About / Editorial policy
A transparent planning tool for Japan connectivity.
Japan Internet Planner helps travelers compare feasible eSIM, pocket WiFi and hybrid setups before they buy.
Purpose and scope
The calculator compares a small set of representative public prices. It is a planning estimate, not a complete market search, coverage guarantee or claim that one provider is universally cheapest.
How recommendations are calculated
We estimate data needs from group size, trip length and usage, exclude setups that cannot keep each subgroup connected, and rank the remaining options by the displayed assumptions. Coverage priority is shown as guidance and does not silently change the price ranking.
Prices and sources
Prices come from linked provider pages and are checked on the date shown in the planner. Currency conversion, taxes, delivery, insurance, fair-use limits and network conditions can change the final cost, so travelers should verify the official checkout before buying.
Editorial and correction policy
The site is independently operated under the name Japan Internet Planner. We do not publish a personal operator identity. If a material price, calculation or explanation is found to be wrong, we correct it and update the review date where appropriate.
Affiliate disclosure
Some outbound links may become affiliate links. A commission does not increase the traveler's price and does not change the calculator's formulas or ranking rules. Sponsored relationships will be disclosed where they apply.