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Stay connected in Japan with Japan eSIM plans from local providers such as au by KDDI while our Smartroam plans connect you to Japan's NTT Docomo network..

Top Seller
Best Value
Top Seller
Top Seller
📡 Japan’s Leading Network: AU by KDDI is one of Japan’s top mobile networks, giving you strong coverage and fast 4G/5G data across all Japanese cities and rural areas.
⚡Quick and Easy Setup: Activate your AU Japan eSIM from Sim Local in just minutes. No physical SIM card, no hassle.
💸 Great Value Unlimited Plans: Get unlimited data with flexible Local eSIM Japan options that make browsing, streaming, and navigating easy, fast & affordable wherever you go.
🚀 More High Data Daily: We offer 10GB of high speed data daily compared to other eSIM providers who will throttle your speeds after 1Gb-3GB use.
🌍 Travel Without Roaming Worries: Enjoy fast and secure service with AU’s Unlimited Data Travel eSIM. Choose plans from 4 to 15 days and stay connected stress free.
🛒 Exclusive with Sim Local: We are the only provider in Europe offering official AU Japan eSIM plans online, giving you trusted access to Japan’s best local network.

Select the destination you’re traveling to and choose your data plan. Remember to check if your mobile device is compatible.
Purchase your plan. Install your eSIM 1 day before the trip and follow our step-by-step instructions to install your eSIM.

When you arrive, you'll connect to the same 4G and 5G networks as the locals!
Many networks advertise “unlimited data” but slow you down after just 3GB or 5GB. At Sim Local, you get up to 10GB of full-speed data daily. No buffering, no lag - just smooth streaming, maps that load, and hassle-free sharing, so your Japan trip stays stress-free.

Curious what you can do with 10GB Daily Data in Japan vs Throttled Speeds?
| Activity/App | High-Speed Data (10GB load time) | Throttled Data (after 3/5GB load time) |
| Smooth playback | 10-30 sec buffer | |
| Smooth playback | 20-60 sec buffer | |
| Scroll smoothly | Constant bufferring | |
| Instant loading & navigation | May not load fully | |
| HD video & audio | Call drops frequently | |
| High-quality audio | Lower quality, skips | |
| Fast browsing & email sync | Partial load, email delays |
An eSIM is a digital SIM that simplifies staying connected while traveling abroad, eliminating the need to swap physical SIM cards. More importantly, it means you can avoid expensive roaming charges. Simply download a plan and connect in a few taps!
Most smartphones today support eSIM technology, but there are still a few models that do not. Easily check if your smartphone or tablet is eSIM-compatible using our compatibility checker.
Sim Local connects you to trusted local networks in 150+ countries. With a plan from a local provider, you can ditch slow and expensive roaming products and unlock the fastest possible internet speeds.
The fastest way to install an eSIM is through the Sim Local app. Download a plan and get online in a couple of minutes!
Getting an eSIM is super easy! Simply purchase a plan online and follow guided instructions in the app (or email sent to your inbox).
You can have multiple active plans (usually up to 10) on your phone and instantly switch between as you travel from country to country. Some devices will limit the number of eSIMs you can store on your phone, so you may need to remove an old eSIM to activate a new one.
We've connected 4 million customers worldwide since 2011. Ready to join them?
We are rated 4.7 stars on Trustpilot by 560+ happy customers.
Need help?
Find answers in our Help Centre or connect with us via WhatsApp or Email.
You can also visit any of our airport stores to talk in person. Check our Store Locator.
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