Easygo Japan SIM
Japan Prepaid Data eSIM — KDDI / SoftBank
Japan Prepaid Data eSIM — KDDI / SoftBank
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Unlimited Japan eSIM — Daily Unlimited Data on KDDI & SoftBank
Stay connected throughout your Japan trip with our unlimited Japan eSIM. Get truly unlimited data every day — no throttling, no data caps — running on Japan's top-ranked KDDI (au) and SoftBank 4G/5G networks. Your QR code arrives in your inbox instantly after purchase. Activate before you fly, connect the moment you land.
⚡ Why Choose Our Unlimited Japan eSIM?
- 🔓 Truly unlimited data — stream, navigate, video call all day without hitting a cap
- 📶 KDDI & SoftBank dual-network coverage — 99%+ of Japan covered including rural areas and mountains
- 📧 Instant QR code delivery — sent to your email within seconds of purchase
- 🛬 Works from the moment you land — activate in advance, connect automatically at the airport
- 💳 No SIM card, no pickup — 100% digital, works on any eSIM-compatible phone
- ✅ Valid from Day 1 of activation — not from purchase date, so no wasted days
📋 Unlimited Japan eSIM Plans
Choose the number of days that matches your trip. All plans include daily unlimited data:
| Plan | Daily Data | Best For |
|---|---|---|
| 3 Days Unlimited | Unlimited/day | Short stopover or weekend trip |
| 5 Days Unlimited | Unlimited/day | Golden Week / short holiday |
| 7 Days Unlimited | Unlimited/day | One-week vacation |
| 10 Days Unlimited | Unlimited/day | Extended sightseeing trip |
| 15 Days Unlimited | Unlimited/day | Two-week adventure |
| 30 Days Unlimited | Unlimited/day | Long stay / working holiday |
Need a fixed data allowance instead? We also offer 500MB, 1GB, 2GB per day plans, plus data package plans (total GB for the full stay).
📱 How to Set Up Your Unlimited Japan eSIM — 5 Easy Steps
- Purchase — select your plan and complete checkout
- Receive QR code — check your email inbox (arrives within seconds)
- Install eSIM — go to Settings → Cellular/Mobile → Add eSIM → Scan QR code
- Enable data roaming — turn on Data Roaming for the Japan eSIM line
- Arrive & connect — your unlimited data activates automatically on Day 1
📍 Network Coverage
Our unlimited Japan eSIM runs on the KDDI (au) and SoftBank networks — two of Japan's three major carriers, covering Tokyo, Osaka, Kyoto, Hiroshima, Hokkaido, Okinawa and virtually every corner of the country. Whether you're exploring urban centres or hiking in the Japanese Alps, you stay connected.
📱 Compatible Devices
Works with all eSIM-capable smartphones including:
- iPhone XS, XR and all newer models (iPhone 16, 15, 14, 13, 12, 11 series)
- Samsung Galaxy S20, S21, S22, S23, S24 series; Note 20; Z Fold/Flip series
- Google Pixel 3a and later (Pixel 9, 8, 7, 6 series)
- iPad (Wi-Fi + Cellular), iPad Pro, iPad Air (2019 and later)
Tip: Make sure your device is unlocked (not carrier-locked) before purchasing.
❓ Frequently Asked Questions — Unlimited Japan eSIM
Is the data really unlimited? No speed throttling?
Yes, truly unlimited. Our unlimited Japan eSIM plans have no daily data cap and no speed throttling. You get full 4G/5G speeds all day on KDDI and SoftBank networks.
When does my unlimited plan start?
Your plan starts on the day you first use data in Japan — not from the date of purchase. So you can install the eSIM before you leave home without wasting any days.
Can I use the unlimited eSIM for hotspot / tethering?
Yes! You can share your unlimited Japan eSIM data with laptops and other devices via mobile hotspot (Personal Hotspot / Wi-Fi Tethering).
How quickly do I receive the QR code after purchase?
Your QR code is delivered to your email within seconds of completing checkout — 24 hours a day, 7 days a week. No waiting for business hours.
Will my unlimited Japan eSIM work at Tokyo Narita / Haneda airport right when I land?
Yes. KDDI and SoftBank coverage begins at all major Japanese airports. Your eSIM connects automatically as soon as your phone detects the network.
Do I need to remove my current SIM card?
No. An eSIM is digital and installed alongside your existing physical SIM. Your home number stays active for calls and texts; the Japan eSIM handles all your data.
What if I need more days after my plan expires?
Simply purchase a new plan and scan the new QR code. There's no need to reinstall — just add the new eSIM profile to your phone.
Is this unlimited Japan eSIM compatible with 5G?
Yes, where 5G coverage is available on KDDI or SoftBank networks, your eSIM will connect to 5G automatically. Coverage is available in major cities including Tokyo, Osaka, Nagoya, and Fukuoka.
Can I use this eSIM in Okinawa and Hokkaido?
Absolutely. KDDI and SoftBank cover all 47 prefectures including Okinawa, Hokkaido, and remote islands. Remote areas may be 4G LTE rather than 5G, but you'll still have connectivity.
What is your refund policy?
We offer a full refund if the eSIM has not been activated (QR code not scanned). Once activated, refunds are not available as the data service has begun. Please contact us at mail@easygojapan.com with any issues.
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