Unlimited Data in Japan on KDDI's Local Network
Truly unlimited daily data on Japan's au/KDDI network — from 3 to 31 days. Install before you fly, connect the second you land.
Choose Your Unlimited Plan
Showing 2 of 2 plans
What "Unlimited" Means on KDDI
Our Unlimited plans give you the freedom to stay connected all day - here's exactly how they work.
Full-Speed All Day
Full-speed data all day with no daily cap — always at your best speed.
Always Connected
After your daily high-speed allowance, data continues at 1 Mbps — enough for messaging, maps & calls.
Resets Every Day
Your full high-speed allowance refreshes each day automatically. Start every morning with a full tank.
*Hotspot data may be limited, please review the plan notes for details
Perfect For:
Tourists
Stream maps, translate menus and share photos all day - no topping up. Unlimited data keeps you moving from Tokyo to Kyoto without watching a counter.
Digital Nomads/remote work
Work from any café in Japan on KDDI's fast local network. Video calls, cloud files and hotspot tethering included - enough to run your laptop all day.
Content Creators/streamers
Upload reels, go live and back up footage on the go. Unlimited high-speed data means you never choose between posting and saving your allowance.
Long stays 2–4 weeks
Plans run from 3 up to 31 days, so one eSIM covers your whole trip. Local KDDI coverage nationwide - no roaming fees, no daily reconnecting.
Check Device Compatibility
Find out if your device supports eSIM
Check your phone compatibility
How Does This Work?
Step 1: Choose Your Destination
Select your destination and preferred data package.
Step 2: Get Your Activation Email
Receive an email with your eSIM activation instructions.
Step 3: Scan Your QR Code to Activate
Use the QR code in your email to activate your eSIM instantly.
Step 4: Enjoy Seamless Connectivity
That's it! You're ready to explore the world with reliable mobile data.
Trusted by Travellers Worldwide
“Used it for two weeks across Tokyo, Kyoto and Osaka and never once ran low. Connected the second I landed and the speed on the KDDI network was excellent everywhere, even on the train.”
“I work remotely so unlimited data was the whole point, ran video calls all day with no throttling. The hotspot allowance was plenty for my laptop too. Set-up took five minutes before my flight.”
“So much easier than hunting for a SIM at the airport. Installed it at home, landed in Japan and was online instantly. Will use again on my next trip.”
Frequently Asked Questions
Yes - data on your own device is genuinely unlimited at high speed on KDDI's network, with no daily cap to throttle you. Stream, navigate and video call as much as you like for the length of your plan.
It runs on KDDI (au), one of Japan's three major local carriers. Because it's a local connection rather than international roaming, you get fast, stable speeds and nationwide coverage.
Data on your own device is unlimited. Tethering/hotspot has a separate allowance of about 1 GB less than your plan length - for example, a 10-day plan includes 9 GB of hotspot data.
This is a data-only eSIM, so there's no Japanese phone number for regular calls or SMS. You can still call and message over the internet using apps like WhatsApp, LINE, FaceTime and Zoom.
Plans run from 3 to 31 days. Pick the option that matches your trip - validity is counted in days, so a 10-day plan covers 10 full days of use.
Your validity period begins when the eSIM connects to the network in Japan, not when you install it. Install it before you fly so you're ready to connect the moment you land.
Yes - KDDI provides nationwide coverage, from Tokyo and Osaka to rural areas and the bullet train routes in between.
Most phones from the last few years support eSIM, including recent iPhone, Samsung Galaxy and Google Pixel models. Use the device compatibility checker above to confirm before you buy.
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