eSIM vs pocket WiFi vs offline apps
Three ways to stay functional in Japan, and the honest answer is you probably want one connectivity option plus offline preparation. Here's the tradeoff.
eSIM (~$3–4/day)
- Pros: no hardware, install before departure, keep your number for 2FA texts.
- Cons: needs an eSIM-compatible phone; data-only (no Japanese phone number); still dies in basements and rural areas.
- Best for: most travelers. Buy from Airalo, Ubigi, or similar before you fly.
Pocket WiFi (~$5–8/day)
- Pros: works with any phone/laptop, easy pickup at the airport, shareable across devices.
- Cons: another gadget to charge and carry, must be returned, pricier for solo travelers.
- Best for: groups, families, or anyone with an older phone.
Free WiFi + offline apps ($0)
- Pros: free.
- Cons: station/konbini WiFi needs registration each time and drops as you move; you'll spend the trip hunting for signal.
- Best for: budget travelers who plan their days on hotel WiFi each morning.
The thing nobody tells you
All three fail in the same places — basement restaurants, subway tunnels, rural temples. Connectivity is not a substitute for preparation: offline maps, downloaded translation packs, and screenshots of key addresses cover the gaps no SIM card can.
Our recommendation
Get an eSIM for daily use, and spend 20 minutes on hotel WiFi the night before you fly building your offline survival kit. That's the setup that never leaves you stranded.