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How It Works
Get connected in Japan in three simple steps
1
Compare Plans
Filter listings by trip length, data needs, budget, and available network details.
2
Confirm with the Seller
Check the final price, activation policy, fair-use terms, and refund policy before purchase.
3
Install & Connect
Follow the seller's installation instructions and activate the eSIM according to the plan terms.
Explore Japan with Confidence
Reliable coverage from Tokyo to Hokkaido.
Tokyo
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Kyoto
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Hokkaido
Osaka
Common Questions
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM that allows you to activate a cellular plan without using a physical SIM card. You can download an eSIM plan directly to your phone before or during your trip to Japan.Read the full guide →
Which phones support eSIM?
Most modern smartphones support eSIM, including iPhone XS and later, Google Pixel 3 and later, Samsung Galaxy S20 and later, and many more. Check your phone's Settings > Cellular/Mobile to confirm eSIM support.
Can I keep my regular phone number while using an eSIM?
Yes. Most phones support dual SIM (your regular SIM + an eSIM). You can keep your home number for calls/texts while using the eSIM for data in Japan.
How do I install an eSIM?
Installation methods vary by seller and device. Follow the seller's QR code, app, direct-install, or manual setup instructions, and check when plan validity begins.Step-by-step setup guide →
How much data do I need for a Japan trip?
As a planning estimate, 1-3GB can cover light use and 3-5GB can cover moderate use for about a week. Video, backups, updates, and tethering can require substantially more.Calculate your data needs →
Which mobile networks work in Japan?
Japan's major mobile networks include NTT Docomo, KDDI au, and SoftBank. Coverage varies by location and plan, so check the underlying carrier and its official coverage map.Coverage comparison →
Does eSIM work on the Shinkansen (bullet train)?
An eSIM can work on Shinkansen routes, but signal quality varies by route, tunnel, congestion, device, and underlying carrier. Do not rely on uninterrupted service for the entire journey.Shinkansen connectivity guide →
Can I top up or extend my eSIM plan?
Many providers like Airalo, Ubigi, and Nomad support top-ups through their app. Check if your plan supports top-up before purchasing — it's useful if you run out of data during your trip.
Still have questions?
Browse our guides or compare plans to find exactly what you need.