Does whatsapp work in Japan ? with eSIM?
Updated : 2025-07-04 15:15:56
Planning a trip to Japan and concerned about staying connected during your visit? Smooth communication in an unfamiliar place can significantly impact your travel experience. You might be wondering if you can use WhatsApp, which you’re used to for keeping in touch with family and friends, and how much data it might require. This article will explain how to comfortably use WhatsApp in Japan and highlight the benefits of utilizing an eSIM.
To ensure stable communication during your stay in Japan, you’ll need to rent a pocket Wi-Fi device or purchase a SIM card or eSIM. Renting a pocket Wi-Fi device is very convenient when traveling with family or friends, as it allows multiple devices to connect to the internet. However, eSIMs have recently become quite popular.
Can I use WhatsApp during my stay in Japan?
The answer is yes, you can use WhatsApp without any issues during your stay in Japan. All basic functions, including sending and receiving messages, voice and video calls, and group chats, are available without restrictions.
WhatsApp does not require a phone number for free voice and video calls. However, WhatsApp must already be installed on your smartphone, and the phone number must be authenticated. Make sure to complete WhatsApp's authentication before coming to Japan. As long as you have an internet connection, you can use WhatsApp. Even if you remove your physical SIM card or switch to an eSIM for use in Japan, you can continue using your WhatsApp account created with the number you used for authentication.
WhatsApp Call (International Call) Charges
WhatsApp calls are free, whether domestic or international. WhatsApp calls use VoIP (Voice over Internet Protocol), meaning they are made via data transmission over the internet, so you won't incur regular phone call charges.
Receiving Calls
With WhatsApp, you can receive calls from anywhere in the world. Even if you're in Japan, you can receive calls from family or friends abroad. The recipient must be connected to the internet, and the caller must also be using WhatsApp.
Important Notes
VoIP Usage
WhatsApp calls use VoIP (Voice over Internet Protocol), so they cannot connect to regular phone lines (landlines or mobile phone numbers that are not on WhatsApp).
Be Mindful of Data Usage
Long voice or video calls consume a significant amount of data, so it's essential to use WhatsApp over a Wi-Fi connection whenever possible to manage your data usage.
Consider a Large Data Plan
If you anticipate needing to make frequent or long calls during your stay in Japan, it's advisable to purchase an eSIM with a generous data plan or rent a mobile Wi-Fi router for stable communication.
WhatsApp Data Usage in Japan
Here's a summary of the estimated data usage for different WhatsApp features when using an eSIM for communication in Japan. This can help you choose the right data plan.
| Feature | Data Usage | Notes |
|---|---|---|
| Text Messages | Approx. 1KB / message (without media) | Minimal data consumption; negligible impact even if you send hundreds of messages. |
| Voice Calls | 0.15MB - 0.5MB / min (150KB - 500KB) | Uses less data than video calls and provides stable voice communication. |
| Video Calls | 3MB - 6MB / min | Consumes the most data; usage increases further with high-resolution settings. |
| Media Sharing |
Images: 50KB - 500KB / image Videos: 500KB - 2MB / min (depending on resolution) Audio Files: 100KB - 1MB / min |
Data usage varies significantly based on file size and resolution. Videos consume the most data. |
| Background Data | Approx. 1KB / 24 hours | Minimal data usage when the app is running in the background. |
Data Usage Needed for a 1-Hour Video Call
Video calls consume the most data among WhatsApp features. For instance, here's the estimated data usage for a 1-hour video call:
| Feature | Data Usage (Per Hour) |
|---|---|
| Video Calls | 180MB - 360MB |
Benefits of Using an eSIM for WhatsApp in Japan
If you want to comfortably use WhatsApp during your trip to Japan, leveraging an eSIM is incredibly convenient. An eSIM will likely be an ideal choice for many travelers.
No Physical SIM Card Needed for Easy Setup
Since an eSIM doesn't require a physical SIM card swap, there's no risk of losing a small SIM card, and the installation process is hassle-free.
Instant Activation Available
You can purchase and set up an eSIM online, allowing you to start data communication immediately upon arrival in Japan. This saves you the time and effort of buying a SIM card at the airport.
Can Be Used Alongside Your Existing SIM
You can keep your existing SIM card as your primary line (e.g., for your home country's phone number) while adding an eSIM specifically for data communication. This means you can maintain your usual phone number while covering your data needs in Japan.
Optimized for Continuous WhatsApp Use
By connecting to the internet via an eSIM, you can use WhatsApp for messages and calls as usual throughout your stay in Japan. Your authenticated WhatsApp account will continue to work seamlessly.
Transparent Pricing and Easy Management
Opting for a prepaid eSIM allows you to clearly understand the data capacity and cost upfront. This helps avoid unexpected high charges and makes budget management easy.
Main WhatsApp Features Available in Japan
All major communication features of WhatsApp are available during your stay in Japan. You can use the functions you're accustomed to without any issues.
Text Messages
Both one-on-one and group text chats can be carried out smoothly.
Voice Calls
High-quality, free voice calls are available via the internet. You can talk with friends around the world with clear audio while in Japan.
Video Calls
Free video calls are available via the internet. This is convenient for sharing Japan's beautiful scenery in real-time.
Group Chats
Group chats with up to 2,000 participants are available, useful for coordinating with travel companions or sharing information with family.
Media Sharing
You can easily send and receive photos, videos, and necessary documents taken during your trip.
Status (formerly "Status Updates")
This feature allows you to share short photos and videos that automatically disappear after 24 hours. Feel free to share your travel moments.
End-to-End Encryption
Messages and call content are end-to-end encrypted, ensuring privacy and confidentiality.
WhatsApp Business
Business account features (such as catalog display and automated responses) are also available, which can be utilized for business communications.
WhatsApp Features Not Available in Japan
Since WhatsApp operates globally, some region-specific features are not available in Japan. These primarily relate to payment functions.
WhatsApp Pay (Payment Feature)
This feature is not available in Japan. It is offered in countries such as Brazil, India, and Singapore (for business accounts).
UPI Payment Integration
UPI (Unified Payments Interface) integration within India is not available in Japan.
Certain Business Payment Options
Specific country-based business payment features, such as direct bank account transfers, are not supported in Japan.
In Japan, the main communication features of WhatsApp, such as messaging, calling, and group chats, can be used without any issues. While some payment features like WhatsApp Pay are not available, it functions as a communication tool without restrictions, just as you're used to. When traveling to Japan, consider data usage and stability, and **definitely leverage a convenient eSIM for communication in Japan to comfortably use WhatsApp and create wonderful travel memories.**