Best SIM Card in Japan for Foreigners (2026): The Only Guide You Need — From Airport to Long-Term Plan

Best SIM Card in Japan for Foreigners (2026): The Only Guide You Need — From Airport to Long-Term Plan
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Best SIM Card in Japan for Foreigners (2026): The Only Guide You Need — From Airport to Long-Term Plan

Updated September 2026  |  Japan Figured Out Editorial Team
Getting a Japanese phone number isn't optional — it's essential.

Banks require it for SMS verification. Delivery services need it. Doctors' offices, landlords, employers — everyone in Japan expects a local number. And a data-only tourist SIM won't cut it for any of these.

This guide tells you exactly what to get at each stage: what to buy at the airport, what to switch to once you're settled, and which carriers are actually foreigner-friendly in 2026.

πŸ“± Why You Need a Japanese Phone Number (Not Just Data)

Many foreigners arrive with a data-only eSIM or tourist SIM and assume that's enough. It isn't:

  • Bank account setup: Every Japanese bank sends SMS verification codes to a Japanese number. A tourist SIM or data-only eSIM cannot receive these.
  • Delivery services: Amazon Japan, food delivery, and courier services contact you by Japanese number
  • Apartment rental: Landlords and management companies require a local contact number
  • Employer: Many employers require a Japanese number before your first day
  • Government services: City hall notifications, My Number-related communications
πŸ’‘ Keep your home number too. Your contacts abroad can still reach you via WhatsApp, LINE, or iMessage — these work fine on any data connection and don't require a Japanese number.

πŸ—Ί️ Which SIM Is Right for You? — Quick Guide by Situation

SituationBest Option
Tourist / short visit (under 3 months)Prepaid airport SIM or eSIM (data only)
Just arrived, need data + number immediatelyMobal or Sakura Mobile (no residency needed)
Resident, want cheapest optionIIJmio (from ¥850/month)
Resident, want unlimited dataRakuten Mobile (¥3,278/month unlimited)
Resident, want best rural coverageahamo (¥2,970/month, Docomo network)
Need English customer supportRakuten Mobile or Sakura Mobile
No Japanese credit card or bank yetMobal (accepts PayPal, Alipay, foreign cards)

✈️ Step 1: What to Get at the Airport (First Days in Japan)

Before you have a Residence Card or registered address, your options are limited to prepaid SIMs and eSIMs — but these are perfectly fine for your first few weeks.

Option A: Airport Prepaid SIM (Data Only)

Available immediately at Narita, Haneda, Kansai (Osaka), and other major airports. No address or Residence Card needed — just your passport.

  • Best for: Getting online immediately on arrival
  • Providers: IIJ Tourist SIM, B-Mobile, JAPAN TRAVEL SIM, SoftBank
  • Price: ¥1,500–¥4,000 for 7–30 days of data
  • Downside: Data only — no Japanese phone number, cannot receive SMS from banks

Option B: eSIM (Activate Before Landing)

If your phone supports eSIM (iPhone XS and later, most Android phones after 2019), you can activate a Japanese eSIM before your flight even lands.

  • Providers: IIJmio Tourist, Airalo, TORA
  • Compatible phones: iPhone XS+, most flagship Androids after 2019
  • Price: ¥1,500–¥3,500 for 7–30 days
  • Downside: Data only — no Japanese phone number
πŸ’‘ Make sure your phone is unlocked. A locked phone (tied to your home carrier) will not accept a Japanese SIM. Check with your carrier before leaving home — unlocking is usually free.

Option C: Mobal — Get a Japanese Number Before Arriving

Mobal is a foreigner-focused SIM that you can order online before arriving in Japan. It gives you a real Japanese voice number — not just data — from day one.

  • No Residence Card required to sign up
  • Accepts foreign credit cards, PayPal, and Alipay
  • English customer support
  • Plans: 1GB–30GB from ¥1,650–¥4,378/month
  • Runs on SoftBank's network
  • Best for: People who need a Japanese number before getting a Residence Card — for employer or bank requirements

πŸ“‹ What You Need for a Long-Term Resident Plan

Once you have your Residence Card and registered address, you can get a proper monthly contract — significantly cheaper than tourist SIMs.

Required documents:

  • Residence Card (εœ¨η•™γ‚«γƒΌγƒ‰) — must have your current address registered on the back
  • Passport
  • Payment method — Japanese credit card, Japanese bank debit card, or foreign Visa/Mastercard (accepted by some providers)
⚠️ Your address must be registered on your Residence Card first. Go to city hall and register your address before applying for a SIM contract. Carriers verify this during application.

πŸ† Best Long-Term Plans for Foreigners in 2026

1. Rakuten Mobile — Best Overall for English Speakers

¥3,278/month — unlimited data, unlimited domestic calls

  • Japan's only truly unlimited data plan — no caps, no throttling
  • Free unlimited domestic calls via Rakuten Link app
  • Full English app — signup, account management, support all in English
  • eSIM available — same-day activation
  • No cancellation fee
  • Downside: Weaker signal in rural areas (uses au network for roaming outside Rakuten coverage)
  • Best for: Heavy data users in cities, people who want English support, those already using Rakuten services

2. IIJmio — Best Budget Option

From ¥850/month (2GB) — runs on Docomo or au network

  • Cheapest reliable option in Japan
  • Runs on Docomo or au networks — excellent coverage
  • eSIM available
  • No cancellation fee
  • Downside: Japanese-only customer support; no free voice calls
  • Best for: Light data users who want to minimize costs

3. ahamo — Best for Rural Coverage and Frequent Travelers

¥2,970/month — 30GB — Docomo network

  • Runs on NTT Docomo's network — Japan's best nationwide coverage, including rural areas
  • Includes free global roaming data in 82 countries (30GB)
  • Includes 5 minutes of free domestic calls per month
  • Simple English-friendly online interface
  • No cancellation fee
  • Downside: Japanese-only customer support; 30GB cap (not unlimited)
  • Best for: People who travel outside major cities or frequently go home

4. povo2.0 — Best Pay-As-You-Go Option

Base plan ¥0/month — pay for data add-ons as needed

  • Base plan is free — pay only for the data you actually use
  • Runs on au's network
  • Great if your data usage varies month to month
  • Downside: No data without top-ups; Japanese-only interface
  • Best for: Light users or people who want a cheap backup SIM

5. Sakura Mobile — Best for Foreigners Who Need English Help

Various plans — English-first service

  • Built specifically for foreigners — English support throughout
  • Accepts foreign credit cards
  • Can be ordered before arriving in Japan
  • Downside: More expensive than IIJmio or povo for equivalent data
  • Best for: People who want hand-held English support for setup

πŸ“Š Plan Comparison at a Glance (September 2026)

CarrierPriceDataNetworkEnglish?Best For
Rakuten Mobile¥3,278/moUnlimitedRakuten + auFullHeavy users, English needed
IIJmioFrom ¥850/mo2GB–50GBDocomo/auLimitedBudget, light users
ahamo¥2,970/mo30GBDocomoPartialRural, frequent travelers
povo2.0¥0 baseAdd-onsauLimitedVariable usage, backup SIM
MobalFrom ¥1,650/mo1GB–30GBSoftBankFullNo Residence Card yet

πŸ“² How to Sign Up for Rakuten Mobile (Step-by-Step)

  1. Make sure your phone is unlocked — contact your home carrier if unsure
  2. Go to Rakuten Mobile's website or app — switch to English in the top menu
  3. Choose SIM card or eSIM — eSIM activates instantly; physical SIM arrives by mail in 2–3 days
  4. Upload your Residence Card — front and back, clear photo on a plain background
  5. Enter your registered Japanese address — must match your Residence Card exactly
  6. Add payment method — Japanese bank card or credit card
  7. Complete identity verification — take a selfie in the app
  8. Activate your SIM or eSIM — eSIM: scan the QR code. Physical SIM: insert when it arrives.
πŸ’‘ eSIM tip: You need Wi-Fi to download the eSIM profile. Hotel Wi-Fi or a borrowed hotspot works fine. Once downloaded, you don't need Wi-Fi anymore.

❌ Common Mistakes to Avoid

  • Getting a data-only SIM and wondering why banks reject you — you need a voice line for SMS verification
  • Signing up with an unregistered address — register at city hall first; carriers verify your Residence Card address
  • Signing a 2-year contract — most good plans are now month-to-month with no cancellation fee. Always check before signing.
  • Using a locked phone — a locked phone won't accept a Japanese SIM. Unlock before arriving.
  • Roaming on your home carrier — extremely expensive. Switch to a local plan as soon as possible.
  • Not canceling when leaving Japan — most plans keep charging even when you're abroad. Cancel online (most allow English cancellation) if you're leaving for more than a month.
  • Choosing ahamo expecting English support — ahamo's interface is partially English-friendly but customer support is Japanese only. For full English support, use Rakuten Mobile or Sakura Mobile.

✅ Quick Summary

StageWhat to Get
Before arriving / no Residence CardMobal or airport prepaid SIM
Tourists and short staysAirport prepaid SIM or eSIM (data only)
New resident, want cheapest planIIJmio (from ¥850/month)
New resident, want unlimited + EnglishRakuten Mobile (¥3,278/month)
Need best coverage everywhere in Japanahamo (¥2,970/month, Docomo network)
Usage varies month to monthpovo2.0 (base ¥0 + add-ons)

Getting connected in Japan has never been easier for foreigners than it is in 2026. Start with Mobal or an airport SIM to survive your first days, then switch to Rakuten Mobile or IIJmio once you have your Residence Card. Get that Japanese number sorted early — everything else in Japan depends on it.

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