Best eSIM for Japan
Get instant 5G connectivity in Tokyo, Osaka, and beyond. Starting from $2.50
Works on NTT Docomo, SoftBank, and KDDI/au networks
Why Choose AlwaySim for Japan?
Premium 5G Coverage
Access NTT Docomo, SoftBank, and KDDI/au networks with the fastest 5G speeds across Japan.
Instant Activation
Activate in 15 seconds at Narita or Haneda Airport. No paperwork, no queues.
No Registration
No Japanese address or My Number card required. Purchase and use immediately.
Available Japan eSIM Plans
Perfect for tourists, business travelers, and working holidaymakers
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View All PlansJapan Network Coverage
Supported Networks
- NTT Docomo - 5G/4G LTE Nationwide
- SoftBank - 5G/4G LTE Nationwide
- KDDI/au - 5G/4G LTE Nationwide
- Automatic network switching
Coverage Areas
- Tokyo - Complete 5G coverage
- Kyoto - Full coverage historic & modern areas
- Osaka - Citywide coverage
- All Regions - Nationwide including rural areas
Network Speeds
How to Activate Your Japan eSIM
Purchase Online
Choose your Japan eSIM plan and complete checkout. Instant QR code delivery via email.
Scan QR Code
Open your phone settings and scan the QR code to install your Japan eSIM profile.
Connect Instantly
Land in Japan and connect automatically. Your eSIM activates in 15 seconds.
Japan eSIM Frequently Asked Questions
Do I need a Japanese address to buy an eSIM?
No! AlwaySim eSIMs can be purchased from anywhere in the world. No Japanese address or residency card required. Simply purchase online and receive your QR code instantly.
Will my Japan eSIM work in rural areas and on trains?
Yes! Our Japan eSIM works throughout the country including rural areas, mountains, and Shinkansen bullet trains. Japan has excellent nationwide coverage with NTT Docomo, SoftBank, and KDDI/au networks.
Which networks does the Japan eSIM use?
Our Japan eSIM automatically connects to premium networks including NTT Docomo, SoftBank, and KDDI/au. You'll get the best available 4G/5G signal wherever you are in Japan.
Can I use hotspot with my Japan eSIM?
Yes! Most Japan eSIM plans support mobile hotspot/tethering. You can share your connection with other devices like laptops or tablets. Check specific plan details for any restrictions.
How fast is the internet speed in Japan?
Japan has world-class mobile network infrastructure. Expect 5G speeds up to 2 Gbps in Tokyo and major cities, and 4G LTE speeds of 50-150 Mbps nationwide. Perfect for video calls, streaming, and navigation.
Is the Japan eSIM cheaper than pocket WiFi?
Absolutely! Pocket WiFi rentals cost $8-15 per day and require airport pickup/return. Our Japan eSIM plans start from just $2.99, saving you money and hassle. No rental fees, no deposits, no returns needed.
Stay Connected Across Japan
Tokyo
Shibuya, Shinjuku, Asakusa, Akihabara
Kyoto
Temples, Geisha District, Arashiyama
Osaka
Dotonbori, Universal Studios, Castle
Mt. Fuji
Hakone, Kawaguchiko, Hiking trails
Ready to Stay Connected in Japan?
Get your Japan eSIM now and enjoy instant 5G connectivity from arrival