During a trip to Japan, there are many opportunities to use your smartphone for map apps, transit guides, translation apps, social media, and hotel or flight reservation confirmations. To enjoy your trip comfortably, it is important to prepare the means of internet communication you will use in Japan before you depart.
The main communication methods available for travel in Japan are "International Roaming," "Rental Wi-Fi," "SIM Cards," and "Japan eSIM." Since the costs, setup methods, and portability requirements differ, choose the method that suits the number of days and people traveling.
Communication Methods Available for Travel in Japan
1. International Roaming
International roaming is a method of using the same mobile phone service you have contracted with your current carrier while in Japan. It is easy to use since there is no need to change SIM cards or set up new communication services.
On the other hand, depending on your contract, communication fees may be high, or there may be limits on daily data capacity. If you frequently use video streaming or social media, be sure to check the fees, data capacity, and speed limits before you depart.
2. Rental Wi-Fi
Rental Wi-Fi is a communication method that allows you to connect your smartphone to a portable Wi-Fi router. Since multiple devices can connect to one router, it is suitable for family or group travel.
However, you need to carry the Wi-Fi router with you at all times during your trip. If the router runs out of battery, you will lose your connection, and you will need to go through the process of picking it up and returning it.
Also, be aware that if you separate from the person carrying the router, others will not be able to connect to the internet.
3. SIM Card
A SIM card is a method of using a physical SIM card for Japan by inserting it into your smartphone. You can purchase it at Japanese airports, electronics stores, or online shops.
The advantage is that it can be used even on smartphones that do not support eSIM, but it requires the process of changing the SIM card. You need to remove your regular SIM card, so be sure to keep it safe to avoid losing it.
Some products may require APN settings, so check the setup methods and compatible devices before purchasing.
4. Japan eSIM
More people are using the Japan eSIM as a communication method for their trips to Japan, which can be purchased online. eSIM is a digital SIM built into the smartphone, allowing you to add a communication plan without swapping out a physical SIM card.
You can start using it by scanning the QR code you receive after purchase and completing the necessary settings. There is no need to pick up the product at the airport or store, and you do not have to return a Wi-Fi router.
If you complete the purchase and setup before departure, you can activate the line upon arrival in Japan and immediately use Google Maps or transit guides.
If you are using it for the first time, please check the available models on the list of eSIM-compatible devices before purchasing. For setup methods, refer to the eSIM setup guide.
Comparison of Communication Methods for Travel in Japan
Each communication method has its advantages and disadvantages. It is important to compare not only the costs but also the ease of setup, portability, and whether pickup and return are required.
| Communication Method | Ease of Setup | Items to Bring | Pickup/Return | Recommended Users |
|---|---|---|---|---|
| International Roaming | ★★★★★ | None | None | Those who prioritize convenience for a short period |
| Rental Wi-Fi | ★★★★☆ | Wi-Fi Router | Required | Family or group travel |
| SIM Card | ★★★☆☆ | SIM Card | Varies by product | Those using devices that do not support eSIM |
| Japan eSIM | ★★★★★ | None | None | Solo travelers, business trips, temporary returns |
Reasons to Recommend eSIM for Travel in Japan
During a trip to Japan, there are many situations where you want to use Google Maps, transit guides, translation apps, etc., immediately after arriving at the airport. With Japan eSIM, you can start communication immediately upon arrival in Japan by completing the purchase and setup before departure.
Available for Online Purchase
Japan eSIM can be purchased online, so there is no need to search for a SIM card at the airport or store. After purchase, you can set it up using the QR code that arrives via email or other means.
No Need to Swap SIM Cards
eSIM is a system that adds a communication plan to the smartphone itself. Since you do not need to remove your regular SIM card, you can reduce the worry of losing it.
No Pickup or Return Required
There is no need to pick up or return a device at the airport or hotel like with rental Wi-Fi. It is also suitable for solo travelers or business trips who do not want to increase their luggage.
Choose a Plan that Fits Your Travel Duration
Japan eSIM offers various plans for different durations and data capacities, from short trips to long stays. You can choose according to your travel duration and purpose, so you do not have to purchase more capacity than necessary.
For information on how to choose the duration and data capacity, please check how to choose Japan eSIM pricing plans.
Recommended Communication Methods by Travel Style
Japan eSIM for Solo Travelers
For solo travelers, Japan eSIM is convenient as it can be used solely on your smartphone. There is no need to carry a Wi-Fi router, and you avoid the hassle of charging or returning it.
Rental Wi-Fi for Family or Group Travel
If family or friends are always traveling together, rental Wi-Fi that can be shared among multiple devices is also an option.
However, if there is a possibility of separating during the trip, it is easier to stay in touch if each person has their own eSIM or SIM card.
Japan eSIM for Business Trips
On business trips, a communication environment that allows you to use email and online services immediately upon arrival in Japan is necessary. Japan eSIM, which does not require pickup or return, is also suitable for short business trips.
If you plan to connect your computer to the internet, make sure the plan you purchase supports tethering.
eSIM with a Duration that Fits Temporary Returns
For temporary returns, it is important to choose a plan that fits your stay duration, whether it is a few days or a few weeks. If you only need data communication, using Japan eSIM can reduce the burden of preparation and setup.
If you need a Japanese phone number or SMS, consider a phone number eSIM instead of a data-only plan.
What Data Capacity is Needed for a Trip to Japan?
The data capacity needed for a trip to Japan varies depending on how you use your smartphone. If you mainly use maps, transit guides, messaging, and browsing social media, you can manage with relatively low capacity.
On the other hand, if you use video streaming, video calls, posting videos on social media, or tethering, you will need a larger data capacity.
| Main Usage | Daily Estimate |
|---|---|
| Maps, Transit Guides, Messaging | About 500MB to 1GB |
| Maps, Social Media, Web Searches | About 1GB to 2GB |
| Using Video or Video Calls | 3GB or more |
| Frequent Tethering or Video Use | Large Capacity or Unlimited Plan |
For detailed estimates of data usage, please refer to data usage estimates.
Points to Check Before Purchasing Japan eSIM
Before purchasing Japan eSIM, be sure to check the device and plan usage conditions.
- Is your smartphone compatible with eSIM?
- Is the SIM lock removed?
- Is Japan included in the service area?
- Is the usage period suitable for your travel duration?
- Is the necessary data capacity included?
- Can you use tethering?
- When does the usage period start?
- Is it compatible with phone numbers and SMS?
- Can you receive support if issues arise?
The flow from purchasing Japan eSIM to setup and starting use is explained in detail in the complete guide to Japan eSIM.
If eSIM Does Not Connect After Arriving in Japan
If you cannot connect to eSIM after arriving in Japan, please check the following settings in order.
- Is the Japan eSIM line ON?
- Is Japan eSIM selected for mobile data communication?
- Is data roaming ON?
- Is airplane mode OFF?
- Are the APN settings correct?
- Have you restarted your smartphone?
For detailed troubleshooting methods, please refer to how to troubleshoot if Japan eSIM does not connect.
If the issue persists after checking the settings, prepare your order number, device name, OS, and settings screen, and contact Japan eSIM support.
Frequently Asked Questions
Can eSIM be used on any smartphone?
No. It can only be used on smartphones that support eSIM. Please check the list of eSIM-compatible devices for supported models.
Is setting up eSIM difficult?
Most eSIMs are set up by scanning the QR code that arrives after purchase with your smartphone. The setup screens differ between iPhone and Android, so please refer to the eSIM setup guide for detailed steps.
When should I set up Japan eSIM?
Basically, it is recommended to add eSIM in a stable Wi-Fi environment before departure and turn on the line and data roaming after arriving in Japan.
However, depending on the plan, the usage period may start from the time you scan the QR code or connect to the network. Be sure to check the usage start conditions for the plan you purchased.
Can I use a phone number with eSIM?
With the data-only Japan eSIM, you may not be able to use regular phone numbers for calls or SMS.
Internet calls via LINE or WhatsApp can be used if data communication is available. If you need regular calls or SMS, please check the phone number eSIM plan.
Can I travel in Japan using only free Wi-Fi?
You may be able to use free Wi-Fi at hotels, airports, and cafes. However, you may not be able to connect while moving or outdoors, so if you frequently use maps or transit guides, it is advisable to prepare eSIM or SIM cards for peace of mind.
Which is better, eSIM or rental Wi-Fi?
For solo travel or business trips, eSIM is convenient as it does not require carrying or returning a device. For family or groups traveling together, rental Wi-Fi that can be shared among multiple people is also suitable.
For other questions, please check the frequently asked questions about eSIM.
Conclusion
The methods for using the internet during a trip to Japan include international roaming, rental Wi-Fi, SIM cards, and Japan eSIM.
International roaming is easy to set up, rental Wi-Fi is easy to share among multiple people, and SIM cards can be used on devices that do not support eSIM.
Among these, Japan eSIM is advantageous because it can be purchased online, and there is no need to swap SIM cards, pick up products, or return devices. If you prepare in advance, you can start communication immediately upon arrival in Japan, making it a versatile communication method for solo travel, business trips, and temporary returns.
Check not only the costs but also the travel duration, number of users, required data capacity, compatible devices, and the need for phone numbers or SMS, and choose the communication method that fits your travel style.
JAPAN&GLOBAL eSIM offers plans that can be selected according to the duration and data capacity of your trip to Japan. For detailed product information, please check the Japan eSIM product and pricing plans.
