Japan WiFi Buddy eSIM – Review & Full Test 2026

🌍

Countries covered

1 countries

💶

Starting at

19,00 €

📶

Network

5G

📊

Data

Affordable-Unlimited

❌

Calls/SMS

No

🌐

App

No

99%+ coverage of Japan, including rural and shinkansen areas.

Flexible plans from 15 days to 1 year, data from basic to unlimited.

Instant activation by email, no pickup or return needed.

Tethering allowed to connect multiple devices.

Competitive prices with payment in 135 currencies.

Destinations & coverage

Japan WiFi Buddy focuses exclusively on Japan, with 99%+ coverage across the entire national territory, from metropolises to rural areas.

By region

Key points

✅

Advantages

  • ✓ Attractive rates starting at €19, best value on the market.
  • ✓ Reliable coverage throughout Japan via major networks.
  • ✓ Ultra-simple and fast eSIM setup.
  • ✓ No physical commitment, keep or discard SIM if purchased.
  • ✓ Responsive native English customer support.
⚠️

Disadvantages

  • ✗ Only for Japan, not global.
  • ✗ Data-only, no calls or SMS.
  • ✗ No dedicated mobile apps.
  • ✗ Variable quality in very isolated areas.

Customer reviews

site reviews

5/5

“

Excellent value, easy setup, reliable coverage. Highly recommended for traveling to Japan.

February 20, 2026

site reviews

5/5

“

eSIM instructions received quickly, smooth usage during travel. Perfect.

February 20, 2026

site reviews

5/5

“

Great price and easy to use. Essential for Japan.

February 20, 2026

Description

Japan WiFi Buddy offers data-only eSIMs for Japan, with plans ranging from budget options at $21 for 15 days to powerful unlimited plans. Ultra-wide coverage (99%+) via Softbank and other major networks, high speeds (up to 187 Mbps), easy tethering to share connection. Ideal for tourists, business travelers, or long stays in Japan: immediate activation via email, no returns needed, payment in 135 currencies. Native English support and simple setup for connection right upon landing, without exorbitant roaming fees.

How it works

Visit japanwifibuddy.com, select a Japan eSIM plan (duration, data), and pay in the chosen currency.

After payment, immediately receive the eSIM QR code and installation details by email.

Make sure your smartphone supports eSIM (iPhone XS+, Samsung S20+, etc.).

Go to Settings > Cellular/Mobile > Add eSIM, scan the received QR code.

Upon landing, select the Japan WiFi Buddy eSIM for mobile data and enable data roaming.

Connect, enable hotspot if needed. Monitor consumption via device settings.

⚠️ If it fails

✅ Check stable WiFi connection to scan QR, device compatibility, and restart. Contact support if it persists.

✅ Toggle Airplane mode on and off, select eSIM data, verify roaming. Test in a covered area.

✅ Disable auto updates, HD streaming; opt for unlimited plan if heavy user.

Alternatives

FAQ

For 1-2 weeks, choose the 15-day plan at €19: immediate connection, good data for maps and social networks.

Yes, tethering is allowed to share data with tablets/laptops, up to 10 devices recommended max 2-3 simultaneous.

Yes if eSIM supported: iPhone XS+, Galaxy S20+, Pixel 3+. Check the list on Apple/Samsung website.

Contact support immediately; policies vary, post-purchase activation often non-refundable.

Yes, dual-SIM: keep physical SIM for calls, eSIM for Japan data.

99%+ Japan via Softbank/Docomo, 4G/5G, reliable in city/rural/shinkansen.

Check website for codes like MYBESTSIM; flexible payments in 135 currencies.

Company info

Website: https://www.japanwifibuddy.com

Support

email, contact form

Accepted payments

Credit Card, 135 currencies

Platforms

Web

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