These guides answer the questions that come up between choosing a provider and landing in Japan: how much data you need, what a plan should cost for your trip length, how to set up an iPhone or Android phone, and what changes in a city, on a long stay or in the countryside. For a side-by-side price comparison, start with our Japan eSIM comparison. For one provider in depth, see the provider reviews.
Every guide reads its prices from the same provider dataset as the comparison table, so a price you see here matches the one on the home page. Our comparison method explains how that data is kept and the evidence behind our comparisons.
Costs and data
- Data calculatorHow much data do you need in Japan? Estimate GB for 7, 10, 14 or 30 days from maps, messaging, video and hotspot use, then compare plans for your trip.
- eSIM vs pocket WiFiCompare an eSIM, pocket WiFi and a physical SIM card for Japan. Calculate costs, check phone compatibility, and decide how your group will stay connected.
- Japan eSIM costsSee how Japan eSIM costs vary by trip length and data use. Compare total prices for 3, 7, 14 and 30 days, plus fees and limits to check.
- Japan eSIM for 30 daysCompare 30-day Japan eSIM plans, monthly recurring options and unlimited data for a month, and see when a local SIM suits a longer stay better.
- Unlimited data explainedCompare unlimited Japan eSIM plans by trip length, full-speed data, fair-use rules and hotspot limits. Find the trade-offs before buying.
Phones and setup
- Android eSIM setupInstall a Japan travel eSIM on a Google Pixel or Samsung Galaxy: check model and carrier lock, add the eSIM, choose the data SIM and fix problems.
- iPhone eSIM setupUse your iPhone in Japan: check eSIM support and carrier lock, install a travel plan, keep your number, set roaming and fix connection problems.
- Japan eSIM FAQGet clear Japan eSIM answers: compatibility, phone numbers, buying, data costs, iPhone and Android setup, activation and troubleshooting.
- Japan eSIM phone numbersNeed a Japanese phone number as a tourist? See which Japan eSIMs include a number, calls or SMS, and when a data-only eSIM is enough.
Places and networks
- eSIM in rural JapanPlan mobile data for Japan’s mountains, islands, trails and onsen towns: what affects signal, how to check coverage maps and what to prepare offline.
- Japan and Korea eSIMVisiting Japan and South Korea? Compare one regional eSIM with separate country plans on price, validity, top-ups, hotspot and border crossing.
- Japan mobile networksCompare Japan eSIM networks, iPhone compatibility and official coverage maps. See which providers list Docomo, SoftBank or au.
- Osaka eSIM guideGet online at Kansai Airport, ride Osaka Metro and private railways with ICOCA, and pick one Japan eSIM that also covers Kyoto, Nara and Kobe.
- Tokyo eSIM guideSet up a Japan eSIM for Narita or Haneda, get around Tokyo trains with maps and IC cards, and choose validity for the whole Japan trip.
Comparing providers
- Airalo vs HolaflyAiralo vs Holafly for Japan at matched durations: unlimited from 3 to 30 days, fixed data, hotspot caps, networks and who should pick which.
- Japan eSIM Reddit questionsEvaluate Japan eSIM advice on Reddit: check the trip date, exact package, device, hotspot terms and commercial interest before relying on a recommendation.
- Ubigi vs AiraloUbigi vs Airalo for Japan at matched data and trip lengths: fixed and unlimited prices, package-specific networks, hotspot and activation.