Japan SIM card plans for foreigners vary more by visa type than most comparison sites let on. Getting a SIM card in Japan is one of the first things you’ll sort out after landing — and one of the first places foreigners run into unexpected friction. The rules differ depending on whether you’re here for two weeks or two years, which carrier you choose, and what visa you hold. IIJmio starts at ¥850 per month. Docomo offers the widest coverage but charges significantly more. AEON Mobile sits somewhere in the middle. This post breaks down the real costs, document requirements, and setup steps so you can get connected without wasting a trip to a store.
Tourist data SIMs — sold at airports and convenience stores — are not the same as monthly contract SIM plans for residents. Tourist SIMs are prepaid, data-only, and expire. Resident plans require a Residence Card (在留カード / Zairyu Card) and give you a Japanese phone number with a monthly billing cycle. Make sure you’re buying the right type for your situation before you hand over your passport.
What Is a Japan SIM Card Plan for Foreigners?
Japan’s mobile market splits cleanly into two categories: SIM-only plans and device bundles. Knowing which one you’re looking at will save you from signing something you didn’t intend to.
Understanding SIM-Only Plans vs. Device Bundles
A SIM-only plan (SIMのみプラン) gives you a physical SIM or eSIM profile that you drop into your own unlocked phone. No device purchase required, no 24-month commitment to a handset you didn’t want. These plans are sold online or through electronics stores like Yodobashi Camera and Bic Camera, and many of them — especially through MVNOs (Mobile Virtual Network Operators) — have no cancellation fee at all.
A contract plan (契約プラン) bundles phone service with a device. You sign a longer agreement, sometimes 24 months, and the carrier finances the handset into your monthly bill. These make sense if you need a Japanese-market phone. For most expats who arrived with an unlocked device, SIM-only is the cheaper and more flexible path.
How Japan’s Three Major Carriers Differ
NTT Docomo, SoftBank, and au (KDDI) own Japan’s physical network infrastructure. Every MVNO — IIJmio, AEON Mobile, Rakuten Mobile — rents capacity from one of these three and resells it at lower prices. The trade-off is usually speed during peak hours: MVNO customers share bandwidth with less priority than the carrier’s own subscribers. Docomo has the broadest rural coverage, which matters if you’re outside major cities. SoftBank and au are strong in urban areas but can drop off faster in the countryside. According to e-housing.jp’s breakdown of Japanese phone plans for foreigners, the choice between carriers often comes down less to network quality and more to which MVNO partners each one supports — and what documentation that MVNO accepts.
Who Is Eligible to Get a SIM Card in Japan?
Japan has some of the strictest SIM registration rules in the developed world. This isn’t bureaucracy for its own sake — it’s tied directly to anti-fraud law, and carriers take it seriously.
Requirements for Tourists vs. Long-Term Residents
Tourists can buy prepaid data SIMs at airports, convenience stores, and electronics stores with just a passport. These are data-only — no calls, no Japanese phone number — and they expire after 7 to 30 days depending on the plan. Some tourist SIMs require no registration at all and activate on insertion. Long-term residents — anyone on a work visa, student visa, spouse visa, or permanent residency — can access full monthly contract SIM plans with a Japanese phone number. These require a Residence Card and a Japanese payment method. Some carriers also ask for a My Number (個人番号 / Kojin Bangō), though not all do.
Documentation You’ll Need Based on Your Visa Type
The documents you need depend on the provider and plan type. Work visa and student visa holders need a Residence Card (在留カード), a Japanese bank account or credit card, and sometimes a My Number. Spouse and dependent visa holders need the same; some carriers also request your sponsor’s documentation. Tourists with data SIMs need only a passport — no address or bank account required. Permanent residents (永住者) need a Residence Card and are treated the same as Japanese nationals for most carriers.
No Japanese address, no monthly plan. That’s the key rule. If you’re still at a hotel or guesthouse, get your residence card and address registration first.
The 14-Day Activation Trap: What Happens If You Don’t Register Your SIM Card
Why Japan Requires Immediate Identification and Registration
Japan’s Telecommunications Business Act (電気通信事業法) requires carriers to verify the identity of every subscriber. For most monthly plans, this happens at the point of purchase — you hand over your Residence Card, it gets scanned, and you’re registered. But for certain prepaid and online-purchased plans, there’s a registration window after purchase. Miss it and your service cuts off.
Penalties for Missing the Registration Window
If you purchase a SIM that requires post-purchase identity registration and fail to complete it within the required window — typically 14 days — the carrier suspends the service. You won’t be charged, but you also won’t be connected. Getting the SIM reactivated after suspension usually means contacting customer support, re-submitting documents, and in some cases, the carrier simply cancels the account and you start over. That’s a serious problem if you’ve already given that number to your employer or landlord.
How to Avoid Service Suspension or Account Closure
Complete identity verification on the same day you receive the SIM. Do this immediately. If you ordered online, check the delivery package for a QR code or URL that leads to the registration portal — most providers include it in the box. Have your Residence Card ready to photograph. The verification upload usually takes under 10 minutes, and approval comes within a few hours. Don’t wait.
How to Get a Japan SIM Card Plan for Foreigners: Step-by-Step
Choosing Between NTT Docomo, SoftBank, and au
If you live or work outside a major city, Docomo’s network is the most reliable choice — it consistently outperforms the others in rural prefectures. In Tokyo, Osaka, or Nagoya, all three majors cover you well, so the decision comes down to price and which MVNO you want to use. IIJmio runs on Docomo and au. AEON Mobile runs on Docomo. Rakuten Mobile runs its own network, with au roaming as a backup. For foreigners on tight budgets, don’t go directly to Docomo or SoftBank’s flagship plans. Go to an MVNO instead. Same towers. Half the cost.
Where to Buy (Online, Electronics Stores, Airport Counters)
Online ordering through the provider’s website gives you the best prices and widest plan selection — your SIM arrives by post in 2–4 business days. You’ll need a Japanese mailing address and card. Electronics stores like Yodobashi Camera and Bic Camera let you walk out the same day. Staff can help with setup, though English support varies by location. Airport counters at Narita, Haneda, and Kansai offer tourist SIMs only. Convenient but limited plan options and higher prices than online. Convenience stores like 7-Eleven and FamilyMart stock prepaid top-up SIMs and tourist data SIMs — not suitable for monthly contracts.
Registration Process and What Happens After Purchase
For an in-store purchase: bring your Residence Card and credit or debit card. Staff scan your card, confirm your address, process payment, and hand you the SIM. Insert it, restart the phone, and you should have signal within minutes. APN settings may need to be configured manually — the carrier will give you a card or send a setup guide by email.
For online purchases: order through the provider’s website, receive the SIM by post, then complete identity verification through the provider’s online portal. Once approved, the SIM activates and you configure APN settings from the instructions included in the package.
Getting a SIM on a work visa is more complicated than it looks, but it is not impossible. Having a certificate of employment from your company makes a noticeable difference — carrier staff sometimes hesitate with foreign applicants, and that document moves things along.
Costs and Monthly Plans for Foreign Residents (Comparison Table)
Prices below are for SIM-only monthly plans targeted at residents. Tourist prepaid SIMs are priced separately.
| Provider | Network | Starting Price | Data Options | Calls Included? | Foreign Resident Friendly? |
|---|---|---|---|---|---|
| IIJmio | Docomo / au | ¥850/month (2GB) | 2GB–50GB | No (add-on: ¥220/month) | Yes — Residence Card accepted |
| AEON Mobile | Docomo | ¥858/month (1GB) | 1GB–20GB | No (add-on available) | Yes — can apply in-store at AEON |
| Rakuten Mobile | Rakuten / au | ¥1,078/month (3GB) | 3GB / 20GB / Unlimited | Free (via Rakuten Link app) | Yes — Residence Card required |
| NTT Docomo (direct) | Docomo | ¥2,970/month (4GB) | 4GB–Unlimited | Yes (30 seconds free) | Yes — but more documentation required |
| SoftBank (direct) | SoftBank | ¥2,178/month (3GB) | 3GB–Unlimited | Yes (5 minutes free) | Yes — Residence Card + Japanese bank |
| Holafly (tourist eSIM) | Multiple | ~¥4,000 (7 days) | Unlimited data | No | Tourists only — no contract |
Budget Plans, Mid-Range Options, and Unlimited Data
At the budget end, IIJmio’s 2GB plan at ¥850 is the cheapest legitimate monthly SIM plan available to foreign residents. It works well for light users who rely on Wi-Fi at home and work. AEON Mobile’s 1GB entry plan at ¥858 is nearly identical in price, but AEON’s real advantage is its in-store support at AEON malls across Japan — helpful if you prefer applying face-to-face rather than online.
Mid-range sits around ¥1,500–¥2,500 per month for 10–20GB. Rakuten Mobile’s unlimited plan at ¥3,278/month with free domestic calls through the Rakuten Link app is the best value at the upper end, provided you’re in an area with solid Rakuten coverage. International calls run ¥44 per minute on most prepaid plans; Rakuten Link offers lower international rates.
eSIM, Prepaid, and Alternative Options for Expats
Using eSIM Technology in Japan
eSIM support in Japan has expanded significantly since 2023. IIJmio, Rakuten Mobile, and Docomo all offer eSIM plans. The setup is entirely digital — you scan a QR code, download the carrier profile, and activate within minutes. No waiting for a physical SIM to arrive in the post. For expats with newer iPhones (iPhone XS or later) or newer Android flagship models, eSIM is worth checking before you order a physical card. One critical point: your phone must be carrier-unlocked. Phones purchased from major Japanese carriers are sometimes SIM-locked to that carrier for the first few months after purchase.
Prepaid SIM Cards vs. Monthly Contracts
Prepaid SIMs work without a monthly bill. You load credit, use it, reload when it runs out. They’re ideal for newcomers who haven’t yet set up a Japanese bank account or credit card. The downside is cost — prepaid data rates per gigabyte are significantly higher than monthly contract rates. Standard prepaid plans run ¥4,000–¥7,000 for a month of usable data, compared to ¥850–¥1,500 for an MVNO monthly plan covering the same usage. Once you have your Residence Card and a Japanese payment method, switching to a monthly MVNO plan will save you money almost immediately.
Budget Carriers Like IIJmio and AEON Mobile
IIJmio has been a go-to for foreign residents for years. It accepts Residence Cards without My Number for most plans, the English-language setup documentation is decent, and the network quality (running on Docomo and au) is reliable. The online application takes about 20 minutes if you have your documents ready. As modernlivingjapan.com notes in their SIM card guide for foreigners, IIJmio is often the first recommendation for budget-conscious expats on work visas.
AEON Mobile is worth considering specifically if you live near an AEON mall — which covers most mid-size Japanese cities. You can walk in, speak to staff, apply in person, and leave with a SIM the same day. The plans run on Docomo’s network. English-speaking staff availability varies by location, so check your local branch before making the trip.
Common Questions
Can foreigners get a SIM card in Japan without a work visa?
Yes. Tourist data SIMs are available with just a passport — no visa check involved. For monthly contract plans with a Japanese phone number, you need a Residence Card, which means you must be on a long-term visa (work, student, spouse, or permanent residency). Tourists cannot sign up for monthly MVNO plans.
What is the cheapest SIM card plan in Japan for foreigners?
IIJmio’s 2GB plan at ¥850 per month is the lowest-priced monthly plan available to foreign residents as of 2025. AEON Mobile’s 1GB plan at ¥858 is comparable. Both require a Residence Card and Japanese payment method. These prices do not include voice calls — that’s an add-on.
Does IIJmio accept foreign residents without My Number?
Most IIJmio plans accept a Residence Card as the primary identity document without requiring a My Number card. That said, IIJmio’s requirements can shift — check the current application page before applying. If your card shows a long-term visa status, you should clear the identity check without My Number.
Can I get a Docomo SIM card as a foreigner on a tourist visa?
Docomo’s monthly contract plans are not available to tourists — you need a Residence Card. Tourists can buy Docomo-network data SIMs through third-party providers at airports or electronics stores, but these are prepaid data SIMs, not Docomo contract accounts.
What documents do I need to set up AEON Mobile as a foreigner?
You’ll need your Residence Card (在留カード), a Japanese bank account or credit card for billing, and a Japanese mailing address. AEON Mobile runs on Docomo’s network and accepts applications in-store at AEON malls. Having your address registration (住民票 / Juminhyo) paperwork ready is helpful if any address verification is needed.
How much does a basic phone plan cost per month in Japan?
MVNO plans start at ¥850–¥1,000 per month for 1–2GB of data. Mid-range plans with 10–20GB run ¥1,500–¥2,500. Direct carrier plans (Docomo, SoftBank, au) start around ¥2,100–¥3,000 for entry-level tiers. Unlimited data plans from direct carriers run ¥7,000–¥9,000 per month.
Can I use eSIM in Japan if I’m a foreign resident?
Yes — IIJmio, Rakuten Mobile, and Docomo all offer eSIM options for residents. Your phone must be carrier-unlocked and eSIM-compatible. Setup is done digitally via QR code, and activation is usually complete within the same day. This works well if you’ve just arrived and don’t want to wait for a physical SIM to arrive by post.
What happens to my Japanese phone plan if I leave the country?
Your contract continues and monthly charges apply whether you’re in Japan or not. If you’re leaving permanently, cancel the contract before you leave — cancellation after departure requires contacting the carrier remotely, which can be complicated. Some carriers charge a cancellation fee of ¥1,000–¥3,000; MVNOs with no-contract plans typically don’t. Suspend rather than cancel if you’re returning within a few months.
Do I need a Japanese phone number before getting a SIM card?
No. When you sign up for a monthly SIM plan, you receive a new Japanese phone number as part of the activation. You don’t need an existing number. If you already have a Japanese number from a previous carrier and want to keep it, request a MNP (Mobile Number Portability / 番号ポータビリティ) code from your current carrier before switching.
Which phone plan is best for expats who travel frequently?
Rakuten Mobile’s unlimited plan at ¥3,278/month includes free international calls via the Rakuten Link app and no data throttling in Japan, which suits frequent travellers who need to stay connected. For those who travel to multiple countries, pairing a Japanese MVNO plan with a separate travel eSIM (like Holafly) is more
