KDDI Japan eSIM For 5 Days

KDDI Japan eSIM for 5 Days (Unlimited Max Speed Data + 4GB Tethering)

The KDDI Japan eSIM is your premium digital solution for a 5-day, intensely connected trip to Japan. Designed for 5 days of unrestricted, lightning-fast internet access, this prepaid eSIM provides unlimited data at maximum 4G/5G speeds, ensuring you can effortlessly navigate, stream high-definition content, make crystal-clear video calls, share large files, and stay perfectly in sync with your digital life. Leveraging KDDI's extensive and top-tier network, it guarantees robust coverage and blistering performance across Japan. Furthermore, with a generous 4GB included for tethering, you have ample capacity to share your blazing-fast connection with travel companions, laptops, or tablets. Enjoy a fast setup and truly seamless, high-speed connectivity, making your Japanese adventure truly unforgettable and completely connected.

Key Features at a Glance

Why Get This KDDI Japan eSIM for Your Next Trip?

For travelers demanding the very best in speed and capacity during their Japan visit, this KDDI Japan eSIM offers an unparalleled combination of performance, flexibility, and value.

• Blazing-Fast Unlimited Data: Experience the true power of unlimited data at maximum available 4G/5G speeds. This means no compromises when it comes to high-definition video streaming, online gaming, rapid file downloads, real-time video conferencing, or effortlessly navigating complex city environments. It's designed for users who expect top-tier performance without data caps. Note: As with most unlimited plans, a Fair Usage Policy (FUP) applies, typically allowing a very generous amount of high-speed data per day (e.g., 20GB-30GB) before speeds may be temporarily managed for network fairness, resetting each day.

• Generous Tethering Capacity: The inclusion of 4GB for tethering is a significant advantage, providing ample data to share your high-speed connection with multiple devices or travel partners. It’s perfect for keeping a laptop connected for work or ensuring everyone in your group has internet access.

• Optimal for Medium-Length Stays: A 5-day validity period is ideal for a more comprehensive city exploration, a multi-region itinerary, or a focused business trip where continuous high-speed access is critical without committing to a longer plan.

• Fast Setup, Immediate Connection: As a purely digital service, activation is instant.¹ You receive a QR code via email immediately after purchase. This eliminates the need to seek out local stores, navigate language barriers, or physically handle SIM cards, ensuring you're connected from the moment you arrive.

• Backed by KDDI's Premier Network: KDDI is one of Japan's leading telecommunication providers, renowned for its extensive coverage, advanced 4G/5G infrastructure, and reliable service quality.² You can trust this eSIM to deliver strong, consistent performance across major cities, popular tourist destinations, and inter-city travel routes.

• Maintain Your Home Number: Since the eSIM installs digitally, your primary physical SIM remains in your phone.³ This allows you to keep your home phone number active for crucial two-factor authentication or essential calls while relying on the eSIM for all your data needs.

How to Activate the KDDI Japan eSIM

Activating your KDDI Japan eSIM is a quick, three-step digital process that can be completed from the convenience of your home or hotel lobby (ensure you have a stable Wi-Fi connection for the initial installation):

1. Purchase and Receive QR Code: After purchasing the plan, check your email for the confirmation, which will contain your unique eSIM QR code and installation details.

2. Install the eSIM Profile: On your compatible smartphone (iPhone XS/XR and later, Samsung Galaxy S20 series and newer, Google Pixel 3 series and newer), go to your cellular or mobile settings and select the option to "Add Cellular Plan" or "Add eSIM." Use your phone’s camera to scan the QR code you received in the email.⁴

3. Activate Data Roaming at Destination: Once installed, the profile will download. Give the eSIM a clear, travel-friendly name (e.g., "Japan KDDI Max"). Crucially, when you arrive in Japan, switch your data line to the newly installed KDDI eSIM and ensure Data Roaming is turned ON for the new line in your phone settings to initiate service.

Frequently Asked Questions (FAQ)

What does "Unlimited internet at max speed" mean, and what is the Fair Usage Policy (FUP)?

"Max speed" means you will access the fastest available 4G or 5G speeds on the KDDI network. "Unlimited" means you won't be cut off. However, a Fair Usage Policy (FUP) applies to prevent network abuse and ensure fair access for all users.5 This typically allows for a very generous amount of high-speed data per day (e.g., 20GB to 30GB). If this daily threshold is exceeded, speeds may be temporarily managed (reduced) until the next 24-hour cycle begins, when full speeds are restored. This policy ensures continuous, reliable service for everyone.

Is my smartphone compatible with this eSIM?

This eSIM is compatible with most modern, unlocked smartphones that support eSIM technology. This includes iPhone XS/XR and later, Samsung Galaxy S20 series and newer, and Google Pixel 3 series and newer. Please verify your device's eSIM capability before purchasing.

Does the eSIM include a local phone number or calling minutes?

This KDDI Japan eSIM is designed for data and tethering only. It does not include a local Japanese phone number for receiving or making traditional calls/SMS. For voice communication, you should rely on internet-based calling apps like WhatsApp, LINE, Skype, or FaceTime using the provided data.

What happens if I use all 4GB of tethering data?

Once the 4GB tethering allowance is used up, tethering will either stop working or its speed will be significantly reduced for the remainder of the 5-day validity period. The main device's unlimited max speed data will continue to function as per the FUP without being affected. This plan does not offer options to top-up tethering data.