Japan Unlimited Data eSIM - 21 Days

Unlimited data in Japan with 20GB hotspot tethering, no daily limits, and instant activation

Planning a longer trip to Japan? The Japan Unlimited Data eSIM - 21 Days gives you unlimited high-speed internet on the trusted KDDI network, helping you stay connected from the moment you arrive until you return home.

Designed for tourists, business travellers, students, digital nomads, and long-stay visitors, this eSIM provides pure unlimited data, no daily data caps, and premium network coverage across Japan. Whether you're using Google Maps, uploading travel photos, making video calls, streaming content, or working remotely, you'll have the data you need throughout your trip.

Avoid expensive roaming charges, airport SIM queues, and unreliable public WiFi. Simply install your eSIM before departure and connect instantly when you arrive in Japan.

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With unlimited data, 20GB hotspot sharing, speeds up to 1Gbps, and access to the KDDI local network, this is an ideal connectivity solution for travellers spending up to three weeks in Japan.

Key Features

Why Travellers Choose This Japan eSIM

1. Unlimited Data for 21 Days

Use your smartphone freely throughout your trip without worrying about running out of data.

Perfect for:

• Google Maps
• WhatsApp
• LINE
• Instagram
• TikTok
• YouTube
• Travel planning
• Translation apps
• Video calls
• Online bookings

2. No Daily Data Caps

Unlike many travel SIMs that reduce speeds after reaching a daily limit, this plan provides unlimited data with no daily usage restrictions.

3. Connect to the Premium KDDI Network

Enjoy reliable coverage across Japan, including:

• Tokyo
• Osaka
• Kyoto
• Nara
• Hiroshima
• Nagoya
• Sapporo
• Fukuoka
• Okinawa
• Mount Fuji region

And thousands of other locations nationwide.

4. Speeds up to 1Gbps

Experience fast connectivity suitable for:

• HD and 4K streaming
• Social media uploads
• Cloud applications
• Business use
• Video conferencing
• Remote working

5. 20GB Hotspot Tethering Included

Share your connection with other devices during your trip.

Ideal for:

• Laptops
• Tablets
• Secondary smartphones
• Family members
• Travel companions

6. Instant eSIM Delivery

No physical SIM card required.

Simply:

1. Purchase online
2. Receive your QR code instantly by email
3. Install the eSIM on your device
4. Travel to Japan
5. Connect automatically to the KDDI network

7. Buy Before You Travel

Your activation QR code remains valid for 180 days, allowing you to purchase your eSIM well before departure.

Supported Country

Japan

Device Compatibility

Compatible with unlocked eSIM-enabled smartphones and devices, including:

Apple: iPhone 11, iPhone 12 Series, iPhone 13 Series, iPhone 14 Series, iPhone 15 Series, iPhone 16 Series and newer supported models.

Samsung: Galaxy S20 Series, S21 Series, S22 Series, S23 Series, S24 Series, S25 Series, Galaxy Fold and Flip devices with eSIM support.

Google: Pixel 4 and newer supported Pixel devices.

Other Brands: Selected Motorola, Oppo, Sony, Xiaomi, Honor and other eSIM-compatible smartphones.

Please ensure your device supports eSIM technology and is unlocked before purchasing.

How to Activate

1. Purchase the Japan Unlimited Data eSIM.
2. Receive your QR code by email.
3. Open your device's eSIM settings.
4. Scan the QR code.
5. Install the eSIM profile.
6. Arrive in Japan.
7. Connect to the KDDI network.
8. Start using unlimited data immediately.

Frequently Asked Questions

1. How much data is included?

This eSIM includes unlimited data for the full 21-day validity period.

2. Is there a daily data limit?

No. There are no daily data caps or daily usage restrictions.

3. Which network does the eSIM use?

The eSIM connects to the KDDI mobile network in Japan.

4. Can I use hotspot or tethering?

Yes. The plan includes 20GB of hotspot tethering.

5. Does it work throughout Japan?

Yes. Coverage is available throughout Japan where KDDI service is supported, including major cities, tourist destinations, airports, and transport routes.

6. Does the eSIM include calls or SMS?

No. This is a data-only travel eSIM and does not include a Japanese phone number, voice calls, or SMS messages.

7. When does the validity period start?

The 21-day validity period begins when the eSIM first connects to a supported network in Japan.

8. How long is the QR code valid?

The activation QR code remains valid for 180 days from the purchase date.