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Buy in your browser. Your eSIM lands in your inbox, and your phone does the rest.
How it worksJapan eSIM
Install before you travel. Your data starts when you first connect in Japan.
Choose your plan.
Before you buy, just confirm your device is eSIM-compatible and network-unlocked.
Plan details
- Connects on 3G, 4G and 5G where the local network has it
- Hotspot and tethering on plans that support it, where the local network allows
- Keep your own number, data only (no calls or texts)
- Activates on first connection, not at purchase
- Top up any time while your plan is running
Need broader coverage?
Regional and Global eSIMs cover Japan and plenty more.
Install before you travel. Your data starts when you first connect in Japan.
Across Japan, you're in good hands. Off to Japan? You're in good hands.
Four things we'll tell you before you pay, not after.
You’ll know your network
200+ networks. Named on every plan. Connected via trusted networks in 195+ destinations.
Explore networks
Unlimited, explained.
A daily full-speed allowance. Then 1 Mbps for the rest of the day. Your full-speed data resets the next day.
Unlimited explained
Emailed within minutes
Buy at the gate if you have to. Install now, ready when you land.
When to install 1 / 4
Networks vary by destination and are listed on each plan. All trade marks are the property of their respective owners. Halo is not affiliated with these operators.
Before you go.
Staying connected in Japan
Planning a Tokyo city break or a longer route through Kyoto and Osaka? Set up your travel data before departure, while you have time and Wi-Fi to follow the installation instructions. Save your first hotel address in Japanese, your transfer details and any ticket confirmations on your phone so you can find them without a connection. For rail journeys, keep the station names and booking references handy rather than relying on a live page loading at the platform. Mobile reception can change along a route, especially inside buildings or tunnels; a plan is not a promise of continuous coverage. Check the networks and speed policy for the plan you select above. Once you arrive, choose your Halo eSIM for mobile data and enable roaming for that eSIM. Keep your home SIM’s data roaming off.
How much data you'll need
Start with your phone’s recent mobile-data usage, then adjust for your trip length and plans for video calls, streaming, uploads or hotspot use. Save large downloads for Wi-Fi when available. Fixed data is one allowance for the whole plan; for daily unlimited, check the daily full-speed allowance and what happens after it is used.
5G
Check the networks and speed policy for your selected Japan plan. A 5G connection also depends on your phone and local coverage; it is not guaranteed at every stop.
Which plan type suits my trip?
What else should I know?
Select a plan below to check its networks and speed policy in Plan details. Hotspot availability depends on the plan and the local network.
How do I set up my eSIM?
- Check your phone.
It needs to be eSIM-compatible and network-unlocked.
- Install before you fly.
Install on Wi-Fi before you leave. Follow the instructions in your delivery email. See the iPhone or Android setup guide.
- Connect when you arrive.
Select your Halo eSIM for mobile data and turn on data roaming for that eSIM. Your plan starts on its first connection at the destination.
Keep data roaming off on your home SIM to avoid using its roaming data. Need a hand? Chat with Hal.
Updated September 2026
Questions? We've got answers.
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Will I stay connected throughout a train journey in Japan?
Continuous reception is not guaranteed on trains or underground. Save ticket confirmations, station names and accommodation details before you travel, and check the networks listed for your selected plan.
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Can I install my Japan eSIM before flying?
Yes. Install on Wi-Fi before you leave and follow the delivery email instructions. The plan starts when your eSIM first connects at the destination, rather than when you install it.
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Can I call and send SMS on my Japan eSIM?
Halo eSIMs are exclusively data-only eSIMs. While you can engage in voice calls and messaging through WhatsApp, Facetime, and other widely used VOIP apps, traditional phone calls and SMS are not supported.
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Is my device compatible with this Japan eSIM?
Most phones from 2018 onwards support eSIM, including iPhone XR and XS and newer, Pixel 3 and newer, Galaxy S20 and newer. If it's a reasonably recent phone, you're probably fine. Check our device compatibility page if you want to be sure.
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When should I set up my Japan eSIM?
Before you leave, while you're still on Wi-Fi. Your plan only starts counting when you first connect to a network at your destination, so there's no cost to installing early. Japan plans run from 1 to 45 days from that first connection. One less thing to sort at the airport.
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Which networks does my Japan eSIM use?
Each plan lists its own networks and speed policy under Plan details on this page. Which networks a plan uses is set by our network partners and can change without notice, so we show them per plan rather than for the destination as a whole. Your device finds and connects to a supported network on its own when you arrive.
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Can I top up my Japan eSIM?
Yes, on the fixed-data plans. Running low? Purchase another plan for the same destination from your order page. The new data gets added to your existing eSIM. No reinstall needed. Top-ups are not available on the Unlimited (daily) plans. To keep using data after an Unlimited plan ends, buy a new plan.
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Can I hotspot with my Japan eSIM?
Hotspot availability depends on the plan. Halo adds no separate hotspot cap and does not meter hotspot data differently, so on plans that support it you can share your connection with a laptop, tablet or travel companion where the local network allows. Hotspot is provided by the network operator in Japan rather than by Halo, so it is not something we can guarantee on every plan.
Still have questions?
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