You can get a Japanese phone number for ordinary calls and text messages without opening a Japanese bank account first. The key is choosing a voice-capable mobile phone plan, not a cheap internet-only travel plan. A SIM is the small card that connects your phone to a mobile network; an eSIM is the digital version built into a compatible phone. SMS simply means text messages, including some login codes. Two providers worth comparing are Mobal and GTN Mobile, companies selling Japanese mobile services to travellers and newcomers. They accept different payment methods and identification documents, so a number is only useful if you can actually activate it and receive calls and texts.
Budget both payments, not just the monthly advertisement: One Mobal official Voice Lite eSIM page presentation lists ¥4,950 at purchase + ¥990 per full month; a different Mobal page presentation has listed ¥3,300 at purchase + ¥990 per month. These are examples from different page versions, not two guaranteed checkout options. Verify the exact Voice Lite product and eSIM purchase price in your own checkout; Voice+Data is a separate product with its own purchase price. The first activation month is prorated. These are two different charges, not one ¥990 all-in setup fee. (Mobal official prices)
The task is often awkward because one service asks for a Japanese phone number while a typical domestic phone contract may ask for a local payment method or verified Japanese address. You do not need to solve those two tasks in the wrong order: first obtain a suitable mobile number through a documented alternative, then separately fulfil the bank's own identity/address requirements. See the wider first-month Japan registration plan for the order of other arrival tasks.
Three newcomers, three better phone choices
| Your situation | What is workable now | What could go wrong |
|---|---|---|
| New long-term resident, 18 or older, foreign Visa/Mastercard or PayPal, no Japanese bank account | A long-term voice+SMS eSIM or SIM sold with supported overseas payment and in-person passport pickup; Mobal lists these features. | Physical access code/identity verification can delay activation; eSIM support and card authorisation must work. |
| 30–90-day visitor who needs voice + SMS before a resident contract | GTN Prepaid Data + Voice, in a participating shop with passport and credit card, or an equivalent confirmed short-term product. | GTN's prepaid number is a temporary solution; do not assume it can be kept after the plan expires. |
| Arriving with cash only, no eligible card, and a bank asking for SMS | Neither named option is a guaranteed immediate solution. Mobal says it does not take cash; GTN's purchase form requires a credit card for voice service. | Buying a data-only eSIM will not create a voice number. Arrange an accepted payment method or seek a different operator whose exact current requirements you can meet. |
Why this table matters: GTN's general magazine says a passport-based prepaid option may not need a Japanese bank account or credit card, but GTN Mobile's current direct voice application explicitly requires a passport, valid ID and credit card for in-store purchase. For an actual purchase, prefer the specific operator order page over a broad marketing introduction. No-card acceptance is not verified, and we do not promise it.
What exactly are you buying?
| Product type | Gives you a traditional Japanese mobile number? | Relevant use |
|---|---|---|
| Data-only tourist eSIM | No voice number; it provides mobile data, not an ordinary 070/080/090 voice subscription. | Maps, email, messaging apps that work through data. |
| Data + SMS product | May receive SMS but may not provide ordinary voice calls or the same eligibility at banks. | Confirm the exact sender/verification compatibility before relying on it. |
| Voice + SMS SIM/eSIM | Yes, for a properly provisioned Japanese mobile product (typically 070/080/090). | Calling your landlord, receiving SMS, some account registrations, everyday local contact. |
| 050 internet phone/VoIP | A different number/service category; not equivalent to a normal mobile voice SIM. | Useful for some calls, but not a promised substitute for mobile SMS or banking authentication. |
A mobile number is not a bank-account approval. Even an ordinary voice/SMS number does not prove you meet residence-card, address, age or banking anti-fraud conditions. Some bank apps require a specific identity and verification channel, and some block certain virtual numbers. The correct test is whether your chosen bank's actual signup instructions accept your activated number, not whether a seller advertises “OTP available”.
Real prices and commitments from the sellers
Mobal price example, not a universal quotation: A snapshot of Mobal's standard voice-eSIM listing shows ¥4,950 paid when ordering and a separate plan payment on activation: ¥990 per full calendar month for Voice Lite (Japanese number, voice/SMS and 500MB limited data), or from ¥1,650/month for a Voice+Data plan. Another official Mobal landing-page presentation has shown ¥3,300 for the Voice Lite eSIM purchase. Neither observed price is a promise about the current offer in your region, referral link or checkout. Identify the exact Voice Lite vs Voice+Data product and verify the one-time price and first-month proration before paying. (Mobal current prices; Mobal activation billing)
Worked budgets using the ¥4,950 purchase-price listing, a full first calendar month and no outgoing-call/SMS extras:
- Voice Lite (voice + SMS, limited 500MB data): if your checkout actually shows ¥4,950, budget ¥4,950 purchase + ¥990 full-month plan = ¥5,940. If it instead shows ¥3,300, the equivalent example is ¥3,300 + ¥990 = ¥4,290. These are calculations, not guaranteed offers; monthly fees may be prorated. Following full months are ¥990 before usage charges.
- Voice+Data with 1GB: Mobal's standard Voice+Data eSIM listing currently shows ¥4,950 purchase and ¥1,650/month for its 1GB plan. At those displayed standard rates, ¥4,950 + ¥1,650 = ¥6,600 for a full first month, before outgoing call/SMS charges. This is a dated price example, not a guaranteed checkout quote; verify the exact Voice+Data purchase and monthly amounts. A partial first month may be prorated.
Important Voice Lite data limit: Mobal includes 500MB of limited data. Beyond 500MB, Mobal states a flat ¥2,500 extra charge may apply. Outgoing calls and SMS also cost extra. Voice Lite is for people primarily needing a real Japanese phone number rather than regular mobile Internet. The supplier has displayed more than one Voice Lite purchase price across its official page variants; the ¥990 recurring price is not the complete first-payment cost. Check the exact purchase price and data terms at checkout. (Current Voice Lite pricing and limits)
Avoid surprise mobile-data charges: If you buy Voice Lite only to receive verification SMS, turn off mobile data for that eSIM in the phone settings. Crossing 500MB may trigger ¥2,500, and Mobal says overage can be billed 1–2 months later. Check the official data guide and review delayed invoices even if you later cancel.
The selected eSIM/access-code purchase charge is one-time, not a monthly charge. Conversely, ¥990/month does not include that initial purchase, whose amount can differ by displayed offer. Outgoing calls, texts, add-ons and any plan-specific fees can increase the total. For the voice-number product Mobal provides a physical eSIM access code for pickup or delivery after identity checks, not an immediately emailed QR code; its official pickup ID guidance requires passport and order confirmation. If delivery is selected, review the destination and identity requirements. Read the final checkout summary before paying.
GTN prepaid: The actual voice+data order page lists ¥8,250 for 10GB/30 days, ¥14,850 for 10GB/60 days and ¥21,450 for 10GB/90 days, tax included on its published plan. The 30GB variants cost more. Local calls on the quoted offer are separately charged (the listing shows ¥22 per 30 seconds). Store availability and pricing can differ. It says voice plan purchases are in-store and require a passport, valid ID and credit card; do not assume a foreign card will be authorised without checking its issuer/network at purchase.
The offers aren't directly equivalent: Mobal is a recurring long-term base-rate product with potential initial and usage charges, whereas GTN examples are fixed-duration packages with included data. A mathematically cheaper monthly advertisement may be worse if the account cannot be activated or closed under the conditions you need.
The safest setup order before your first appointment
A new student in Tokyo with an accepted foreign card and an eSIM-capable phone can do the following:
- Decide whether they need ordinary voice calls plus incoming SMS. If yes, rule out data-only plans and unsupported virtual-number workarounds.
- Before paying, check that the handset is network-unlocked, supports eSIM, 4G/LTE Band 1 (2100 MHz) and VoLTE for Mobal voice calls; see its official compatibility list. If it fails an eSIM requirement, ask about a compatible physical voice SIM instead. Keep working internet for initial setup.
- Choose an appropriate-duration provider, read its real voice identity/pickup requirements and use the permitted method. For a Mobal pickup, have the matching order confirmation and passport; do not assume instant online-only activation.
- Activate the number and test one actual incoming voice call and one SMS before placing it on lease, employment or bank forms. Store your account credentials and plan expiry/renewal terms.
- Open the bank account with the bank's separately required residence and identity records. Enter the verified phone number only where the bank accepts it and keep it active while account verification is pending.
A visitor who only needs data: choose data-only if all they need is maps and chat, rather than paying for a short-lived local voice number. A resident expecting to stay years: avoid building every new account around a number with a 30-day life unless its continuation/portability to a sustainable plan is explicitly supported.
When the plan fails, fix the right failure
| Failure | Correct next action |
|---|---|
| eSIM arrives as a listing but no mobile number appears | Verify voice+SMS, not data-only; check completion of identity and activation, not just successful payment. |
| Shop asks for credit card although a guide said “passport only” | The product-specific GTN voice checkout requirements control; stop before purchasing, do not claim a cash exception. |
| A foreign card is rejected online | Do not re-purchase repeatedly without knowing whether the first order completed. Keep the order/error reference and ask the provider whether a supported alternative card or PayPal is available for that plan. |
| Bank rejects the activated mobile number | Keep the service running and identify whether the issue is the number category, SMS reception or the bank's separate identity/account rule. A phone provider cannot waive banking checks. |
| Your temporary voice plan will expire during an employment or bank process | Before expiry, confirm actual renewal and number portability terms with the provider. Do not assume another prepaid SIM will retain the number. |
The costly mistake is buying a cheaper data-only plan to satisfy an SMS-and-voice requirement, then paying again. It is also possible to buy the right voice service but use the wrong identity collection route and miss a first-day housing appointment. A small amount of preparation around passport, payment method and activation date is more useful than a giant list of SIM brands.
For a resident trying to budget, combine these costs with Japan's living costs. For employment-linked contact numbers, see working and long stays.
Your next action: Choose your real scenario—short stay or long stay, data-only or voice+SMS, available payment method, and actual ID—before checking a mobile plan. A genuine number can come before the bank account; bank acceptance of that number is a separate test.