Internet in Japan: roaming, eSIM, local SIM and VPN explained
Japan has one of the most reliable mobile networks in the world, but free public wifi is scarcer than most travelers expect. Here's how to stay online from the moment you land.
Roaming with your own plan
Japan isn't covered by EU roaming rules. Traveling with a Dutch or Belgian plan means roaming charges can add up fast, check with your provider before you leave.
eSIM for Japan
You can install an eSIM before you leave, so maps, translation apps and the Suica app work the moment you land at Narita or Kansai. If your device supports dual SIM, your own number stays active alongside the eSIM.
Local SIM card
Local prepaid SIMs are available at the airport and electronics stores, usually with passport registration. Activating an eSIM beforehand saves time after a long flight.
Mobile coverage in Japan
The three largest networks are docomo, au and SoftBank, with excellent coverage across almost the entire country, including the Tokyo and Osaka subway. Shinkansen wifi is often slow and unstable, rely on your own data instead. Outside major cities, in mountainous areas for example, speeds can drop.
Do you need a VPN?
Japan has no internet censorship, so a VPN isn't necessary to access services. It does add an extra layer of security on shared wifi at convenience stores and stations, and keeps your own streaming catalog accessible.
Practical tips
- Bring enough data for Google Maps and translation apps, especially outside major cities
- Shinkansen wifi is often slow, rely on your own data during long train journeys
- Mobile internet generally works fine in the Tokyo and Osaka subway, even underground
- Check that your device supports eSIM before you leave
Our recommendation
For most travelers, an eSIM is the simplest solution for Japan: no roaming surprises, online the moment you land. Check our eSIM comparison for Japan for current options, or read more about VPNs for Japan if you'll be on shared wifi a lot.
Frequently asked questions
Do I need an eSIM in Japan?+
Not necessarily, but it's the fastest way to be online from arrival, without finding a shop at the airport.
Does roaming work with a Dutch or Belgian plan?+
Japan isn't covered by EU roaming rules, so roaming charges can add up fast. Check with your provider before you leave.
Does mobile internet work in the subway?+
Yes, in Tokyo and Osaka mobile internet generally works fine even underground. Shinkansen wifi tends to be less reliable.
Do I need a VPN in Japan?+
Japan has no internet censorship, so a VPN isn't necessary. It's useful for extra security on public wifi and for accessing your own streaming catalog.
Can I keep my own number with an eSIM?+
Usually yes, on devices with dual-SIM support: your own SIM or eSIM stays active alongside the new Japanese eSIM.
Ready for your trip across Japan?
Check out our eSIM tips and recommended plans for Japan.
See eSIM for Japan