How to Get a SIM Card or Phone Plan in Japan as a Foreigner

Moving to Japan or staying long-term? One of the first things you need to sort out is your phone situation. Whether you need mobile data to navigate the trains, a phone number for signing up to services, or a way to stay connected with friends back home, getting the right SIM card or phone plan makes a huge difference in your daily life.

The good news is that getting connected in Japan has become much easier for foreigners in recent years. From prepaid data-only SIMs to full contract plans with major carriers, there are plenty of options to fit your needs and budget. This guide walks you through everything you need to know in 2026.

Understanding Your Options: Prepaid SIM vs. Contract Plan vs. eSIM

Before diving into specific providers, it helps to understand the three main categories of mobile connectivity in Japan:

Prepaid Data-Only SIM Cards

These are the easiest option if you just need internet access. Prepaid SIMs are available at airports, electronics stores like Bic Camera and Yodobashi Camera, and even convenience stores like Lawson, FamilyMart, and 7-Eleven. They typically come with a fixed data allowance (1GB to 50GB+) and validity period (8 to 31 days or longer). Prices range from about 3,000 to 5,000 yen for standard packages.

The catch? Most prepaid SIMs are data-only, meaning you cannot make phone calls or send SMS. This is fine for tourists but can be limiting for residents who need a phone number for opening a bank account, signing up for services, or receiving verification codes.

Contract Phone Plans (Postpaid)

If you are living in Japan and need a phone number, a contract plan with a carrier is the way to go. Japan has three major carriers:

• NTT Docomo – The largest network with the best nationwide coverage
• au (KDDI) – Strong coverage, especially in rural areas
• SoftBank – Good urban coverage, often has foreigner-friendly support

Major carrier plans typically cost between 5,000 and 10,000 yen per month for data + voice. However, all three carriers now offer budget sub-brands:

• ahamo (Docomo) – 20GB for 2,970 yen/month
• povo (au) – Base plan is 0 yen; buy data as you need it
• LINEMO (SoftBank) – 3GB for 990 yen/month or 20GB for 2,728 yen/month

eSIM

If your phone supports eSIM (most newer iPhones and Android flagships do), this is often the fastest and most convenient option. You can purchase and activate an eSIM online before you even arrive in Japan. Providers like Ubigi, Airalo, Saily, and the carriers’ own eSIM options let you scan a QR code and get connected instantly. No physical SIM card swapping needed.

MVNOs (Budget Carriers)

MVNOs (Mobile Virtual Network Operators) use the major carriers’ networks but offer significantly cheaper plans. Popular MVNOs for foreigners include:

• IIJmio – Plans from 850 yen/month (2GB)
• Mineo – Flexible plans with data sharing features
• LINE MOBILE – Popular for its LINE integration (free LINE data usage)
• Rakuten Mobile – Technically a fourth carrier now, with plans starting at 1,078 yen/month (up to 3GB) and unlimited data for 3,278 yen/month

What Documents Do You Need?

The documents you need depend on the type of SIM or plan you are signing up for:

For Prepaid Data-Only SIMs

Usually just your passport. Some may not even require ID. These are available to tourists and residents alike.

For Contract Plans (Postpaid) and MVNOs with Phone Numbers

You will typically need:

• Residence Card (Zairyu Card) – This is the most important document. You need to be a registered resident of Japan.
• Japanese bank account or credit card – For monthly payments. Some carriers accept foreign credit cards, but a Japanese payment method is more reliable. Check our guide on opening a bank account in Japan.
• My Number Card (in some cases) – Increasingly requested for identity verification.
• Passport – As supplementary ID.

Note: If you have just arrived and do not yet have a residence card or proper visa, you will be limited to prepaid or eSIM options until your paperwork is sorted.

Where to Buy a SIM Card in Japan

At the Airport

Major international airports (Narita, Haneda, Kansai, Chubu Centrair) have SIM card counters and vending machines in the arrivals area. This is the most convenient option if you need connectivity immediately, though prices tend to be slightly higher than other locations. NINJA WiFi and other services offer pickup lockers where you can pre-order online and collect your SIM in seconds.

Electronics Stores

Bic Camera, Yodobashi Camera, and Sofmap carry a wide range of SIM cards and can help you sign up for contract plans. Staff at major locations often speak some English. These stores are found in most major cities, usually near train stations.

Carrier Shops

Docomo, au, and SoftBank all have dedicated shops throughout Japan. Visit these if you want a full contract plan with a phone number. Wait times can be long, and staff may have limited English, so consider bringing a Japanese-speaking friend or using a translation app.

Online

Many MVNOs and eSIM providers operate primarily online. This is often the cheapest option and most language-friendly, as many websites offer English interfaces. Rakuten Mobile, IIJmio, and ahamo all have English-language sign-up processes.

Step-by-Step: Getting a Contract Phone Plan

1. Choose your carrier or MVNO based on your budget and data needs.
2. Gather your documents: Residence Card, bank account/credit card info, passport.
3. Visit a carrier shop or sign up online. If going in person, arrive early as wait times can exceed an hour.
4. Select your plan. Most carriers will try to upsell you on extras – feel free to decline optional services.
5. Choose a phone number or port your existing number (MNP transfer).
6. Complete payment setup – usually auto-debit from your bank account or credit card.
7. Receive your SIM card (or activate eSIM) and start using your new plan.

The whole process typically takes 30-60 minutes in-store, or a few days if ordering online (SIM card ships by mail).

Practical Tips for Choosing the Right Plan

1. Start with a prepaid or eSIM on arrival, then switch to a contract plan later. Do not rush into a 2-year contract your first week. Get settled, open a bank account, and then make an informed decision.
2. Consider how much data you actually need. With free Wi-Fi available at most cafes, train stations, and convenience stores, you might use less data than you think. Many people do fine with 3-5GB per month.
3. Budget carriers are just as good for most people. MVNOs like IIJmio and Rakuten Mobile use the same networks as the big three but cost a fraction of the price. Speeds may slow slightly during peak hours, but it is barely noticeable for typical usage.
4. Check contract cancellation terms. Japan has improved consumer protections, and most carriers no longer charge early termination fees. But read the fine print, especially for plans that include a subsidized phone.
5. Use LINE for calls. Almost everyone in Japan uses LINE for messaging and voice/video calls. Even if you have a data-only SIM, you can make free calls over LINE. This is one reason many foreigners opt for cheaper data-heavy plans instead of expensive voice plans.

FAQ

Can I get a phone plan in Japan without a residence card?

For prepaid data-only SIMs and eSIMs, you usually just need a passport. However, contract plans with a phone number almost always require a residence card (Zairyu Card). If you are on a tourist visa, you are limited to prepaid options.

Do Japanese phone plans work with my unlocked phone from home?

Yes, as long as your phone is unlocked and supports the frequency bands used in Japan. Most modern smartphones from major brands (Apple, Samsung, Google Pixel) work fine. Check your phone’s specs for bands like Band 1 (2100MHz), Band 3 (1800MHz), and Band 19 (800MHz) for the best compatibility.

How long does it take to get a SIM card?

Prepaid SIMs can be purchased and activated in minutes at the airport or an electronics store. Contract plans take 30-60 minutes in-store. Online sign-ups may take 2-5 days for the SIM to arrive by mail, though eSIM activation is instant.

Can I keep my phone number if I switch carriers?

Yes, Japan supports MNP (Mobile Number Portability). You can transfer your phone number from one carrier to another. Request an MNP reservation number from your current carrier, then provide it when signing up with the new one.

What is the cheapest way to have a phone number in Japan?

Rakuten Mobile offers plans starting at 1,078 yen/month (up to 3GB with a phone number), and povo 2.0 from au has a base plan of 0 yen/month (you pay only for data toppings as needed). These are excellent options if you want a local phone number without spending much. For even cheaper data-only connectivity, IIJmio starts at 850 yen/month.

Get Connected with the Expat Community

Getting your phone set up is just one piece of settling into life in Japan. If you are looking for advice from people who have been through it all – or just want to make friends in a new country – check out our guide to finding expat communities in Japan or browse upcoming international exchange events where you can meet fellow foreigners and locals in a welcoming environment.

If you are still in the early stages of your move, you might also find our guides on finding an apartment in Japan and health insurance for foreigners helpful as you get settled.