How much eSIM data do you need for Japan?
Use this quick calculator to estimate a sensible mobile-data range for your Japan trip before choosing an eSIM plan.
Japan data calculator
What uses data while travelling?
- Maps and navigation throughout the day
- Train and route searches
- Translation and web searches
- Messaging and photo sharing
- Social media
- Video and cloud backups
- Hotspot use for another device
Video, automatic photo backups and hotspot use can increase consumption much faster than maps or messaging.
Before buying a Japan eSIM
- Check that your phone supports eSIM.
- Make sure the device is carrier-unlocked.
- Check when the plan starts: installation or first network connection.
- Check whether tethering or hotspot use is allowed if you need it.
- Keep the installation details accessible before you travel.
Country plan or regional Asia plan?
If Japan is your only destination, a Japan-specific plan may be simpler. If your trip includes several countries, compare it with a regional plan so you do not have to switch connectivity during the trip.
The calculator is an estimate, not a measurement of actual future use. Your consumption depends on apps, settings and network behaviour.
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