On 29 May 2026, Japan promulgated an amendment that extends identity verification at the time of a mobile contract (checking who the applicant is) from voice services to communications other than voice, which may bring data SIMs into scope. Promulgation does not mean everything is in force. Apart from some provisions, the effective date is set by a cabinet order, within one year of promulgation, and the Ministry of Internal Affairs and Communications (MIC) materials of July 2026 still leave the types of SIM covered and the cap on the number of lines to a ministerial ordinance. This Japan phone number guide explains what visitors buying a data SIM and residents getting a phone number need to prepare today.
The short answer: if you only need internet access, buy a data SIM or eSIM on the terms shown on the seller’s page, and check the latest rules once more before you leave. If you need a Japanese number to receive SMS, choose a plan that includes voice and SMS and bring your passport. If you are settling in Japan, have your residence card and passport ready, and before applying online confirm that the address stored in the card’s IC chip is up to date.
This guide answers:
- How do visitor data SIMs and eSIMs differ, and which ones have no phone number or SMS?
- What should you bring to get a phone number as a resident, and what if the address on your residence card differs from the IC chip?
- Which cards can receive verification codes for banks, government services, ride-hailing and food delivery?
- How do you keep a number when you leave Japan, and what does cancelling cost?
Key Points
- Who this is for: Visitors and people staying in Japan, including those whose home network is in Hong Kong, Taiwan, mainland China, Singapore or Malaysia, as well as overseas owners and tenants of Japanese property who need a Japanese number.
- Promulgation is not full effect: The law promulgated on 29 May 2026 widens identity verification. Which SIMs it covers, when it takes effect and the detailed rules depend on a cabinet order and a ministerial ordinance. The conditions for buying a data SIM are those published by the seller at the time of purchase.
- Some data cards have no SMS: povo Japan SIM and IIJ Japan Travel SIM Unlimited do not support voice or SMS, so they cannot receive SMS verification codes.
- Documents for residents: Docomo, au and SoftBank list a residence card plus a foreign passport; Docomo and SoftBank do not require the foreign passport from permanent residents.
- Online applications depend on the IC chip: Rakuten and au both warn that an address not updated in the chip affects online applications.
- Keeping a number is not the same as receiving codes: SMS cannot be received during au’s temporary suspension, and SoftBank Simple Style cannot be used overseas.
Which Situation Are You In?
Your route depends on whether you are a short-term visitor or a resident, and on whether you need a Japanese number.
| Your situation | Route | What to prepare |
|---|---|---|
| Short-term visitor who only needs internet | Data-only SIM or eSIM | A compatible phone; purchase conditions are on the seller’s page |
| Short-term visitor who needs a Japanese number for SMS or calls | A visitor plan with voice and SMS | Passport; document requirements differ by collection method |
| Short-term visitor who needs to receive SMS on the home number | Roaming on the home number | Confirm roaming and phone settings with the home carrier before you leave |
| Resident | Prepaid voice or monthly-contract number | Residence card, foreign passport, and for some carriers a credit card in your own name |
Plan Comparison
The plans differ mainly in whether they include voice and SMS, how long they last and how they are priced.
Prices are those listed on the providers’ pages when checked in October 2026. Plans and stock change.
| Plan | Type | Voice and SMS | Price | Validity | Where to buy |
|---|---|---|---|---|---|
| povo Japan SIM | Data-only eSIM | None | 3GB ¥600, 5GB ¥900, 10GB ¥1,430, 20GB ¥2,700 (tax included; online plans announced 19 March 2026) | 3, 5, 7 and 30 days | Online; the lineup at Lawson stores differs |
| IIJ Japan Travel SIM 3GB to 55GB | Physical SIM, eSIM | Check the packaging and terms before buying | Open pricing, set by the retailer | 30 days | Retailers |
| IIJ Japan Travel SIM Unlimited | Physical SIM | None | Check with each seller | 10, 15 and 31 days | Sellers |
| SoftBank Prepaid SIM for Travel | Prepaid SIM for visitors to Japan | Officially listed as data communication only | Open pricing | Check the terms before buying | Retailers |
| Mobal 7GB voice and SMS plan | SIM/eSIM with voice, SMS and data | Yes | ¥4,950 to buy the card plus ¥4,950 at activation, ¥9,900 in total | 30 days | Mobal website |
| SoftBank Simple Style | Prepaid voice | Yes | Top-up cards of ¥3,000 or ¥5,000 | 60 days per card | Requires a residence card or similar; see the residents section |
Three points when comparing:
- Open pricing: The provider does not set a uniform price, so the same card can cost different amounts in different shops. IIJ’s February 2025 announcement priced a 3GB, 30-day eSIM at ¥2,480 (tax-free). That was the announced price at the time, so confirm 2026 shop prices on the spot.
- Mobal means two payments: The ¥4,950 is split into a purchase payment and an activation payment. Call and SMS charges are covered separately in the plan’s terms.
- Beware old information: Docomo’s Japan Welcome SIM & Wi-Fi ended service on 30 September 2019, and the 500MB top-up for SoftBank Prepaid SIM for Travel stopped being accepted on 18 February 2025. Old prices still left on web pages should not be treated as current.
What Visitors Should Do
Visitors who only need internet can buy a data SIM or eSIM, and those who need a number should choose a plan with voice and SMS.
Data Only: Buy an eSIM Before You Leave, or a Physical Card at the Airport
Either works, but if you buy an eSIM before departure, check how the validity period starts. povo Japan SIM’s online plans take effect immediately on purchase, so buying too early starts the day count early. IIJ’s eSIM, per its 2025 announcement, starts counting from the first day of communication.
IIJ Japan Travel SIM 3GB to 55GB lets you add data during the usage period with an IIJmio prepaid card or a digital prepaid card. Whether adding data extends the validity differs between old and new products, so go by the packaging and terms of the card in your hand.
Narita and Haneda airports both have SIM vending machines:
- Narita Airport: A GPA SIM vending machine is located before security on the 1st floor of Terminal 1’s North Wing. The airport website notes that the relevant sales points are in the area before departure procedures.
- Haneda Airport: Terminal 1 has a vending machine for domestic prepaid SIMs. The airport website lists 05:00 to 24:00, subject to the terminal’s opening hours, while AnyFone’s page lists the machine on the Terminal 1 basement level as 24 hours. If you arrive late at night or very early in the morning, Zagdim recommends buying before you leave.
Do Data SIMs Require ID Now?
Not yet for data-only SIMs. Under the current provisions in Japan’s statute database, the legal identity check applies when someone signs a mobile voice contract (confirming name, address and date of birth). Data-only SIMs are not yet covered by that legal duty. The amendment has been promulgated to extend the scope to communications other than voice, but the effective date is set by a cabinet order and which SIMs are covered is set by a ministerial ordinance of the MIC. As of 30 October 2026, we found no effective date set by a cabinet order in the public sources reviewed. A provider’s own purchase conditions are a separate matter, and the seller’s page governs.
The amendment also contains a provision for foreigners who have no address in Japan, allowing a substitute address to be checked. Which items a visitor must provide depends on the detailed rules that follow.
MIC’s July 2026 materials set out before-and-after comparisons: for data SIMs used by foreigners on short stays, no identity check applies now, and after the amendment an identity check using the passport alone becomes possible. This is the post-amendment arrangement, which is not yet in force, and which SIMs apply is still waiting for the ministerial ordinance.
Zagdim recommends reading the conditions on the seller’s page before buying and carrying your passport. If your trip falls after the amendment takes effect, check again before you leave.
If You Want a Japanese Number: Prepare Documents for Your Collection Method
Prepare the documents that your collection method requires. When a Mobal voice SIM/eSIM is collected at a designated pickup point, Mobal requires you to show your passport and order confirmation to the staff on arrival; delivery by post has its own document requirements. Zagdim recommends confirming what your chosen method needs before ordering. A passport being accepted for pickup does not mean every delivery method needs only a passport.
What Residents Should Do
Residents need a residence card and, at most carriers, a foreign passport, and should check that the address in the card’s IC chip is current.
Which Documents Are Needed to Get a Number?
Docomo, au and SoftBank list a residence card plus a foreign passport. The residence card (zairyu card) is the card Japan issues to foreign nationals on medium- to long-term stays. The table below excerpts the documents each provider lists for foreign applicants. Confirm any additional documents and payment conditions for your application method.
| Provider | Documents | Notes |
|---|---|---|
| Docomo | Residence card plus foreign passport | Holders of permanent residence status may skip the foreign passport; confirm other additional documents and payment conditions for your application method |
| au | Residence card or second-generation residence card, plus foreign passport | If the remaining period of stay is under 90 days, only a credit card in your own name is accepted for the monthly fee |
| SoftBank (online) | Residence card plus foreign passport | General permanent residents may skip the foreign passport; applicants with “no status” (資格なし) are not accepted |
| SoftBank Simple Style (prepaid voice) | Residence card plus foreign passport | General permanent residents may skip the foreign passport; up to 2 lines per person |
| Rakuten Mobile | Residence card with photo, or Special Permanent Resident certificate | Name, address and date of birth must match the application |
| IIJmio (online) | Accepted documents include the residence card and the Special Permanent Resident certificate | Requires a credit card in your own name and a smartphone that can read an IC chip |
Giving false personal information in an application is prohibited. If you do not cooperate with the identity check, the provider may refuse to provide service until you do.
What If Your Residence Card Address Differs from the IC Chip?
Update the chip before applying online. On 15 May 2026, Rakuten Mobile warned foreign applicants that if the IC chip does not hold the correct address, the “easy identity check by smartphone” (スマホでかんたん本人確認) cannot be used and the application must be made at a store.
The au online store also does not accept contracts where the address on the document differs from the current address, and requires you to update the name and address stored in the IC chip first. These are rules for particular online procedures at these two carriers. How other carriers and their stores handle it must be confirmed with each provider.
What If You Have the New-Format Residence Card?
IIJmio announced that it began accepting the new-format residence card and related documents issued from 14 June 2026 as of 16 June 2026. Other carriers have their own acceptance dates, so if you hold a new card, ask before applying.
Do Online and In-Store Identity Checks Change at the Same Time?
The dates differ. MIC’s September 2025 report lists online methods as taking effect on 1 April 2026 and in-store methods as planned for April 2027. Rakuten Mobile has announced that it changed the identity verification method for website applications because of the amendment taking effect on 1 April 2026.
The in-store part is still a plan, and online procedures described in older articles may be out of date. When you apply, go by the provider’s current screens and the store’s explanation.
Prepaid or Monthly Contract?
Prepaid voice is topped up by card, while a monthly contract such as IIJmio’s requires a residence card and a credit card.
- Prepaid voice (SoftBank Simple Style): You top up with a card, or by credit card on a computer web page. Each registered ¥3,000 or ¥5,000 top-up card gives a 60-day usage period, followed by a separate 360-day number validity period.
- Monthly contract: IIJmio’s page for foreigners lists a residence card and a credit card as required to apply for monthly plans.
Zagdim recommends asking before you sign if you plan to start prepaid and later switch to a postpaid plan while keeping the number. SoftBank Simple Style cannot be switched directly to SoftBank postpaid with the same number; transferring out by MNP (mobile number portability, moving your number between carriers) follows separate conditions. Docomo’s guidance also excludes data-only service from the number portability procedure.
How Many Lines Can One Person Have?
Limits differ by provider and cannot be added up as a nationwide rule:
- au: In principle 5 lines per individual name; the actual number may vary with the application.
- SoftBank: 5 mobile lines per name, of which Simple Style is limited to 2.
- Rakuten Mobile: A total of up to 10 lines across the Rakuten Saikyo plan, data plans and Saikyo U-NEXT, still subject to screening conditions.
The amendment allows providers to refuse service for lines beyond a certain number. MIC’s July 2026 materials leave the specific number to a ministerial ordinance and use the major carriers’ practice of 5 voice SIMs in principle as the basis for discussion.
Receiving Verification Codes: Which Services Need a Japanese Number?
Services that send codes by SMS need a number that can receive SMS, so a data card without SMS, such as povo Japan SIM, will not help. How each service works is below, and applies only to the functions listed:
| Service | Verification method | What it means for you |
|---|---|---|
| Mizuho Bank, Mizuho Direct | SMS authentication requires a Japanese mobile number starting with 020, 070, 080 or 090 | If you cannot use such a number, you cannot use this SMS authentication |
| Japan Post Bank, Yucho Authentication App | SMS if a mobile number is registered on the account; for other numbers, an automated voice call gives the code | Before registering, check which phone number the account holds |
| Mynaportal (login with an IC card reader) | My Number card and 4-digit password | This step does not rely on SMS to a phone |
| GO (ride-hailing) | Enter a mobile number that can receive SMS and the 4-digit code | The official page warns that overseas numbers may not receive it |
| Uber Eats | Mobile number entered when registering or changing the phone | The code may not arrive if overseas SMS is blocked; the page does not say a Japanese number is always required |
| Demae-can (food delivery) | After you enter a mobile number, the system calls and verifies by voice | You must be able to take a call; a card that only receives SMS may not be enough |
Having a Japanese number does not mean you can open a Japanese bank account. Whether a bank will accept a given visitor voice card has to be confirmed with that bank.
Roaming on Your Home Number
Roaming keeps your home number, and the table gives one carrier from each of five places, taken from their websites. Other carriers’ conditions differ, so ask your own carrier before you leave.
| Home market | Carrier | What the website lists | What to confirm |
|---|---|---|---|
| Hong Kong | csl | Japan is listed as a VoLTE roaming area | Actual usability depends on local network coverage and compatibility conditions |
| Taiwan | Chunghwa Telecom | You must activate roaming data service, use a phone that supports VoLTE roaming, and turn on VoLTE and data roaming, otherwise voice, SMS and data may not work | Complete activation and phone settings before you leave |
| Mainland China | China Mobile | Receiving SMS is listed as free | The number needs a usable international roaming function; being able to receive SMS does not guarantee receiving bank codes |
| Singapore | Singtel | ReadyRoam Asia 6GB/30 days, S$18, with destinations including Japan | This is a data plan; voice and SMS charges are in the terms |
| Malaysia | Maxis | 7-day APAC data pass RM69, with covered regions including Japan | This is a data plan; voice and SMS charges are in the terms |
Roaming still uses your original number. For services that need a Japanese number, such as Mizuho’s SMS authentication, roaming does not help; GO also warns that overseas numbers may not receive SMS.
Keeping a Number, Expiry and What to Do Before You Leave Japan
Each carrier has its own way of keeping a number, and the fees, terms and SMS availability differ.
How Do You Keep a Number While Away from Japan Temporarily?
Docomo, au, SoftBank Simple Style and povo2.0 each allow it, on different terms.
| Provider | Method | Fee and term | Can it receive SMS in this period? |
|---|---|---|---|
| Docomo | Phone number storage | ¥440 per month (tax included), up to 6 years from the 1st of the month after application, with other fees and plan eligibility limits | Confirm with Docomo before applying |
| au | Temporary suspension (a pause that stores the number) | ¥409 per month (tax included), up to 5 years, plus a handling fee and related service fees | No; voice, internet, email and SMS are all unavailable |
| SoftBank Simple Style | Keep registering top-up cards | A separate 360-day number validity period starts the day after the usage period ends | Voice calls and SMS can be received in this period, but this plan cannot be used overseas |
| povo2.0 (a number plan; this rule is in the povo2.0 terms, not in the Japan SIM description) | Keep the plan active per the terms | If no paid top-up is bought for 180 days or more after povo2.0 activation, the line may be suspended or cancelled, and if the conditions are still not met 30 days after suspension the contract may be terminated; see the full terms for exceptions | Confirm with povo before applying |
Two things to remember:
- Keeping a number is not the same as receiving codes. If you need to keep receiving verification codes abroad, ask exactly what service is available during the retention period, and arrange the contact phone numbers for your bank and apps.
- Act before expiry. SoftBank Simple Style’s terms list failing to register a top-up card within the number validity period as a ground for cancellation. Docomo states clearly that after formal cancellation you cannot sign a new contract with the same number. For other providers, ask whether a number can be recovered after cancellation or suspension, and do not assume there is a grace period.
Can a Visitor Card Become a Long-Term Plan with the Same Number?
Check the terms card by card. SoftBank Prepaid SIM for Travel does not allow MNP in or out. A povo data-only line cannot be converted directly to a voice-plus-data plan, and purchased data top-ups cannot be moved to a new plan. A phone number on the card does not mean it can be ported.
How Do You Cancel Before You Leave, and What Does It Cost?
Qualifying new contracts cancelled within the period cost up to ¥1,100 at Docomo, au and SoftBank and up to ¥1,078 at Rakuten Mobile, and the method differs by provider.
| Provider | How | Early cancellation fee (applies only to the contracts listed) |
|---|---|---|
| Docomo | Online procedure, requiring a d account; some contracts need a store | For new individual lines signed from 1 July 2025, cancelling within 1 year costs ¥1,100 (tax included); where the monthly fee is below ¥1,100, the monthly fee is charged |
| au | Website accepts requests 24 hours; requests after 21:10 are completed the next day, and processing at month-end may spill into the next month | For new contracts signed from 1 October 2025 and cancelled within 1 year, up to ¥1,100; exceptions such as moving to UQ mobile or povo2.0, or cancelling within 8 days, follow the terms |
| SoftBank | Store or My SoftBank, with exceptions for some contracts | For new contracts or MNP joins from 1 July 2026, cancelling within 12 months from the month service begins costs up to ¥1,100 depending on the plan at cancellation |
| Rakuten Mobile | Through my Rakuten Mobile; a one-time password is sent to the registered email or by SMS to the Rakuten number | For the Rakuten Saikyo plan applied for and started from 1 April 2025, cancelled within 1 year, up to ¥1,078 (tax included); exceptions such as initial contract cancellation follow the terms |
| IIJmio Giga plan | Confirm with IIJmio | Minimum usage period runs to the end of the month in which billing starts; voice SIMs carry no cancellation penalty or MNP transfer-out fee; cancelling in the month of activation still incurs the full month’s charge |
SoftBank’s page lists conditions for new contracts from 1 July 2026 and does not state what applies to contracts signed before that date, so confirm with SoftBank; other carriers also have batches. Before a short stay ends, check which batch your contract date falls into, then count the months used. Confirm with the provider how device installments, add-on services and the final bill are settled.
Zagdim recommends cancelling while you are still in Japan. Rakuten’s one-time password may go to the Rakuten number itself, so before you leave confirm that the registered email can receive messages. For au, watch the 21:10 cut-off at month-end.
Checklist Before You Buy
Zagdim recommends checking these eight points before you buy.
- Does your phone support eSIM? Will a physical-SIM phone work?
- Does this card have voice, SMS, or is it data-only?
- Do the days count from the purchase date, the first communication date, or the start of use?
- Can you add data, and does adding data extend the validity?
- Do the services where you need codes accept this number?
- Can this card later keep the number for a long-term plan or be ported?
- For residents: are the name and address in the residence card’s IC chip current? How long is left on your period of stay?
- Before leaving Japan: cancel or keep the number? Where is it handled?
Four terms on Japanese listings are worth knowing:
- data only (No SMS/calls): Data only, with no SMS or voice.
- オープン価格 (open pricing): The retailer sets the price.
- 購入後、即時適用 (applies immediately after purchase): It takes effect as soon as you buy it.
- MNP できません (cannot port): The number cannot be ported.
FAQ
Can I get a SIM with a Japanese number with only a passport and no residence card?
Look at visitor voice plans. For example, when a Mobal voice SIM/eSIM is collected at a designated pickup point, you show your passport and order confirmation; delivery by post has its own document requirements. Docomo, au and SoftBank’s long-term plans list the residence card.
After the 2026 amendment, do I need ID to buy a travel data eSIM?
The amendment was promulgated on 29 May 2026 and, apart from some provisions, takes effect on a date set by a cabinet order within one year of promulgation. Which SIMs are covered is left to a ministerial ordinance of the MIC, so before buying go by the conditions the seller publishes at the time.
Can a data eSIM receive SMS verification codes from banks or apps?
It depends on the plan. povo Japan SIM and IIJ Japan Travel SIM Unlimited do not support SMS, so they cannot receive codes. To receive codes, use a plan that includes SMS or roam on your home number, and check the card’s functions before buying.
Can I still get a number if the address on my residence card differs from the IC chip?
Rakuten Mobile requires affected applicants to apply at a store, and the au online store requires you to update the name and address in the chip first. Other carriers must be checked individually.
How many Japanese numbers can one person have?
It differs by provider: au in principle 5, SoftBank 5 mobile lines (Simple Style at most 2), and Rakuten Mobile 10 in total across the plans listed. These are provider limits and should not be treated as a nationwide rule.
How do I keep my number if I leave Japan for a few months?
Docomo offers phone number storage (¥440 per month, tax included) and au offers temporary suspension (¥409 per month, tax included), each with other fees. SMS cannot be received during au’s temporary suspension, so anyone who needs codes abroad must make separate arrangements.
How much does it cost to cancel before I go home?
It depends on the contract date and plan. Qualifying new contracts cancelled within the period cost up to ¥1,100 at Docomo (new contracts from 1 July 2025), au (new contracts from 1 October 2025) and SoftBank (new contracts or MNP joins from 1 July 2026), and up to ¥1,078 at Rakuten Mobile. IIJmio Giga voice SIMs carry no cancellation penalty.
Important Notice
This article is general information and is not legal or consumer advice. It draws on the websites of the House of Councillors of Japan, the MIC, the statute database, and carriers, airports, banks and service platforms, with a reference date of 30 October 2026. The effective date and ministerial ordinance details of the amendment, plans, prices, application documents and cancellation conditions change; go by the latest announcements from each institution and provider. The providers listed here are an information summary and do not represent a recommendation or ranking.
Have a question about this guide? Leave a comment below, or ask Zagdim directly.
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Sources
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- China Mobile – International and Hong Kong, Macao, Taiwan roaming guide (https://www1.10086.cn/roaming/zizhu/myzn/)
- Singtel – Overseas Roaming Plans (https://www.singtel.com/personal/products-services/mobile/roaming/all-plans)
- Maxis – Maxis Roaming (https://www.maxis.com.my/en/mobile-plans/maxis-roaming/)
- NTT Docomo – How to cancel a mobile phone contract (https://www.docomo.ne.jp/support/cancel/)
- au – For customers considering cancellation or MNP transfer-out (https://www.au.com/support/service/mobile/procedure/contract/cancel/)
- au – Explanation of MNP and cancellation (https://www.au.com/content/dam/au-com/mobile/information/mnpkaiyaku_setsumei.pdf)
- SoftBank – Please tell me about cancellation (https://www.softbank.jp/support/faq/view/20447)
- Rakuten Mobile – Minimum usage period and cancellation handling fee (https://network.mobile.rakuten.co.jp/faq/detail/00001279/)
- IIJmio – Minimum usage period and penalty for Giga plans (https://help.iijmio.jp/answer/602dcfb207f19b00121870ae/)
- IIJmio – Prepaid SIM that can be used in Japan, VOICE SIM, DATA SIM (for those from abroad) (https://www.iijmio.jp/hdc/visitors/)
- Rakuten Mobile – How to cancel (https://network.mobile.rakuten.co.jp/guide/cancellation/flow/?l-id=guide_cancellation_guide_cancellation-flow)
- IIJmio – Japan Travel SIM Unlimited (Prepaid SIM) (https://tr.iijmio.jp/unlimited/)
- NTT Docomo – How to port a mobile number in from another carrier (MNP) (https://www.docomo.ne.jp/support/mnp_subscribe/)
- AnyFone JAPAN – Haneda Airport Wi-Fi rental and SIM pickup and return counter list (https://anyfone.com/pages/haneda-airport-store)
