Japanese Phone Number for Foreign Residents: 090/080/070 SIMs vs Data-Only eSIMs (2026)

If you're a foreign resident in Japan, getting a phone number that starts with 090, 080, or 070 is essential for banking, rental contracts, and official registrations. Data-only eSIMs (like Airalo or Saily) give you internet but no voice number, so they won't work for most administrative needs. This guide covers which providers offer real Japanese numbers, what documents you need, and how to avoid common pitfalls.

What Counts as a Real Japanese Phone Number?

A real Japanese phone number is a 10- or 11-digit number starting with 090, 080, or 070. These are issued by mobile carriers (MNOs) or their MVNO partners and are recognized by banks, government offices, and landlords. Data-only eSIMs assign no number at all, or sometimes a non-standard one that won't pass verification. For example, a bank's SMS verification or a rental contract's emergency contact field will reject a data-only line.

What Counts as a Real Japanese Phone Number? — Photo by Clement Souchet on Unsplash

Options That Give You a Real Japanese Number

1. Major Carriers (docomo, au, SoftBank)

These require a residence card (在留カード), a Japanese bank account or credit card, and a contract of at least one year. They offer the most reliable service but often have high monthly fees (¥3,000–¥7,000) and strict cancellation penalties. Per the official terms, you must be a resident with a visa valid for at least 6 months.

Options That Give You a Real Japanese Number — Photo by Andre Benz on Unsplash

2. MVNOs with Voice SIMs (Sakura Mobile, Mobal, etc.)

MVNOs like Sakura Mobile and Mobal offer voice SIMs with a real 090/080/070 number. They are more flexible for foreigners: some accept foreign credit cards and allow online application before arrival. According to Sakura Mobile's application procedure (source: sakuramobile.jp), you need a residence card, a passport, and a credit card. Mobal's Japan SIM with a Japanese number (mobal.com) also provides a real number and can be shipped overseas. These plans typically cost ¥1,500–¥4,000 per month for voice + data.

3. Prepaid SIMs (e.g., b-mobile, IIJmio)

Some prepaid SIMs include a voice number, but they often require a residence card and a Japanese address. They are harder to find for short-term stays. b-mobile offers prepaid voice SIMs that require a residence card and Japanese address, while IIJmio's prepaid options are limited to data-only for short-term visitors.

Documents You Need (Per Official Sources)

Based on Japan Mobile Guide (japanmobileguide.com, verified July 30, 2026) and Sakura Mobile, the standard documents are:

• Residence card (Residence Card) – must be valid and show your current address.
• Passport – for identity verification.
• Credit card or Japanese bank account – for payment. Some MVNOs accept foreign credit cards.
• My Number card (My Number Card) – sometimes required for online applications.

If you don't have a residence card yet (e.g., on a tourist visa), you cannot get a postpaid voice SIM. Prepaid data-only SIMs are available but won't give you a real number.

Why Data-Only eSIMs Fall Short

If you already have a data-only eSIM, here's specifically where it falls short for resident life:

• You cannot receive SMS from banks or government services.
• You cannot register for LINE or other apps that require phone verification.
• You cannot list the number on a rental contract or emergency contact.
• You cannot make or receive regular phone calls.

Why Data-Only eSIMs Fall Short — Photo by Daryan Shamkhali on Unsplash

Decision Checklist

• Do you need a number for banking/contracts? → Get a voice SIM (MVNO or major carrier).
• Are you staying less than 3 months? → Consider a prepaid voice SIM (if eligible) or a data-only eSIM + VoIP (but VoIP may not work for all verifications).
• Do you have a residence card? → Yes: you can apply for most voice SIMs. No: you cannot get a postpaid voice number.
• Can you use a foreign credit card? → Some MVNOs (Sakura Mobile, Mobal) accept them; major carriers usually require a Japanese card.

Common Mistakes to Avoid

• Assuming a data-only eSIM gives you a number – it doesn't.
• Applying for a major carrier without a Japanese bank account – you'll be rejected.
• Not checking the cancellation fee – some contracts charge ¥10,000+ if you leave early.
• Using a friend's address – the SIM must be registered to your own residence card address.

Comparison Table: Voice SIM Options for Foreign Residents

Bottom Line

For foreign residents, a voice SIM from an MVNO like Sakura Mobile or Mobal is the most straightforward way to get a real Japanese number. Data-only eSIMs are useful for internet access but cannot replace a voice number for official purposes. Start with Sakura Mobile or Mobal if you need a number quickly — both accept foreign credit cards and ship overseas, so you can have a working Japanese number within days of arrival. Forex and investment products carry risk; this guide is for informational purposes only and does not constitute financial or legal advice.

FAQ

Can I get a Japanese phone number without a residence card?

No, you cannot get a postpaid voice SIM (with a 090/080/070 number) without a valid residence card. Prepaid data-only SIMs are available for tourists, but they do not provide a real phone number. Some MVNOs may accept a passport and visa for short-term contracts, but this is rare. Always check the provider's official terms.

What documents do I need to get a SIM card in Japan as a foreigner?

Per Japan Mobile Guide (verified March 30, 2026), you typically need: a valid residence card, a passport, and a credit card or Japanese bank account. Some MVNOs like Sakura Mobile accept foreign credit cards. A My Number card may be required for online applications. Without a residence card, you cannot get a postpaid voice SIM.

Can I use a data-only eSIM for banking and official registrations?

No, data-only eSIMs (like Airalo or Saily) do not provide a voice number, so they cannot receive SMS from banks or government services. You need a real 090/080/070 number for most official verifications. Data-only eSIMs are only suitable for internet access, not for administrative needs.

Which MVNOs give a real Japanese phone number for foreigners?

Sakura Mobile and Mobal are two MVNOs that provide real 090/080/070 numbers for foreign residents. They accept foreign credit cards and allow online application. Mobal can even ship the SIM overseas before you arrive. Monthly fees range from ¥1,500 to ¥4,000. Check their official sites for current terms.

Sources & Verification

Fact-checked on 2026-07-30:

• "Sakura Mobile requires a residence card, passport, and credit card for voice SIM application." — https://www.sakuramobile.jp/monthly/voice/application-procedure/ (2026-07-30)
• "Data-only eSIMs do not provide a voice number and cannot be used for banking or official registrations." — https://tokyocheapo.com/living/how-to-get-a-japanese-phone-number/ (2026-07-30)
• "Standard documents for a SIM card in Japan include a residence card, passport, and credit card or Japanese bank account." — https://www.japanmobileguide.com/blog/what-documents-do-you-need-sim-card-japan (2026-07-30)
• "Mobal offers a Japan SIM with a real Japanese number and can be shipped overseas." — https://www.mobal.com/japan-sim-card/ (2026-07-30)