The 3 Best eSIM & SIM Card Options for Traveling in Japan (2025)
If you’re planning to travel to Japan, having reliable esim is a game-changer.
From using Google Maps to navigating the subway, translating signs, or uploading your sushi photos to Instagram, a working SIM or eSIM can make your trip smoother, safer, and more fun.
Here are three of the best options for mobile connectivity in Japan – whether you’re staying for a week or a month.
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Top 3 SIM for Japan travel
1. Airalo – Instant eSIM Access from Anywhere
Type: eSIM
Price Range: ~$4.5 for 1GB (7 days)
Activation: Instant (via app)
Coverage: Japan-only or Asia-wide plans available
Why I Like It:
・Super easy to use – buy, install, and activate in minutes
・No need to visit a store or wait in line
・Works great for short-term travelers
Perfect for: Travelers arriving in Japan without a local SIM and who want internet as soon as they land.
Pro tip: Download the Airalo app before your trip so you can install your eSIM on Wi-Fi. It’s easiest one I have used before. Download+Buy. That’s it.
Link:https://airalo.pxf.io/RENTALJP15
(For New user. You can use 15% discount with this link!)
Link:https://airalo.pxf.io/RENTALJP10
(For everyone. You can use 10% discount with this link!)
2. Ubigi – High-Speed eSIM with Great Coverage
Type: eSIM
Price Range: ~$8 for 3GB (30 days)
Network: Uses SoftBank or NTT Docomo networks
Why We Like It:
・Fast and stable connection, even in rural areas
・Great for digital nomads or longer stays
・Also works on tablets and laptops with eSIM capability
Perfect for: Travelers who need more than just a few gigabytes and want consistent performance across the country.
Pro Tips: Ubigi on a trip- no signal issues, even in the middle of nowhere. If you’re heading into the mountains like Mt.Fuji or off the grid, this one’s solid.
Link:https://go.ubigi.com/Qje0vY
Coupon code:RENTALJP10
(For New users:You can use 10% discount with this code)
3. Mobal – Physical SIM with Voice + SMS
Type: Physical SIM card
Price Range: ~¥3,990 for 7GB (30 days, data + voice)
Activation: Available for pickup at major airports or delivered to hotel
Why I Like It:Comes with a real Japanese phone numberGood for receiving SMS (e.g. for banking or reservations)Long-term or working holiday travelers will appreciate the voice + data combo
Perfect for: Anyone staying in Japan longer than a couple weeks, or who needs a local phone number for business or residency purposes.
Pro tip:Planning to stay in Japan for over a month？
Mobal’s a great pick—it gives you a real Japanese phone number for stuff like LINE or booking restaurants.
If you’re sticking around, this one’s for you.
eSIM link: https://www.mobal.com/japan-esims/?source=3557
SIM link: https://www.mobal.com/japan-sim-card/?source=3557
(You can use 20% discount with this link. The coupon is already applied to this link)
Recommended Option by Length of Stay
| Stay Duration | Best Option | Why |
|---|---|---|
| 1–3 days | Airalo | Instant eSIM activation, low-cost plans |
| 4–7 days | Airalo or Ubigi | Both offer short-term data plans with easy setup |
| 1–2 weeks | Ubigi | More generous data packages, stable network |
| 3–4 weeks | Mobal | Includes voice + SMS, good for longer stays |
| 1 month or more | Mobal | Physical SIM with Japanese phone number, ideal for work, study, or residence |
This table makes it easy to choose based on your itinerary.
Pro tip: Even for short trips, an eSIM like Airalo is often more convenient than airport Wi-Fi or rental routers.
Which Option is Right for You?
| Feature | eSIM | Physical SIM |
|---|---|---|
| Easy activation | ✅ | ⚠️ (pickup required) |
| Voice calls | ❌ (usually data only) | ✅ |
| Compatible with older phones | ❌ | ✅ |
| Best for short trips | ✅ | ✅ |
| Best for long stays | ⚠️ | ✅ |
| Airalo | ✅ | ❌ |
| Ubigi | ✅ | ❌ |
| Mobal | ✅ | ✅ |
Final Thoughts
Japan is one of the safest and most fascinating countries to explore, but having internet access makes everything easier – from checking train times to finding the best ramen nearby.
Whether you prefer the convenience of an eSIM or need a physical SIM with a phone number, these three options are trusted by travelers and easy to set up.
Stay connected and enjoy your adventure!
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