Getting a Phone & SIM Card in Japan: Best Options for Foreigners

Your Options for Getting a Japan SIM Card as a Foreigner

Sorting out your phone plan is one of the first things you should do after arriving in Japan — and for good reason. Without a working japan sim card foreigner-friendly option, navigating train systems, finding your apartment, and staying in touch with people back home becomes genuinely stressful.

The good news? There are more options than ever before, and you don't need to speak Japanese to get connected. Here's a clear breakdown of everything you need to know.

Major Carriers (Docomo, SoftBank, au)

Japan's three big carriers — NTT Docomo, SoftBank, and au (KDDI) — offer the best network coverage and unlimited data plans. However, they come with higher price tags, often starting around ¥3,000–¥7,000/month, and the signup process can be more complex for foreigners.

Each of the big three now has a budget sub-brand: ahamo (Docomo), LINEMO (SoftBank), and povo (au). These are app-based, often available in English, and significantly cheaper — making them a smart middle ground.

MVNOs (格安SIM / Kakuyasu SIM)

MVNOs (Mobile Virtual Network Operators) are companies that rent bandwidth from the big carriers and resell it at lower prices. Popular options include IIJmio, OCN Mobile ONE, mineo, and NUROmobile.

These are often called "kakuyasu SIM" (cheap SIM) in Japan. Speeds can slow down during peak hours, but for most daily use — maps, messaging, social media — they're more than adequate.

eSIM

eSIMs are a game-changer for expats and short-term visitors. Services like Airalo, Ubigi, and IIJmio now offer eSIM plans you can activate before you even land in Japan. No physical SIM card, no post office trip — just scan a QR code and you're online.

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Best Budget SIM Plans for Japan Expats Under ¥2,000/Month

You really don't need to spend a lot to stay connected in Tokyo. Here are some of the best value plans available right now:

• IIJmio (2GB plan): From ¥850/month — one of the cheapest options. Runs on Docomo and au networks. English support available online.
• mineo (1GB plan): From ¥990/month. Known for excellent customer service and a flexible data-sharing community feature called "フリータンク" (Free Tank).
• povo 2.0 (au): Base plan is ¥0/month, and you top up data as needed (e.g., 1GB for ¥390). Perfect if your data usage varies month to month.
• LINEMO (3GB plan): ¥990/month with unlimited LINE usage — great if you use LINE to stay in touch with friends and family.
• OCN Mobile ONE (3GB plan): Around ¥990/month, runs on Docomo's network, solid speeds.

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Do You Need a Japanese Phone Number?

Short answer: yes, if you're staying longer than a few weeks. A Japanese phone number is required for many everyday services — signing up for bank accounts, using certain delivery apps, registering at a hospital, and even setting up a Suica card account.

If you only have a data SIM (no voice calls), some services will accept your home country number for SMS verification. But over time, you'll find it increasingly inconvenient. Most expats recommend getting a voice+data plan from day one.

A Japanese phone number isn't just for calls — it's a key that unlocks banking, deliveries, healthcare, and everyday life in Tokyo.

For residents staying in Tokyo long-term, a plan with a Japanese number from IIJmio, mineo, or one of the sub-brands (ahamo, LINEMO, povo) is the sweet spot between cost and functionality.

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How to Sign Up: Documents You'll Need

The signup process in Japan is more straightforward than people expect — especially if you go with an MVNO or sub-brand carrier. Here's what you'll typically need:

1. Residence Card (在留カード / Zairyū Kādo): This is the essential document. It is issued at the port of entry (airport) for most visa statuses, and you must register it at your local ward office (区役所). Without it, most monthly plan signups are not possible.
2. Passport: Required for identity verification alongside your residence card.
3. Japanese bank account or credit card: Most plans require a Japanese payment method. Some providers (like IIJmio) accept foreign credit cards — worth checking before you apply.
4. Email address: For your account registration and documents.

If you haven't received your Residence Card yet — which can happen in the first few days after arrival — a tourist SIM or short-term eSIM is your best stopgap.

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Pocket WiFi vs SIM Card: Short-Term Options

If you've just arrived in Japan and haven't sorted your Residence Card yet, or if you're here for a short stay, you have two main options: a pocket WiFi router or a short-term tourist SIM.

Pocket WiFi (Mobile WiFi Router)

Pocket WiFi devices are small portable routers that connect multiple devices to 4G/5G data. You can rent them at Narita and Haneda airports from companies like Global Advanced Communications (GAC), Ninja WiFi, or Japan Wireless. Prices run from around ¥250–¥600/day, depending on the data allowance.

The downside: you're carrying an extra device that needs charging, and you'll need to remember to return it on time. Good for short visits of 1–3 weeks.

Tourist SIM Cards

Tourist SIMs are available at airports and major electronics stores like Yodobashi Camera and Bic Camera. These typically offer data only (no voice calls) for set periods — 7 days, 15 days, or 30 days. Popular options include:

• IIJmio Tourist SIM: 15GB for 15 days (¥3,300)
• Docomo Data SIM: Available at airports, various plans from ¥3,000
• Airalo eSIM: Japan packages from around ¥700 for 1GB — activate before you land

Which Should You Choose?

For stays under two weeks, a tourist SIM or eSIM is usually the better choice — no extra device, no return hassle. For longer stays, jump to a monthly MVNO plan as soon as you have your Residence Card.

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Recommended Plans by Use Case

Everyone's situation is different. Here's a quick guide to the best mobile plan based on how you'll actually use it:

Just Arrived, No Residence Card Yet

→ Airalo eSIM or IIJmio Tourist SIM. Get connected at the airport, handle your admin, then upgrade once you're registered.

Budget-Conscious Expat, Light Data User

→ IIJmio 2GB plan (¥850/month) or povo 2.0 (pay-as-you-go). Keep costs minimal while you get settled. Perfect if you're mostly on WiFi at home — like in a sharehouse with included internet.

Remote Worker Who Needs Reliable Data

→ ahamo (Docomo) 20GB plan at ¥2,970/month. Full Docomo network quality, 20GB data, and the app is available in English. A strong choice if you work from cafes and need dependable speeds.

Heavy Social Media User or Streamer

→ LINEMO Smart Plan (20GB) at ¥2,728/month or SoftBank's unlimited plans starting around ¥4,000/month. More data, reliable speeds, and LINE traffic doesn't count against your cap.

Short-Term Stay (1–3 Months)

→ mineo 3GB (¥1,518/month, no contract lock-in) or a Docomo tourist SIM. Look for no-contract plans so you're not locked in.

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Getting Connected in Tokyo: Final Thoughts

Getting your phone sorted quickly makes everything else easier — finding your way around, communicating with landlords, setting up a bank account, and just feeling at home. The best mobile japan english-friendly options right now are IIJmio, LINEMO, ahamo, and povo, depending on your budget and data needs.

Don't overthink it. Start with a tourist SIM or eSIM when you land, then switch to a monthly MVNO plan once you have your Residence Card and a Japanese bank account set up.

At Modern Living Tokyo, our furnished apartments and sharehouses come with high-speed WiFi already included, so you won't be scrambling for data on day one. That gives you a little breathing room to compare plans, visit a store, and choose the right SIM for your lifestyle — without the stress.

Have questions about getting set up in Tokyo? Feel free to reach out to our team — we're happy to help new residents navigate the practical side of life in Japan.