare the provider's current accepted ID, email address, address information, and payment method.
- Apply through the official website, app, or authorized shop or counter.
- Complete identity verification and the required delivery, pickup, or digital-receipt process.
Physical SIM or eSIM: choose by device and reissue rules
Physical SIM and eSIM can both support a real Japanese phone number when the underlying plan includes voice and SMS. The better format depends on your phone and how often you change devices.
A physical SIM is easy to understand and can be simpler when moving between compatible phones. An eSIM avoids a plastic card and can be convenient for dual-SIM use, but moving or reinstalling it may require a provider-specific reissue process.
Sakura Mobile currently says that moving or reinstalling its monthly eSIM requires reissuance, and Voice + Data eSIM reissuance requires another identity check. That is why eSIM convenience should be weighed against the provider's transfer and reissue rules.
- Check whether the phone is carrier-unlocked.
- Check the exact model number and regional version, not only the marketing name.
- Confirm supported network bands and VoLTE for ordinary calls.
- Confirm eSIM support and available eSIM profile capacity if you choose eSIM.
- Before deleting an active eSIM, confirm how reinstallation works and whether a fee or another identity check applies.
Can you arrange a Japanese number before arriving?
Some resident-focused services allow you to begin the application before you arrive in Japan, but that does not mean every identity-verification and activation step can be completed overseas.
Sakura Mobile currently allows Voice + Data applications from outside Japan, but the receiving process depends on the identity document. Its passport route requires in-person identity confirmation at an eligible pickup point. Mobal's voice eSIM information also explains that identity verification is required and that its eSIM access method is not the same as instant email delivery for a data-only travel eSIM.
If you need a working local number soon after arrival, verify the pickup location, opening hours, original ID required, activation timing, and phone compatibility before you travel.
- Do not confuse a pre-arrival data-only travel eSIM with a resident voice plan.
- Confirm when the Japanese number is actually assigned.
- Confirm whether pickup or identity verification must happen in Japan.
- Bring the original documents required for the receiving method you selected.
Compare the full cost and exit conditions
The monthly headline price is only one part of the decision. Registration fees, call and SMS charges, data limits, eSIM or SIM reissue fees, cancellation rules, optional services, and device costs can change the real cost over the time you expect to use the line.
Promotions and plan prices change, so use the current provider fee page rather than an old screenshot or blog price. If a provider offers several voice products, compare the one that matches your actual data use instead of choosing the lowest advertised figure.
- Initial registration or activation fee.
- Monthly fee and included data.
- Outgoing call and SMS charges.
- SIM/eSIM replacement or reissue fees.
- Cancellation, minimum-use, or irregular-termination conditions.
- Payment methods and whether your card or bank method is accepted.
Activate the line and test every function
Signal bars alone do not prove that the line is fully usable. Follow the provider's setup instructions and test voice, SMS, and data separately before depending on the number for important accounts.
If mobile data fails, check the provider's APN or carrier-profile instructions. If you use dual SIM, confirm which line handles mobile data, calls, and SMS so you do not accidentally use expensive roaming on the overseas line.
- Make an outgoing domestic call and receive an incoming call.
- Send an SMS and receive an SMS.
- Turn Wi-Fi off and test mobile data.
- Check tethering if you plan to use it.
- Save the number in both domestic and +81 formats.
- Save the provider's official support contact and protect the account login.
Keep the number secure and plan for future changes
A phone number can become part of your login, password-recovery, banking, delivery, and identity-verification chain. Treat the SIM, eSIM profile, provider account, and SMS codes as sensitive credentials.
If you change providers, check the current Mobile Number Portability rules before cancelling the existing service. Processes vary by provider and product. If the phone or SIM is lost, contact the provider through its official support channel quickly and secure important accounts that rely on the number.
- Never give an SMS verification code to an unknown caller or message sender.
- Do not let another person register or control a phone line in your name.
- Do not share an eSIM activation QR code or access code.
- Update the provider when required after a legal-name, address, payment-method, or residence-document change.
- Check number-portability and final-billing rules before switching or leaving Japan permanently.
Decision checklist before you apply
Use this final checklist before paying. If an answer is unclear, verify it on the provider's current official page or ask official support. The right plan is the one that reliably provides the functions you need at a total cost and support level you accept.
- Does the plan explicitly include a normal Japanese phone number, voice calls, and SMS?
- Is my exact phone model unlocked and compatible?
- Can I complete the required identity verification with my current documents?
- Does the provider accept my payment method?
- What is the total first-month cost and the normal ongoing cost?
- What happens if I change phones, delete the eSIM, switch providers, or cancel?
FAQ
Do all Japanese eSIMs include a phone number?
No. Many travel eSIMs are data-only. If you need ordinary calls and SMS, choose a voice-capable plan that explicitly includes a Japanese mobile number.
Can I use an overseas phone with a Japanese SIM or eSIM?
Often yes, but the exact device must be unlocked and compatible with the provider's network, VoLTE, SIM type, and eSIM implementation. Check the model and regional version before ordering.
Do foreign residents always need a residence card?
Not in every provider and application route. Requirements vary. For example, some resident flows use a residence card or My Number Card, while some passport routes require in-person identity verification. Follow the current document list for the provider and product you choose.
Can I get a Japanese phone number before arriving in Japan?
You may be able to start or complete parts of the application before arrival, but pickup or identity verification can still be required in Japan. Check the provider's current receiving and activation rules before travel.
Can I receive SMS verification with a data-only SIM?
A true data-only plan does not provide ordinary carrier SMS through a normal Japanese mobile number. Internet messaging apps are different from standard SMS verification.
Can I keep my Japanese number if I change providers?
Mobile Number Portability may allow an eligible number to move to another provider, but the process and product eligibility vary. Confirm the current rules before cancelling the existing line.
Official References
Final Thoughts
Getting a Japanese phone number is much easier when you choose by function first: ordinary voice and SMS, device compatibility, identity-verification method, payment, total cost, and support. Compare current official conditions before paying, protect your account and verification codes, and test calls, SMS, and data before relying on the number for work, housing, deliveries, banking, appointments, or account recovery.