Japan Wireless eSIM – Review & Full Test 2026

🌍

Countries covered

1 countries

💶

Starting at

5,00 €

📶

Network

5G

📊

Data

Unlimited

❌

Calls/SMS

No

🌐

App

No

Reliable national coverage on Docomo and KDDI, even in rural areas.

Affordable unlimited plans with instant QR code activation.

Multilingual customer support 7 days a week, suitable for foreign travelers.

Hotspot allowed, perfect for sharing connection.

Destinations & coverage

Japan Wireless specializes exclusively in Japan with national coverage on the best networks.

By region

Key points

✅

Advantages

  • ✓ Extensive coverage everywhere in Japan, including mountains and trains.
  • ✓ Competitive local prices with no hidden fees.
  • ✓ Ultra-simple installation with no app or ID required.
  • ✓ Responsive English support via chat/email/phone.
⚠️

Disadvantages

  • ✗ Data only for Japan, not multi-country.
  • ✗ Reduced speed after FUP threshold on unlimited plans.
  • ✗ No native calls/SMS included.
  • ✗ Limited refund without insurance.

Customer reviews

site reviews

4/5

“

Reliable and easy to use for 3 weeks in Japan, good speed and coverage everywhere, perfect for seniors without changing SIM.

January 1, 2026

blog review

4/5

“

Activation in seconds, 3GB/day sufficient, good for daily use but watch speed after limit.

September 1, 2025

user feedback

4/5

“

Excellent coverage in Tokyo and Kyoto, quick support helped with setup.

October 1, 2025

Description

Japan Wireless is a Japanese provider dedicated to eSIMs for tourists visiting Japan. Based in Tokyo and publicly listed, it offers unlimited data plans (with FUP) from 1 to 30 days on the premium networks NTT Docomo and KDDI, ensuring national coverage including rural areas and Shinkansen. Instant activation via QR code, no app required, hotspot allowed, no native calls/SMS but VOIP possible. Perfect for short or long-stay travelers in Japan seeking simplicity, affordable local prices (from 5€) and responsive multilingual support.

How it works

Confirm your smartphone supports eSIM (recent iPhone, compatible Android).

Select duration and data on Japan Wireless website, pay and receive QR code immediately.

At airport WiFi, go to Settings > Cellular > Add eSIM and scan the code.

Follow email instructions to install, up to 30 days before activation.

In Japan, enable data roaming for Japan Wireless eSIM and select it for mobile data.

Disable airplane mode, check internet and monitor usage via settings.

⚠️ If it fails

✅ Ensure stable WiFi, restart, try manual setup if QR fails. Contact support.

✅ Enable data roaming, select Japan Wireless eSIM, restart device.

✅ This is normal FUP on unlimited; switch to WiFi for heavy use.

Alternatives

FAQ

Choose the unlimited 7-day plan: generous data with FUP, ideal for browsing, GPS, and social networks without worries.

Yes, tethering/hotspot is fully allowed on all plans.

All eSIM-compatible smartphones (iPhone XS+, Samsung Galaxy S20+, Google Pixel 3+, etc.). Check on their website.

Refund possible only with purchased insurance; otherwise non-refundable. Contact support immediately.

Yes, installation up to 30 days before, but activation and data connection only in Japan.

Data only; no Japanese number, use VOIP apps like WhatsApp or Skype.

Excellent everywhere thanks to Docomo and KDDI: cities, rural, mountains, Shinkansen.

Company info

Legal name: Inbound Platform Corp.

Address: 4th floor, SW Shimbashi Building, 6-14-5 Shimbashi, Minato-ku, Tokyo

Website: https://www.japan-wireless.com

Support

7 days a week

email, chat, phone

Accepted payments

Visa, Mastercard, American Express, JCB, Discover, Diners, Apple Pay, Google Pay

Platforms

Web

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