KDDI (au) Japan eSIM | Unlimited 5G High-Speed Internet | The World's Best Internet Experience
- KDDI (au), the world's leading telecommunications company as rated by Opensignal, provides Japan's mobile network.
- Supports AI tools such as ChatGPT, and unlimited data and speed with 5G high-speed mobile network
- Depending on the number of days purchased, you can enjoy an additional 3GB~21GB of hotspot sharing data
- Easy installation, no need to change SIM card, just scan QR code to activate
—KDDI won first place in the Opensignal 2025 Global Mobile Network Experience Awards in the categories of gaming, voice applications, and network reliability experience—
Package Options
Product Info
The content of this product is provided by machine translation and may not reflect the actual information, please take this into consideration before booking.
Please confirm that your phone is compatible with eSIM before purchasing. Orders cannot be canceled or refunded after ordering.
Before activating eSIM, please update iOS to the latest version and connect to a stable WiFi network. Old iOS versions and unstable networks are common reasons for eSIM activation failure.
Open the camera to scan the eSIM and click "Action Plan".
The activation time is about 2-3 minutes, and the installation may fail if the activation screen pops up.
Customizable eSIM names for easy management of multiple eSIMs
Select the default number to specify the original primary number to receive messages (you need to apply to the original telecom operator to activate the international roaming primary number before you can receive text messages)
You can specify the primary phone number to use iMessage and Facetime functions
If you choose to use eSIM mobile data, "eSIM mobile data is not enabled" is a common reason for not being able to access the Internet.
You can also manually add eSIM when you cannot scan the QR Code
After copying the eSIM activation code, please follow the steps to manually add the eSIM information.
SIM Card Specifications
| Data Usage Specifications | 12GB, 21GB |
| Transmission Specifications | 5G/4G |
| Signal Coverage Area | Japan |
| Mobile Carrier | KDDI |
| Supported Sizes | eSIM |
| Hotspot Sharing | Available |
| Network Type | Local |
Purchase Notice
- After the eSIM is sent, the order cannot be canceled or refunded. Please confirm that the phone can use the eSIM (iPhone and Android phones sold in China, Hong Kong, and Macau do not support the eSIM function; most Android phones sold in Taiwan do not support eSIM)
- For Android phones with eSIM support, please refer toFigures 1 and2 for the steps to manually enter the activation code.
Reminders
Before purchasing, please enter "＊＃０６＃" on your phone's dial pad. If the EID number is displayed, you can use the eSIM.
Please connect to a stable WiFi before activating the eSIM to avoid activation failure due to unstable network. The eSIM cannot be reissued after it expires.
The validity period is calculated when you activate the eSIM upon arrival in Japan. The first day is from the moment of activation to midnight Japan time.
When activating eSIM outside of Japan, it is normal to see "Activating" or "Activation Failed". Once you arrive in Japan, activate the eSIM and use the network.
Hotspot sharing traffic for various plans: 3GB total for 3-4 days, 6GB total for 5-7 days, 9GB total for 8-10 days, and 15GB total for 15 days.
Cancellation Policy
- Once the order has been completed, it cannot be canceled, modified, or refunded
- Due to time zone differences, the confirmed cancellation date is based on the supplier’s local time. Please allow 2–5 business days to process your cancellation request, after which the cancellation fee will be charged according to the product’s cancellation policy. Once the cancellation is confirmed, you will receive your refund within 14 working days.
FAQ
Yes, eSIMs are widely available for tourists visiting Japan, offering a convenient way to stay connected without needing a physical SIM card. Many providers offer various plans tailored for travelers, allowing for easy activation and immediate internet access upon arrival.
The KDDI (au) Japan eSIM is a reliable choice because it operates on KDDI's network, which Opensignal has rated as a world-leading telecommunications company. This ensures robust network reliability, excellent gaming, and voice application experiences. It provides stable and fast internet access across various regions in Japan.
The KDDI (au) Japan eSIM provides unlimited 5G/4G high-speed internet by utilizing KDDI's top-rated mobile network. This ensures nationwide coverage, including major cities like Tokyo, Osaka, Kyoto, and popular tourist destinations such as Hokkaido and Okinawa, delivering a consistent and fast internet experience throughout your journey.
Yes, the KDDI (au) Japan eSIM supports hotspot sharing. Depending on the number of days purchased for your plan, you can enjoy an additional 3GB to 21GB of data specifically allocated for hotspot sharing. This allows you to connect other devices, like laptops or tablets, to your eSIM's internet connection.
The activation process for the KDDI (au) Japan eSIM is straightforward and user-friendly. There's no need to change your physical SIM card; you simply scan a QR code to activate the eSIM. This method allows for easy installation and quick setup, providing immediate access to the internet upon activation.
Absolutely. The KDDI (au) Japan eSIM is fully compatible with popular global social applications such as WhatsApp, LINE, KakaoTalk, Facebook, Telegram, WeChat, Instagram, and TikTok. This ensures you can enjoy seamless text, voice, and video calls, keeping you connected with family and friends effortlessly.
The KDDI (au) Japan eSIM excels in network reliability, especially for gaming and voice calls. KDDI won first place in Opensignal's 2025 Global Mobile Network Experience Awards for gaming, voice applications, and overall network reliability. This ensures a smooth and uninterrupted experience for these activities.
Yes, the KDDI (au) Japan eSIM is designed to remain a top option for future travel, including in 2025. Its use of KDDI's advanced network, consistently recognized by Opensignal for its performance and reliability in categories like 5G high-speed and network experience, indicates its continued suitability for future connectivity needs.
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