Cheapest eSIM Plans for Japan (Under $10)

Quick Guide: Budget eSIM

Japan on a budget? Data doesn't have to be expensive. Plans under $10 cover 1-3 GB — enough for a week of maps, train lookups, and messaging if you use hotel WiFi for heavier tasks. The trick: compare price per GB, not just total price. A $5 plan with 1 GB ($5/GB) is actually worse value than an $8.50 plan with 3 GB ($2.83/GB). We sort by value below so the best deals are at the top. Saily and Airalo consistently offer the cheapest quality plans.