Japan eSIM Complete Guide:
Connect before you land.
By 2026, physical SIM cards are becoming obsolete for travelers. This guide explains exactly what an eSIM is, how to check if your phone works, and which plan to choose for your trip.
General guidance only — entry requirements change frequently. Verify with official Japanese government sources before traveling.
1. What is an eSIM?
An eSIM (embedded SIM) is a digital SIM built into your phone. Instead of swapping physical plastic cards, you simply download a profile via a QR code.
Dual-SIM Ready
Keep your home SIM active for 2FA texts while using Japan data.
Instant Delivery
Receive your QR code via email instantly—no airport lines.
2. CRITICAL: Will it work?
Before buying, you must confirm two things:
A. Device is "Unlocked"
If your phone is on a payment plan with a carrier (AT&T, Verizon, etc.), it might be locked.
Check: Settings > General > About > Carrier Lock (iPhone).
B. Hardware Support
Most phones since 2020 support eSIM.
Check: Dial *#06# on your phone. If you see an "EID" number, you are eSIM compatible.
3. What about phone calls?
90% of travel eSIMs are Data-Only. They do not come with a +81 phone number.
Need to call a restaurant/hotel?
Use Skype Out or Viber Out. You can load $5 of credit and call any Japanese landline for cents per minute.
Need a real +81 number?
Most tourists don't need this. If you do (e.g., for concert tickets), you must choose Mobal and undergo identity verification (required by Japanese law).
4. Which eSIM should I choose?
Airalo (Moshi Moshi)
Best for: Budget & Ease
The world's most popular eSIM app. Install in 60 seconds and top up as you go. Perfect for short trips and budget-conscious travelers.
Get Airalo →Sakura Mobile
Best for: Performance & Support
Uses the premium Docomo network (best coverage in rural areas). Offers full English support—crucial if you encounter setup issues.
Get Sakura Mobile →Mobal
Best for: Voice + Data
The only choice if you need a real Japanese phone number for calls and SMS. Note: Requires passport upload for ID verification.
Get Mobal SIM/eSIM →How to set up (The Pro Way)
Buy 2 days before
Receive your QR code early. Don't wait until you land.
Install on the plane
Most eSIMs can be installed using airport/airplane Wi-Fi. It won't activate until it hits a Japan tower.
Enable Data Roaming
For the eSIM line only! This is required for many travel eSIMs to function.
Toggle & Test
Once you land, turn off your main line and set "Cellular Data" to your Japan eSIM.