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.

📱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

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?

💡 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!