Japan Unlimited Data eSIM - 31 Days

Unlimited data in Japan for 31 days with 30GB hotspot tethering and no daily limits

Looking for the best unlimited data eSIM for Japan? The Japan Unlimited Data eSIM - 31 Days gives you a full month of unlimited high-speed internet on the trusted KDDI network, one of Japan's leading mobile operators.

Designed for travellers who need reliable connectivity throughout an extended stay, this eSIM provides unlimited data for navigation, social media, messaging, video streaming, remote working, online learning, travel bookings, and video calls without worrying about running out of data.

Whether you're visiting Tokyo, Osaka, Kyoto, Hiroshima, Nara, Nagoya, Sapporo, Fukuoka, Okinawa, or travelling across the entire country, you'll benefit from premium local network coverage and fast internet speeds.

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With pure unlimited data, no daily data caps, speeds up to 1Gbps, and 30GB hotspot tethering, this is one of the most popular options for visitors staying in Japan for several weeks or a full month.

Key Features

Why Travellers Choose This Japan eSIM

1. Unlimited Data for a Full Month

Use your smartphone freely throughout your trip without monitoring data usage.

Perfect for:

• Google Maps and navigation
• WhatsApp and LINE
• Social media
• Travel bookings
• Translation apps
• Video streaming
• Online shopping
• Remote working
• Video conferencing

2. No Daily Data Caps

Unlike many travel eSIMs that slow down after reaching a daily allowance, this plan includes unlimited data with no daily usage restrictions.

This means you can stream, browse, upload, and work online whenever you need.

3. Access to the Premium KDDI Local Network

Connect directly to one of Japan's most trusted mobile networks with strong coverage across major cities, tourist attractions, transport routes, airports, and regional destinations.

Coverage includes:

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

And many more locations throughout Japan.

4. Speeds up to 1Gbps

Enjoy fast mobile internet suitable for:

• HD and 4K streaming
• Uploading photos and videos
• Cloud applications
• Business use
• Remote work
• Video meetings
• Mobile hotspot usage

5. 30GB Hotspot Tethering Included

Share your connection with other devices while travelling.

Ideal for:

• Laptops
• Tablets
• Secondary smartphones
• Travel companions
• Business devices

6. Instant eSIM Delivery

No physical SIM card required and no airport collection needed.

Simply:

1. Purchase online
2. Receive your QR code by email
3. Install the eSIM before departure or upon arrival
4. Connect automatically to the KDDI network
5. Start using unlimited data

7. Buy Before You Travel

Your activation QR code remains valid for 180 days, allowing you to purchase your eSIM well in advance of your trip.

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 carrier 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. Travel to 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 31-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 30GB of hotspot tethering.

5. Does the eSIM work throughout Japan?

Yes. Coverage is available throughout Japan where KDDI network 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 begin?

The 31-day validity period starts 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.