Japan eSIM.
Get your eSIM sorted before you fly and stay connected while travelling in Japan.
Choose your eSIM
Pick the plan that matches how you'll use data in Japan.
Mobile coverage in Japan can vary by network, location and selected plan. Coverage is generally strong in major cities and along Shinkansen routes, but can be limited in rural areas, mountainous regions, and underground or indoor locations. Check your selected plan's coverage details at checkout.
Buy before you fly. Stay connected in Japan.
Don't wait until you arrive. Set up your Japan eSIM from your couch and walk off the plane already online.
Set up before you fly
Install your eSIM at home over Wi-Fi. No airport queues, no fiddly SIM swaps when you land.
Use maps, transit & translation apps
Once your eSIM is connected, you can use mobile data for apps such as Google Maps, translation apps and messaging services.
Keep your home SIM installed
On compatible dual-SIM devices, you can generally keep your home SIM installed while using your Japan eSIM for mobile data. Calls, SMS and other services on your home SIM remain subject to your home carrier's roaming terms and settings.
Use data instead of carrier roaming
One upfront price. Use your travel eSIM for mobile data instead of relying on your home carrier's international roaming data.
What travellers use data for in Japan.
Think about how you'll use your phone day-to-day. It'll help you pick the right plan.
Google Maps
Navigate Tokyo's subway, find your hotel and explore without getting lost.
Train & transit apps
Japan Travel by Navitime and Google Maps for Shinkansen and subway timetables.
Translation apps
Google Translate for menus, signs and conversations — camera and text translation on the go.
Messaging & accommodation
WhatsApp your hotel, family and guides over data without hunting for free Wi-Fi.
Social media
Post stories from Shibuya, Kyoto and Osaka without hunting for Wi-Fi.
Hotspot & family travel
Share hotspot with the family where supported by your plan, or buy a plan each so everyone's connected.
Set up is simple. Do it before you fly.
Most eSIM-compatible iPhones and Androids take less than five minutes to set up. We recommend installing your Japan eSIM at home over Wi-Fi so it's ready to switch on the moment you land.
Japan eSIM questions, answered.
Most eSIM-compatible iPhones (iPhone XS and newer) and recent Android phones work with our Japan eSIM. Use our compatibility checker to confirm your exact model before you buy.
Yes — and we recommend it. Install over Wi-Fi at home so it's ready to switch on when you arrive. Activation conditions vary by plan. Check your selected eSIM's activation details before travelling.
Activation conditions vary by plan. Most activate when you first connect to a supported network in Japan, but some have different rules — check your plan's activation details at checkout for the exact policy. You can install the eSIM at home over Wi-Fi before you fly.
On compatible dual-SIM devices, you can generally keep your home SIM installed while using your Japan eSIM for mobile data. Calls, SMS and other services on your home SIM remain subject to your home carrier's roaming terms and settings.
Most of our Japan plans support hotspot and tethering, but it depends on the specific plan. Check the plan details at checkout to confirm hotspot is supported before you buy.
If you run low, you can buy a top-up or a new plan from your Roamza account. It's delivered instantly — no need to find a shop in Japan.
An eSIM lives on your phone — buy before you fly, install at home, and switch on when you land. Pocket Wi-Fi is a separate router you pick up at the airport or have delivered to your hotel; multiple devices can connect but you carry and charge an extra gadget and return it before you leave. For most solo travellers and couples, an eSIM is simpler. For groups or long stays, pocket Wi-Fi can make sense.
Help if installation doesn't go smoothly.
Clear instructions, transparent policies, and real support if you need it. We're here to make sure you land connected.
Get your Japan eSIMJapan eSIM
Japan is one of the most popular travel destinations, and staying connected while you're there shouldn't mean paying your carrier's roaming rates. A Japan eSIM from Roamza lets you buy your data before you fly, install it at home, and switch it on when you arrive — no SIM swap, no airport queues.
Whether you're chasing neon nights in Tokyo, temple-hopping in Kyoto, or riding the Shinkansen to Osaka, a travel eSIM means you can use Google Maps to find your way, check Japan Travel by Navitime for train times, and message your hotel on WhatsApp without hunting for free Wi-Fi. Once your eSIM is connected, you can use mobile data for apps such as Google Maps, translation apps and messaging services.
On compatible dual-SIM devices, you can generally keep your home SIM installed while using your Japan eSIM for mobile data. Calls, SMS and other services on your home SIM remain subject to your home carrier's roaming terms and settings. Use your travel eSIM for mobile data instead of relying on your home carrier's international roaming data.
How much data do you need in Japan?
It depends on how you use your phone day-to-day. Here's a rough guide:
- Light use: Google Maps for navigating Tokyo's subway, WhatsApp messaging, and light browsing. A smaller data plan is usually plenty.
- Everyday use: Navigation, translation apps like Google Translate, social media, and booking Shinkansen tickets. Most travellers fall here — a mid-size or unlimited plan is a safe pick.
- Heavy use: Video uploads, streaming, video calls, or sharing hotspot with a travel partner. Go for a larger or unlimited plan.
Our Japan plan selector above shows live plans and prices — pick the one that matches how you'll use data.
Setting up your Japan eSIM
Setup takes about five minutes and we recommend doing it before you leave Australia. Once you buy, we email your eSIM QR code and step-by-step instructions. Scan the code, follow the prompts, and your phone is ready. We recommend installing your eSIM at home over Wi-Fi before you fly. Activation conditions vary by plan — check your selected eSIM's activation details before travelling. Not sure if your phone is compatible? Check compatibility before you buy.
Japan eSIM vs pocket Wi-Fi vs physical SIM
There are three main ways to stay connected in Japan:
- eSIM: Buy before you fly, install at home, and switch on when you land. No queues, no SIM tray swap, and you keep your home number on compatible dual-SIM devices. Best for most travellers who want data sorted before departure.
- Pocket Wi-Fi: A portable battery-powered router you pick up at the airport or have delivered to your hotel. Multiple devices can connect, but you carry an extra gadget, charge it daily, and return it before you leave. Can make sense for groups or long stays.
- Physical SIM: Buy at an airport kiosk or electronics store. You'll queue, show your passport, swap your SIM tray, and get a new local number. Works, but takes time and means your home SIM is out of the phone while it's in use.
None of these is universally best for everyone — it depends on your trip length, group size, and how many devices you need online. For most solo travellers and couples, an eSIM is the simplest option: buy before you fly, keep your home SIM, and land ready to connect.
Ready to go? See Japan plans and get your eSIM, read our Japan travel data guide, or get in touch if you have any questions. See our Fair Use Policy for unlimited plan details, or the installation guide for step-by-step setup.
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