Internet and Wi-Fi in Japan
What to expect from mobile coverage, public Wi-Fi and data options in Japan — and the simplest way to get online as a visitor.
Mobile coverage in Japan
Excellent LTE/5G, but open Wi-Fi is rare and cafes rarely share passwords - mobile data is close to essential.
Local networks
Our Japan eSIM connects to these local mobile networks, the same ones domestic SIM cards use:
- NTT docomo
- Rakuten Mobile
- KDDI/au
- SoftBank
Can you rely on public Wi-Fi?
Hotels, cafes and airports in Japan usually offer Wi-Fi, but it rarely helps when you need a connection most: navigating between places, checking transport in real time, or calling a ride from the street. Public networks are also unencrypted more often than not. Treat Wi-Fi as a bonus, not a plan.
The easiest way to get online
A prepaid eSIM for Japan installs on your phone before you leave home and connects to a local network automatically when you land — no store visits, no paperwork, no roaming fees. Plans start at $0.51.
See Japan eSIM plansFrequently asked questions
Which mobile networks operate in Japan?
The main networks our eSIM connects to in Japan include NTT docomo, Rakuten Mobile, KDDI/au, SoftBank. Switching between them is automatic — your phone picks the strongest available signal.
Is public Wi-Fi safe to use in Japan?
Use it with care: open networks in Japan are often unencrypted, so avoid logging into banking or entering card details on public Wi-Fi. A mobile data connection is both safer and available everywhere you go.
What is the cheapest way for tourists to get internet in Japan?
A prepaid eSIM is usually the cheapest practical option — Japan plans start at $0.51, with no roaming fees, no rental hardware and no store visit required.
