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The Japan Travel Guy

Japan eSIM Guide

Stay connected in Japan without the hassle. Compare the best eSIM providers, learn how to set up, and choose the right plan for your trip.

Updated December 2025 • Prices and plans subject to change

Quick Pick: For most travelers, we recommend Ubigi for reliability or Airalo for value.

Top eSIM Providers Compared

We've tested these providers across multiple Japan trips. Here's what we found.

Ubigi

Best Overall
Data: 1GB - 10GB optionsValidity: 1-30 daysPrice: $9 - $35
Pros: Reliable NTT Docomo network, Easy app setup, Top-ups available, Good speeds
Cons: Slightly pricier, No unlimited options
Best for: Most travelers

Airalo

Best Value
Data: 1GB - 20GB optionsValidity: 7-30 daysPrice: $5 - $42
Pros: Cheapest per GB, Wide plan variety, Multi-country options, Good app
Cons: Speed can vary, Support can be slow
Best for: Budget travelers

Holafly

Best Unlimited
Data: Unlimited (throttled)Validity: 5-90 daysPrice: $19 - $99
Pros: True unlimited data, No top-up needed, Good for heavy users
Cons: Speeds throttled after heavy use, Pricier upfront
Best for: Heavy data users

Nomad

Good Alternative
Data: 1GB - 10GB optionsValidity: 7-30 daysPrice: $8 - $30
Pros: Competitive pricing, Clean app interface, Good reliability
Cons: Fewer plan options, Less known
Best for: Simple setup seekers

Sakura Mobile

Japan Specialist
Data: 3GB - UnlimitedValidity: Up to 365 daysPrice: $25 - $60/month
Pros: Japan-focused, Long-term options, Physical SIM available
Cons: Overkill for short trips, Higher minimums
Best for: Extended stays

How to Set Up Your eSIM

Simple 5-step process. Do this before you leave home.

1

Check eSIM Compatibility

iPhone XS and newer, most recent Android phones. Check your phone settings for 'Add eSIM' option.

2

Purchase Before You Go

Buy your eSIM 24-48 hours before departure. You'll receive a QR code via email.

3

Install the eSIM

Scan the QR code or use the provider's app. This downloads the eSIM profile to your phone.

4

Keep It Off Until Landing

Leave the eSIM line disabled during your flight. Only activate when you land in Japan.

5

Activate in Japan

Enable the eSIM line and turn off your home carrier's data. You should connect automatically.

Common Questions

eSIM vs Pocket WiFi - which is better?

eSIM for solo travelers or couples - simpler, no device to carry. Pocket WiFi for groups of 3+ to share costs, or if your phone doesn't support eSIM.

How much data do I need?

Light use (maps, messaging): 1GB/week. Normal use (social media, photos): 3-5GB/week. Heavy use (video calls, streaming): 10GB+ or unlimited.

Will my phone number still work?

Your home number works for calls/texts via WiFi calling, but not cellular. iMessage and WhatsApp continue normally over data.

Can I use Google Maps offline?

Yes! Download Japan maps before you go. Even with eSIM, offline maps are faster and save data.

What about coverage in rural areas?

eSIMs using Docomo network have excellent coverage, even in countryside. SoftBank-based options may have gaps in remote areas.

Pocket WiFi Alternative

If your phone doesn't support eSIM, or you're traveling in a group.

Japan Wireless

$6-8/day

Airport counters, hotel delivery

Reliable, good English support

WiFi Hire

$5-7/day

Airport, hotel delivery

Budget option, decent coverage

Ninja WiFi

$5-9/day

Airport counters

Good for groups, multiple device connection

Ready to Plan Your Trip?

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