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KDDI 5G is Japan’s cutting-edge mobile network, delivering ultra-fast speeds, enhanced capacity, and low latency for a superior user experience. Available in major cities and top tourist destinations, KDDI’s 5G network provides seamless connectivity for activities like streaming, gaming, and video calls. With Japan’s largest number of Sub6 base stations, KDDI ensures reliable, high-speed 5G coverage across urban and rural areas, making it a top choice for both residents and travelers looking for the best mobile network experience.
Unlike other providers, we offer true unlimited speed throughout your entire usage. Enjoy uninterrupted, blazing-fast 5G connectivity, with speeds reaching up to 871Mbps for an exceptional experience.
You can purchase the Japan KDDI Unlimited eSIM in advance, but your data usage only begins when you connect to KDDI’s network in Japan. Please note that a day is counted from 00:00 based on Japanese time. For example, if you activate the eSIM at 22:00, once it reaches 00:00, it will be counted as one full day.
Yes, mobile hotspot (tethering) is supported. Hotspot data is separate from your on-device unlimited data and varies by plan duration:
| Plan (days) | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| Hotspot (GB) | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Plan (days) | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 25 | 31 |
| Hotspot (GB) | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 24 | 30 |
If your eSIM order hasn't been activated, you are eligible for a full refund. Additionally, if you experience no service upon arrival and replacing the QR code doesn't resolve the issue, you are also entitled to a refund. Please contact our customer support for assistance.
Since the Japan KDDI Unlimited eSIM is anonymous, it cannot be renewed or extended. We recommend purchasing a new eSIM to continue using data.
No, the Japan KDDI 5G Unlimited eSIM is a data-only plan and does not include phone calls, SMS, or a local mobile number. This plan is specifically designed for high-speed 5G data usage.
You can enjoy Free au WiFi at a variety of popular locations across Japan. To find specific areas, check the official au WiFi Zone map here: au WiFi Zone.
Common au Free WiFi Locations include:
Pro Tip: Always look for the "au WiFi" network name on your device, and follow the on-screen instructions to connect effortlessly. No au subscription? No problem! Visitors can register and enjoy temporary access.
Unlike other roaming eSIMs (such as those roaming from Hong Kong to Japan), this is a native Japan KDDI eSIM, so it provides a Japanese IP address.
5G Blazing Fast
