SIM Cards

Stay connected with our Unlimited-data SIM Cards

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  • Choose from flexible short-term plans to economical long-term plans.
    Enjoy the best value depending on how long you're travelling.
  • Truly unlimited High-speed LTE data.
    With download speeds up to 150 Mbps [?]
  • Runs on Japan's well-known Docomo network
    Powerful network with excellent coverage throughout Japan
  • No return necessary
    Once you’re done with the card, just throw it away, or keep it as a memory of your amazing time in Japan :)
Free Shipping
Airport pickup / Hotel delivery available
Simple Setup - No activation.
Install and go!
Unlimited blue
Unlimited data.
No Cutoff!
Price blue
More affordable prices compared to the competition
Service blue
24/7 Native English Support helpline

Unlimited SIM Cards for power users.

Unlimited LTE data that lets you to stream HD video, cloud-sync all your photos, video call loved ones are more.
Conveniently available in blocks of 6-days to offer the best bang for your buck no matter how long your trip is.

Subject to Docomo’s “Fair Use Policy” - See Terms of Service for more info.

Sim six
$ 46
Sim twelve
$ 60
Sim eighteen
$ 75
Sim twenty four
$ 87
Sim thirty
$ 98

Set-data SIM Cards for light users.

Ideal for users with minimal data needs who just need to stay connected on the go.
Fallback to 3G speeds after exhausting LTE quota.

$ 20

2GB total LTE allowance

$ 48

4GB total LTE allowance

$ 59

8GB total LTE allowance

Reviews for JapanWifiBuddy SIM Cards

28 reviews
5 25
4 1
3 2
2 0
1 0

DARWIN G. | | 6-day Unlimited SIM Card | 25 June 2019
Sim card
I have t mobile in the states and not all apps worked over there with the internet ,this sim card made it all happen I loved it

XIANG W. | | 6-day Unlimited SIM Card | 25 June 2019
Excellent Service
Overall it was excellent service. Only issue, instruction was not clear to an iPhone 6 +, it was not able to connect to network

karim D. | | 12-day Unlimited SIM Card | 25 June 2019
Everything was good
Everything was good

AMELIA B. | | 18-day Unlimited SIM Card | 25 June 2019
Worked great
Only thing that confused me was I was picking up the sim cards from a post office at the airport, not a Japan wifi buddy office. Instructions to set up for android were slightly different than how my Google pixel actually worked, but it was still super easy. The data was always super fast and I used it a lot. Would buy a sim card here again.

MICHAEL C. | | 12-day Unlimited SIM Card | 25 June 2019
Worked exactly as anticipated
I have no criticism. The sim cards were delivered to the airport post office as expected and the sim cards themselves performed to spec. Would buy again.

  • Requires a SIM Unlocked device. If your device is locked, please contact your carrier to unlock it.
  • We include thorough instructions, but swapping SIM cards requires some knowledge on your specific device, including access to optional tools that might be needed. Please look into setup for your specific device before leaving home for Japan.
  • Each card is available in nano size, making it compatible with almost all recent tablet and smart phone models. Please ensure your device supports this format or optionally purchase an adapter from us.
  • LTE/3G bands used:
    LTE: 2100MHz/1700MHz/1500MHz/800MHz
    WCDMA/HSDPA/HSUPA: 2100MHz/1700MHz/800MHz
  • These are data-only SIM Cards. Carrier-based voice calls and text messaging are NOT supported. However, data-based messaging and telephony solutions such as Skype, Facetime, Whatsapp, Line etc. are supported.
Got a question? Check out our FAQ.

Not answered there? Shoot us an email and we'll get back to you soon!
Please ensure that your device is compatible with our SIM cards.

JapanWifiBuddy is not responsible if your device has compatibility issues with our SIM Cards.

If you have doubts, please consider renting our Pocket Wifi devices instead, which support all Wifi-enabled devices.