Ninja WiFi eSIM – Review & Full Test 2026

🌍

Countries covered

1 countries

💶

Starting at

3,00 €

📶

Network

5G

📊

Data

1GB/day-Unlimited

❌

Calls/SMS

No

Complete coverage in Japan on SoftBank 4G/LTE/5G and Docomo 5G networks.

Easy pickup and returns at major airports (Haneda, Narita, Kansai).

Flexible unlimited or limited data plans, hotspot sharing allowed.

Affordable prices starting at 440¥/day for 1GB/day, ideal for tourists.

Official ratings

Destinations & coverage

By region

Key points

✅

Advantages

  • ✓ Convenient pickup points at airports and hotels.
  • ✓ Varied plans for solo travelers, families, or heavy users.
  • ✓ Stable and fast connection in Japanese cities.
  • ✓ No long-term contract, simple credit card payment.
  • ✓ eSIM option for light travelers without hardware.
⚠️

Disadvantages

  • ✗ Coverage limited to Japan only.
  • ✗ Speed throttled after data limit (128kbps).
  • ✗ No calls/SMS in standard data plans.
  • ✗ Limited support according to reviews, high extension fees.

Customer reviews

✓ Verified traveler

1/5

“

Horrible service: severe throttling on unlimited plan making it unusable, unresponsive support, expensive and delayed extra data.

December 1, 2025

site_officiel

5/5

“

Excellent service, reliable connection everywhere, strong recommendation for friends and family.

March 1, 2026

site_officiel

5/5

“

Stable WiFi and good quality, except basement; very satisfying.

March 1, 2026

Description

Ninja WiFi, a service by Vision Inc., offers rental of pocket WiFi routers, SIM, and eSIM for high-speed internet connection in Japan via SoftBank 4G/5G and Docomo 5G. Covering the entire country, it offers plans from 1GB/day to unlimited, durations from 5 to 60 days, starting at 440¥/day (about €2.6), with easy pickup at airports like Haneda, Narita, Kansai. Ideal for families, groups, or solo travelers seeking simplicity, hotspot sharing, and no physical SIM for eSIM; perfect for tourists visiting Tokyo, Kyoto, Osaka without roaming stress.

How it works

Go to ninjawifi.com, choose plan (pocket WiFi/SIM/eSIM), duration, data, and pay by credit card.

Select airport (Haneda etc.), hotel or delivery; receive QR for eSIM by email.

At airport, show reservation; for eSIM, scan QR before flight on compatible smartphone.

Turn on pocket WiFi (password provided), connect devices; for eSIM, activate in settings.

Share hotspot; throttle after data limit; extend if needed via website.

Drop at airport counter or return box; disposable SIM/eSIM.

⚠️ If it fails

✅ Check if data limit reached (throttling), restart device, enable mobile data/roaming for eSIM.

✅ Confirm compatibility (SIM-free, eSIM support), stable WiFi for QR, contact support.

✅ Arrive early, locate counter via instructions; support phone +81-50-8882-5774.

Alternatives

FAQ

For 5-7 days, choose eSIM 5GB/5 days at 3,102¥ or pocket WiFi 1GB/day at 440¥/day, enough for browsing and maps.

Yes, pocket WiFi supports multiple devices; eSIM/SIM too, but watch fair use to avoid throttling.

Yes if SIM-free and eSIM-compatible (iPhone XS+, recent Samsung); check Docomo/SoftBank specs.

Free cancellation 4 days prior; after that, 100% fee unless with cancellation protection (10%).

Yes, notify 1 day before; extension fees per day depending on plan (440¥+).

Available via Docomo U50; SoftBank 4G/LTE main, throttled to 128kbps after limit.

Company info

Legal name: Vision Inc.

Founders: Kenichi Sano

Address: Tokyo, Japan

Email: [email protected]

Website: https://ninjawifi.com

Support

24/7

Accepted payments

Credit Card, PayPal

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