【Latest 2025 Guide】Make Your Japan Trip Comfortable! Complete Guide to eSIM Benefits, Usage, and Setup

Traveling to Japan has become more convenient than ever with eSIM technology. If you want to ensure seamless connectivity from the moment you land at a Japanese airport, getting a Japan eSIM before you arrive is a smart choice. Obtaining an eSIM before arriving in Japan not only saves you the hassle of finding a SIM card vendor at the airport but also helps you avoid potential connectivity issues, allowing you to use high-speed internet automatically as soon as you arrive in Japan.

Why is eSIM the Best Choice for Your Trip to Japan?

Instant Activation Saves Time

There is no need for procedures, collection, or waiting in long lines at airport counters like with Pocket WiFi or physical SIM cards. Simply scan the QR code, and you can connect to the Japanese network immediately.

Dual-SIM for Peace of Mind

You can keep your home country's SIM card or eSIM active and add the Japan eSIM for data communication only. This allows you to receive important calls and SMS from your home country while utilizing an affordable data plan within Japan.

Achieve Hassle-Free Travel

You are freed from the inconvenience of carrying and charging a separate device, such as a Pocket WiFi router. You can enjoy sightseeing smartly with just your smartphone.

In this guide, we will walk you through the process of obtaining a Japan eSIM ahead of time, highlighting the steps, benefits, and considerations to make your journey smooth and hassle-free.

Step 1: Check Your Device Compatibility

Before you purchase an eSIM, it is crucial to ensure that your device supports eSIM. Most modern smartphones, including recent models from Apple, Samsung, and Google, are eSIM-compatible. However, it is always a good idea to double-check your device's specifications to confirm compatibility.

To verify if your device supports eSIM, follow these steps:

Go to your device's settings.
Find the section related to mobile networks or cellular settings.
Look for an option to add a new cellular plan or eSIM.

If your device displays an option for eSIM, it is compatible. If not, you may need to consider alternative connectivity options such as a physical SIM card or rental WiFi.

Another way is to dial *#06#.

Open your phone's dialer, and just dial *#06#. A screen with information will appear. If your phone is eSIM-compatible, you will see an EID number in the list.

Please note that on some phones, the list may not be immediately obvious. Ensure you scroll all the way down, as the EID number might also appear as 'EID 2'.

Step 2: Choose a Reliable eSIM Provider

Once you have confirmed your device's compatibility, the next step is to choose a reliable eSIM provider. There are several eSIM providers that offer Japan eSIMs with various data plans and coverage options. When selecting a provider, consider the following factors:

Coverage: Ensure that the provider offers extensive coverage across Japan, including both urban and rural areas.
Data Plans: Compare the available data plans to find one that suits your needs in terms of data allowance, validity period, and cost.
Customer Support: Opt for a provider with good customer support in case you encounter any issues during your trip.

CDJapan Rental's eSIM service is a great option, offering competitive plans and stable coverage nationwide through Japan's leading carrier, NTT Docomo (docomo).

Step 3: Purchase and Activate Your eSIM

After selecting an eSIM provider, you can proceed with the purchase and activation process. Here is a step-by-step guide:

Visit the Provider's Website: Go to the provider's website or app and choose the eSIM plan that fits your needs.
Complete the Purchase: Follow the instructions to complete the purchase, which typically involves entering your personal details and payment information.
Receive eSIM Details: After purchasing, you will receive an eSIM activation code or QR code via email or through the provider's website/app.
Activate the eSIM: Follow the provider's instructions to activate the eSIM on your device. This usually involves scanning the QR code or entering the activation details in your device's settings.

While you can start using a Japan eSIM immediately after purchase, it is generally recommended to purchase it before coming to Japan. With our eSIM, purchasing it in advance is no problem as the usage period does not begin until you activate it. Furthermore, full refunds are possible if you are unable to use the service.

Step 4: Enjoy Seamless Connectivity in Japan

With your eSIM activated, you can now enjoy seamless connectivity throughout your stay in Japan. Whether you are navigating the bustling streets of Tokyo or exploring the serene countryside, your eSIM will keep you connected without the need for physical SIM cards or Pocket WiFi devices.

CDJapan Rental's eSIM service offers reliable coverage through docomo's extensive network, ensuring you stay connected no matter where you go in Japan. Feel free to check CDJapan Rental's eSIM plans and choose the one that best fits your travel needs.

30GB/8 days	Suitable for short-term use, 30GB of data is enough for all daily travel needs.	3,200 JPY
50GB/16days	Ideal for around two weeks of travel, ensuring enough data for daily use and emergencies.	3,900 JPY
50GB/31days	Suitable for longer trips and tourists with higher data needs.	4,900 JPY
135GB/91days	Perfect for tourists who are staying in Japan for a short period or on a working holiday. The eSIM provides data comparable to a WiFi device and can be used for up to 3 months.	10,800 JPY

Experience CDJapan Rental's eSIM Now

FAQ

Q: Is eSIM setup difficult?: A: No, it is very simple. For most providers, setup is completed by simply scanning the QR code from your smartphone's settings. There is absolutely no hassle of swapping out a tiny card like with a physical SIM.
Q: Can I get a refund if the eSIM fails to connect?: A: While refunds are generally not offered by all providers, CDJapan Rental's eSIM allows for a full refund if you have not yet activated the service. You can purchase with peace of mind.
Q: When should I start using the eSIM?: A: The usage period begins the moment the eSIM is installed on your device. Therefore, we recommend setting up and activating the eSIM in a Wi-Fi environment, such as at the airport or your accommodation, just before your departure for Japan.
Q: I'm not sure if my smartphone supports eSIM.: A: As explained in Step 1, please look for the option to "Add a Cellular Plan" in your settings, or dial "*#06#" and check if the EID number is displayed. Most recent Android models (Pixel, Galaxy) and iPhones (XR and later) are compatible.

Getting a Japan eSIM before you arrive is a convenient and efficient way to ensure reliable connectivity throughout your trip. By following the steps outlined in this guide—checking device compatibility, choosing a reliable provider, purchasing and activating your eSIM, and enjoying seamless connectivity—you can make your travel experience in Japan smooth and hassle-free.

Our company offers a range of Japan eSIM products that can be purchased and activated prior to your departure. With our eSIM, you can enjoy high-speed internet throughout your stay in Japan without the need to carry additional devices or swap out physical SIM cards.

For more information on our eSIM offerings and to find the best plan for your needs, visit CDJapan Rental eSIM service page. Safe travels and enjoy your time!