You are about to move to Japan for a working holiday, a semester abroad, or a few months of remote work. You know you need a Japanese phone number. Then you find a company that will sell you one online, in English, before you have even packed — no residence card, no Japanese bank account, no shop visit.
And something feels wrong about it.
If getting a Japanese number is supposed to be this famously difficult bureaucratic ordeal, how is a website in your own country handing you one in ten minutes? Is this a real number, or some kind of foreigner-only workaround that Uber Eats and PayPay will reject the moment you land?
That instinct is reasonable. Here is the actual answer.
The short version
The number is real. It starts with 070, 080, or 090 — the same range every phone in Japan uses — and it works with the services you are worried about.
There are exactly two limitations worth knowing before you buy, and both are minor. They are in section 3, stated plainly rather than buried.
1. Why does this number work when others get rejected?
📌 [Image Placeholder 1 — Comparison diagram: 050 VoIP number (rejected) vs. 070/080/090 mobile number (accepted)] Alt text: Difference between a Japanese 050 internet phone number and a genuine 070 080 090 mobile number
There is nothing clever going on. Mobal and Sakura Mobile are MVNOs, which simply means they lease network capacity from Japan’s major carriers instead of building their own towers. Sakura Mobile states on its site that it borrows lines from docomo. Mobal states that its SIM and eSIM services run on the docomo network.
The signal is a Japanese carrier’s signal. The number comes from a Japanese carrier’s number pool. What these companies actually changed is the paperwork — English signup, passport instead of residence card, foreign credit cards accepted. They did not change the product.
So when a Japanese app sends you an SMS code, it lands. When a restaurant calls to confirm your booking, your phone rings.
The numbers that fail are 050 numbers. Skype numbers, 050Plus, and the free “phone number” bundled with cheap travel data SIMs are internet calling services, not mobile lines. They generally cannot receive standard SMS at all, and some Japanese companies exclude them outright — PayPay Bank, for example, states that phone-based verification does not work with 050 numbers or overseas calls.
Japanese apps have no category for “foreigner number.” They only distinguish between a mobile line and one that isn’t. Yours is a mobile line.
2. What you can actually do with it
The useful rule of thumb: In most cases, if a service verifies you by sending an SMS or calling a standard Japanese mobile number, it should work. That covers most of what makes daily life in Japan possible.
Messaging, food and getting around
Register a Japanese LINE account, or migrate your existing one. Order on Uber Eats and Demae-can, and take the call when the driver cannot find your building or the intercom auto-dials you. Sign up for GO and S.RIDE to get a taxi. Book a table on Tabelog, Hot Pepper or TableCheck and receive the confirmation text — or the call from the restaurant asking about allergies.
Payments
Create a PayPay account with SMS verification and pay at convenience stores, cafés and supermarkets from day one. Top it up with cash at any Seven Bank or Lawson Bank ATM; you do not need an account at those banks to do it. Pass SMS-based two-factor authentication on the shopping and marketplace apps you will end up using.
Housing and work
Sign a lease with a foreigner-friendly share house or monthly apartment operator before your residence card exists. Call traditional real estate agents, book viewings, and — critically — be reachable when the rent guarantor company phones to screen you, because they will, and an unanswered call can sink the application. Apply for jobs on Baitoru or Townwork and receive the callback.
Official life and emergencies
Write a real domestic number on your city office residency paperwork. Dial 110 for police and 119 for fire and ambulance directly, which a data-only SIM cannot do.
3. The two limitations, stated honestly
Any article that tells you a service is flawless is selling you something. Here is where these numbers behave differently from a direct docomo contract.
① LINE: ID search is disabled
Messaging, voice calls, group chats, stickers, LINE Pay — all fine. What does not work is finding people by searching their LINE ID.
That feature sits behind an age-verification check that queries the carrier’s own subscriber records, and MVNOs like these do not have that connection. Sakura Mobile says so directly in its own support documentation.
In practice: you add friends by QR code, by sharing a profile link, or by phone number. Nobody in Japan searches by ID anymore anyway. This costs you roughly nothing.
② PayPay: instant for spending, extra steps for banking
Works the moment you have the number: creating the account, paying at the register, loading cash at a convenience store ATM.
Needs a residence card: linking a Japanese bank account, sending money to other people, and withdrawing your balance back out. These require in-app government ID verification (eKYC).
Two things worth knowing before you plan around this. Registering a foreign credit card to PayPay is being discontinued, so ATM cash top-ups are now the practical route for new arrivals. And if you were issued a residence card after 14 June 2026, PayPay has announced that the new card format cannot yet be used for its ID verification — so bank linking may have to wait regardless.
4. How to escape the “no address, no number / no number, no apartment” loop
This is the trap that eats everyone’s first two weeks. You need an address to get a phone contract from a normal carrier, but the city office and every landlord want a phone number. Here is the way through it.
- Order online before you fly. Both companies ship internationally or hold your SIM for airport collection.
- Collect it at the airport with your passport. No residence card required for this route — which is exactly why the route exists.
- Use the number to find housing. Share houses and monthly apartments will contract with you on a passport alone.
- Register that address at your city office and get it printed on your residence card.
- Open a bank account with the updated card and an active phone number.
The phone number is the thing that breaks the circle. Get it first.
5. Frequently asked questions
Do I really need no documents at all?
No — that is a misunderstanding worth correcting, because it is the thing that makes people suspicious in the first place.
Japanese law requires identity verification for every voice line, and providers must comply. You will show your passport when you collect your SIM. Since 1 April 2026 this applies even more broadly: an ID check is now required for essentially all SIM and eSIM purchases in Japan, including data-only tourist plans.
What these providers waive is the residence card, not identification. That is the difference, and it is the whole reason the number is trustworthy enough for banks and landlords in the first place.
Can I do everything online without picking anything up?
Increasingly, no — and this changed recently. Japan tightened its telecom identity rules in April 2026, retiring the old method of simply uploading a photo of your ID with a selfie. Verification now generally runs through IC chip reading or Japan’s My Number public authentication system.
For someone arriving without a residence card, airport pickup remains the cleanest and most reliable path. Choosing delivery or an emailed eSIM usually requires a Japanese address on an official ID, which you will not have yet.
Can I cancel easily when I leave Japan?
Yes. Both providers run month-to-month with no minimum term and no cancellation fee, and you can close your account online in English. If your plans stretch or shrink, you are not trapped.
Can I keep my number if I switch carriers later?
Yes. Once you have your residence card and want to move to a cheaper mainstream plan, Japan’s number portability system lets you take your 070/080/090 number with you. Sakura Mobile supports transfers in; check the current terms with your provider before you rely on transferring out.
6. Which one should you choose?
Both give you a genuine Japanese mobile number with English support. The difference is emphasis.
| Mobal | Sakura Mobile | |
|---|---|---|
| Best for | Value-focused stays: working holidays, students, longer budget trips | Anyone who wants a person to talk to when something goes wrong |
| Support | English email support | Dedicated English support, Japan-based |
| Without a residence card | Passport at airport or partner pickup point | Passport at airport or the Shinjuku office |
| Payment | International cards and PayPal | International credit and debit cards |
| Contract | Month-to-month, no cancellation fee | Month-to-month, no cancellation fee |
Get Your Japanese Number SIM Card → Not sure which? Dial *#06# — if a 32-digit EID appears, your phone takes an eSIM.
Sakura Mobile Get Your Japanese Number eSIM / SIM Card → Voice + Data plan. Pick it up at the airport or the Shinjuku office with your passport. Both give you a real 070 / 080 / 090 number, so SMS verification works. Month-to-month, no cancellation fee.
