Japan WiFi and eSIM Guide

Best Options for Staying Connected

eSIM (Best Modern Option)

Install on your smartphone before leaving home. Works immediately on arrival. No queue at the airport.
Airalo: 1GB ~$4.50, 5GB ~$13, 20GB ~$32. Reliable NTT Docomo network.
Saily: 1GB ~$3.99, 5GB ~$12.99. Newer provider, competitive pricing.
Holafly: Unlimited options. 5 days ~$20, 10 days ~$30.
Requires: iPhone XS or later, or Android equivalent with eSIM support. — book a Yesim eSIM in advance for the best price.

Pocket WiFi

Portable router for multiple devices simultaneously. ¥400–700/day, unlimited options available. Good for groups. Must carry and charge an extra device. Available at airport rental desks.

Physical SIM

Buy at airport or electronics stores (Yodobashi Camera, BIC Camera). ¥3,000–4,500 for 15–30 days unlimited. IIJmio and b-mobile offer good tourist SIMs.

Free WiFi

Available at convenience stores, major train stations, airports, Starbucks, McDonald’s, and many tourist sites. JapanFreeWiFi app aggregates hotspots. Adequate for maps and messaging.