Japan eSIM

4G/LTE and 5G via NTT Docomo, SoftBank and au; world-class reliability nationwide — Outstanding nationwide — including rural mountains, regional rail lines and remote islands. Japan consistently ranks among the world's strongest and most reliable networks.

Japan's public Wi-Fi is widely available in stations and convenience stores. Navigation still uses 500MB–1GB per day, so 3GB suits a week comfortably and gives you breathing room.

Japan's convenience stores — 7-Eleven, FamilyMart and Lawson — are open 24/7 nationwide and genuinely useful: ATMs that accept foreign cards, great food, mobile charging and even travel tickets. They're one of Japan's most underrated travel resources.