How to Get a Japanese Phone Number as a Foreigner (2026 Guide)

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Introduction: Why You Actually Need a Japanese Phone Number

Let me tell you something nobody told me before I moved to Japan: without a Japanese phone number, you’re basically a ghost. You can’t sign up for most online services. You can’t verify your identity for banking apps. You can’t register for loyalty programs, set up utilities, or even create a LINE account properly (and trust me, LINE is how Japan communicates — not WhatsApp, not iMessage).

When I first arrived, I naively thought my international roaming plan would hold me over. It did — for about three days, until I realized I couldn’t open a bank account, couldn’t sign up for Amazon Japan, and couldn’t even register at my local gym without a Japanese 080 or 090 number.

The good news? Getting a Japanese phone number in 2026 is dramatically easier than it was even a few years ago. The days of needing a two-year contract, a personal seal (hanko), and a Japanese guarantor are largely behind us. Whether you’re here on a tourist visa, a working holiday, or a long-term work visa, there’s an option that fits your situation.

In this guide, I’ll walk you through every realistic option — from budget MVNOs to major carriers, eSIMs to prepaid SIMs — with honest pros and cons based on real expat experience. Let’s get you connected.

Quick Comparison: Best Ways to Get a Japanese Phone Number in 2026

Before we dive deep, here’s a snapshot of your main options:

Now let’s break each of these down with real talk about what it’s actually like to sign up and use them.

Rakuten Mobile — Best Overall for Expats in 2026

If I had to pick one recommendation for most foreigners moving to Japan, it’s Rakuten Mobile. Here’s why: the signup process is foreigner-friendly, the pricing is genuinely excellent, and you get a real Japanese phone number (070, 080, or 090 prefix).

Rakuten’s “Rakuten Saikyo Plan” (最強プラン) charges you based on data usage: up to 3GB for ¥1,078, up to 20GB for ¥2,178, and unlimited data for ¥3,278. That unlimited tier is the cheapest true unlimited plan in Japan, period.

What you need to sign up:

• Residence card (在留カード) — this is the big one
• A Japanese address
• A credit card or debit card (international cards sometimes work, but a Japanese card or Wise debit card is more reliable)
• An unlocked phone that supports Rakuten’s bands

You can sign up online (the website has partial English support) or visit a Rakuten Mobile store. I’d actually recommend the store if your Japanese is limited — the staff are generally patient and used to helping foreigners.

Pros:

• Cheapest unlimited data plan in Japan
• No contract lock-in period
• Free Rakuten Link app for unlimited domestic calls
• eSIM support (activate instantly)
• Earns Rakuten Points (useful if you shop on Rakuten)

Cons:

• Coverage in rural areas and underground can be spotty (though it’s improved massively in 2026 with roaming agreements with au’s network)
• Signup requires a residence card — tourists can’t use this
• English support is limited compared to Mobal

LINEMO — SoftBank’s Budget Brand, Quietly Excellent

LINEMO is SoftBank’s online-only budget brand, and it’s become a sleeper favorite among expats who want solid coverage without breaking the bank. The Mini Plan gives you 3GB for just ¥990/month, while the Smartphone Plan offers 20GB for ¥2,728.

The killer feature? LINE app usage doesn’t count against your data. In a country where LINE is the default messaging app for everything from work communication to doctor appointments, this is genuinely huge.

What you need to sign up:

• Residence card
• Japanese address
• Credit card or PayPay balance

Signup is online-only and in Japanese, so you’ll want to use browser translation or ask a Japanese-speaking friend for help. Once you’re set up, though, it just works.

Pros:

• Runs on SoftBank’s main network (excellent coverage)
• LINE data is free and unlimited
• Very affordable
• eSIM available
• No contract period

Cons:

• Online-only — no physical stores for support
• Signup process is entirely in Japanese
• Limited plan options (only two tiers)

Ahamo — Docomo Quality at a Fair Price

Ahamo is NTT Docomo’s online sub-brand, and it hits a sweet spot for expats who want rock-solid coverage and a simple plan. For ¥2,970/month, you get 20GB of data, and here’s the bonus: that 20GB includes roaming data in 82 countries. If you travel frequently for work or visit home regularly, this is incredibly convenient.

Docomo has the most reliable network in Japan, especially in rural areas. If you’re living outside Tokyo or Osaka, Ahamo on Docomo’s network is arguably your best bet.

Pros:

• Docomo’s premium network — best rural coverage
• International roaming included (20GB in 82 countries)
• Simple, one-plan structure
• 5-minute domestic call free included

Cons:

• Only one plan at ¥2,970 (plus a 100GB option at ¥4,950)
• Online-only signup in Japanese
• No physical store support (though Docomo shops offer limited help for ¥3,300)

Mobal — The Foreigner-Friendly Option (English Support!)

Mobal specifically targets foreigners in Japan, and their entire signup process is in English. This is a massive advantage if you’ve just arrived and your Japanese isn’t functional yet. They’ll even ship a SIM to your address before you arrive in Japan, or you can pick one up at the airport.

Mobal offers a voice + data SIM with plans starting at ¥1,980/month for 3GB. It’s not the cheapest option, but you’re paying for the peace of mind of English customer support via email, chat, and phone.

What you need:

• Passport (they accept tourist visa holders for some plans!)
• International credit card
• Japanese address (for delivery)

Pros:

• Entire process in English — signup, support, billing
• Available to tourists and short-term visitors (some plans)
• Can get a SIM before arriving in Japan
• Real Japanese phone number included

Cons:

• More expensive than Japanese MVNOs
• Coverage depends on which network they’re reselling (currently SoftBank)
• Data speeds can be throttled during peak hours

If you’re just arriving and feeling overwhelmed, Mobal is a solid starting point. You can always switch to Rakuten or LINEMO once you’re settled and have your residence card. Check out our best SIM card for Japan expats guide for a deeper comparison.

IIJmio — The Data Bargain Hunter’s Choice

IIJmio (Internet Initiative Japan) is one of Japan’s oldest MVNOs and offers some of the best value for data-heavy users. Their voice + data plans start at just ¥850 for 2GB, and you can get 20GB for around ¥2,000. They frequently run promotions where the first few months are heavily discounted.

The downside? The signup process is entirely in Japanese, and support is also primarily in Japanese. This is one for the expats who’ve been here a while or who have a Japanese-speaking partner to help navigate the initial setup.

Pros:

• Extremely affordable data plans
• eSIM support
• Frequent discounts and promotions
• Data sharing between multiple SIMs possible

Cons:

• Japanese-only signup and support
• Speeds can slow during peak hours (lunch and evening)
• Not as intuitive for newcomers

Major Carriers: Docomo, au, SoftBank — The Full-Service Route

Japan’s three major carriers — NTT Docomo, au (KDDI), and SoftBank — still exist as full-service options with physical stores everywhere. They’ve largely abandoned the old two-year contract lock-in model, so you’re no longer trapped.

The main advantage? In-person support at hundreds of stores nationwide. If something goes wrong with your phone or you need help with settings, you can walk into a shop and get face-to-face assistance. For some people, this peace of mind is worth the premium.

Plans typically run ¥4,000–¥8,000+ per month depending on data usage. You’ll need your residence card, Japanese address, and typically a Japanese bank account or credit card.

When this makes sense:

• You want to buy a phone on an installment plan
• You need reliable in-store support
• Your employer is paying for it
• You’re in a very rural area where MVNO coverage might be inconsistent

What About Tourists? Getting a Number Without a Residence Card

If you’re visiting Japan on a tourist visa and need a phone number (not just data), your options are more limited but not impossible:

• Mobal Visitor SIM: One of the few services that provides a real Japanese phone number to tourists. Available for purchase online before your trip.
• Brastel 050 Numbers: A VoIP-based service that gives you a 050 IP phone number. It’s not a “real” mobile number (some services won’t accept 050 numbers for verification), but it works for basic calling.
• Tourist eSIMs (Ubigi, Airalo, etc.): These provide data-only connectivity. Great for navigation and messaging, but no Japanese phone number included. Still, they’re useful as a bridge solution. Make sure you have a reliable VPN for Japan to access your home country services while using local data.

For most tourists on a short trip, a data-only eSIM combined with Wi-Fi calling on your home number works fine. But if you’re here for more than a couple of weeks and need to sign up for services, Mobal is your best bet.

Buying Guide: How to Actually Set Up Your Japanese Phone Number

Here’s the step-by-step process most expats follow. This assumes you’re arriving on a work visa, student visa, or other mid-to-long-term visa:

Step 1: Get Your Residence Card

You’ll receive this at the airport (for some visa types) or at your local immigration office. This is your golden ticket for almost everything in Japan, including phone service. Without it, your options are limited to tourist-friendly services like Mobal.

Step 2: Register Your Address at City Hall

Within 14 days of moving into your apartment, you need to register at your local ward/city office (区役所/市役所). Many phone providers will want to see the address on your residence card, which gets updated after registration.

Step 3: Choose Your Provider

Based on the comparisons above, pick the provider that matches your needs. For most newcomers, I recommend starting with Rakuten Mobile or Mobal.

Step 4: Prepare Your Documents

• Residence card (front and back)
• Credit card or debit card
• Your Japanese address
• An unlocked smartphone (check band compatibility — most recent iPhones and Samsung Galaxy phones work fine in Japan)

If you need an affordable unlocked phone, check options on Amazon for unlocked smartphones before you travel, or buy one at an electronics store like Yodobashi Camera or Bic Camera after arrival.

Step 5: Sign Up (Online or In-Store)

Online: Upload photos of your residence card, fill in your details, choose physical SIM or eSIM. Physical SIMs arrive in 2-5 days by mail. eSIMs activate within hours.

In-store: Bring your residence card and credit card. Staff will handle everything. Expect to spend 30-60 minutes. Weekend waits can be long — go on a weekday morning if possible.

Step 6: Activate and Test

Insert the SIM (or activate the eSIM via QR code), follow the APN settings instructions, restart your phone, and make a test call. Congratulations — you now have a Japanese phone number!

Pro Tips From Experience

• Save your phone number immediately. You’ll be asked for it constantly — at the doctor, at the bank, when signing up for anything. I keep mine in a note on my phone’s lock screen.
• Set up LINE right away with your new number. This is your primary communication tool in Japan.
• Consider a portable charger. You’ll be using your phone for everything — maps, translation, train apps, payments. A solid Anker portable charger is an expat essential.
• Keep your old number active if possible. Two-factor authentication on your home country accounts may still use your old number. Consider keeping it alive through a cheap plan or Google Voice (for US numbers).

Frequently Asked Questions

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

Yes, but your options are limited. Mobal offers plans to tourists and short-term visitors using just a passport. You can also get a 050 VoIP number through services like Brastel without a residence card. However, most mainstream carriers and MVNOs (Rakuten, LINEMO, Ahamo, IIJmio) require a valid residence card. If you’re planning to stay long-term, getting your residence card should be your first priority.

What’s the difference between 070, 080, and 090 phone numbers in Japan?

These are all standard Japanese mobile number prefixes. 090 numbers were issued first, followed by 080 and then 070. There’s no practical difference in functionality or prestige — they all work identically. Some older Japanese people associate 090 numbers with being “established” since they’ve been around longest, but honestly, nobody actually cares what prefix you have. You’ll typically be assigned whatever is available