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.

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 plans

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