Best High-Speed 5G/4G Travel eSIM Packages for Japan Compare the best travel eSIM plans for Japan. Find cheap per-GB rates, unlimited daily 5G passes, instant QR delivery, and zero-KYC activation from Airalo, Nomad, Ubigi, and more. Provider Data Allowance Validity Network Carrier Price (USD) Maya Mobile 1 GB 7 Days SoftBank / Docomo (4G LTE) $3.40 RedteaGO 1 GB 7 Days SoftBank / Docomo (5G) $4.10 Airalo 1 GB 7 Days SoftBank / KDDI (4G LTE) $4.50 Nomad 3 GB 10 Days SoftBank (4G LTE) $7.20 RedteaGO 3 GB 10 Days SoftBank (4G LTE) $7.20 Roamless 3 GB 10 Days SoftBank / Docomo (4G LTE) $7.20 Saily 3 GB 10 Days SoftBank (4G LTE) $7.20 Eskimo Global 3 GB 10 Days SoftBank (5G) $7.20 Airalo 5 GB 15 Days SoftBank (5G) $10.80 Ubigi 5 GB 15 Days SoftBank / Docomo (4G LTE) $10.80 Japan 5G/4G Carrier Network Comparison (SoftBank vs Docomo vs KDDI) Reliable high-speed cellular connectivity across Tokyo, Osaka, Kyoto, Hokkaido, and Mount Fuji: 📡 NTT Docomo Japan's largest carrier with the most extensive coverage in rural areas, mountainous regions, and underground subway lines. 📡 SoftBank 5G Super-fast 5G speeds in major metropolitan centers and flawless hardware compatibility with overseas smartphones. 📡 KDDI / au High-quality urban network with excellent latency for navigation and video streaming. 🛡️ KYC: Zero identity registration (No KYC) required. Instant activation upon scanning your QR code. 📲 How to Install & Activate your Japan eSIM (3 Simple Steps) Choose & Purchase: Pick your ideal data pass on EsimTao. Your instant QR Code arrives within seconds via email.Scan QR Code: Open your smartphone Settings > Cellular / Mobile Service > Add eSIM, then scan the QR code.Turn on Roaming at Destination: Upon landing in Japan, switch on Data Roaming for your eSIM to connect to local 5G.