SIM Cards

Stay connected with our Unlimited-data SIM Cards

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Sim reverse
  • Choose from plans with 8 / 15 / 30 days validity
    Enjoy the best value depending on how long you're travelling.
  • Generous 4G/LTE data allowance
    With download speeds up to 150 Mbps [?]
  • Enjoy unlimited 3G speeds after exhausting 4G/LTE limit
    Other company’s cards cut you off when data allowance is consumed, which may leave you stranded!
  • 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


WifiBuddy SIM Card
  • 2GB LTE Data allowance
  • Unlimited 3G Data
  • Speeds up to 150Mbps
  • Up to 99%+ coverage of Japan
$ 20

Most Popular


WifiBuddy SIM Card
  • 4GB LTE Data allowance
  • Unlimited 3G Data
  • Speeds up to 150Mbps
  • Up to 99%+ coverage of Japan
$ 32


WifiBuddy SIM Card
  • 215 MB/day LTE Data (6.45GB total)
  • Unlimited 3G Data
  • Speeds up to 150Mbps
  • Up to 99%+ coverage of Japan
$ 42

All prices are in USD

  • 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.