Immediately after arriving in Japan, there are many situations where you will use your smartphone, such as searching for routes from the airport to the hotel, checking train and bus transfer information, using translation apps, contacting family, and confirming hotel and flight information.
However, if you do not prepare a means of communication that can be used in Japan, you may find it difficult to connect to the internet immediately after arrival, which can complicate your travel and communication.
Methods to use the internet immediately after arriving in Japan include eSIM, SIM cards, rental Wi-Fi, international roaming, and free Wi-Fi at the airport.
This article will clearly explain how to use the internet immediately after arriving in Japan and the Japan eSIM that you should prepare before your trip.
If you want to summarize how to choose and set up a Japan eSIM, please also check the Complete Guide to Japan eSIM.
Situations Where You Need the Internet Immediately After Arriving in Japan
There are many situations where you will need the internet right after arriving at a Japanese airport.
- Searching for routes from the airport to the hotel
- Checking train and bus transfer information
- Contacting family and friends to inform them of your arrival
- Using translation apps
- Confirming hotel and flight reservation information
- Using map apps and ride-hailing apps
- Searching for restaurants and tourist spots
Especially for those visiting Japan for the first time, it is important to prepare an environment where you can use your smartphone immediately after arrival.
How to Use the Internet After Arriving in Japan
The main communication methods available for your trip to Japan are as follows.
| Communication Method | Usage After Arrival | Pickup | Features |
|---|---|---|---|
| eSIM | Easy to use immediately | Not required | Can be purchased and set up online before the trip |
| SIM Card | Available after replacement | May be required | Requires physical SIM card replacement |
| Rental Wi-Fi | Available after pickup | Required | Easy to share among multiple people or devices |
| International Roaming | Available after setup | Not required | Fees vary by the carrier you are contracted with |
| Free Wi-Fi | Only in designated areas | Not required | Limited to places like airports and hotels |
If you want to start communicating immediately after arriving in Japan, eSIM, which can be purchased and set up before your trip, is convenient.
Is Free Wi-Fi at the Airport Enough?
Major airports in Japan may offer free Wi-Fi. It is convenient for sending messages or checking hotel reservation information immediately after arrival.
However, there are some points to be aware of regarding airport free Wi-Fi.
- Available only in certain areas within the airport
- Cannot be used once you leave the airport
- Connection speed may slow down during busy times
- Registration with an email address may be required upon connection
- May require reconnection after a certain period
If you want to use maps or transfer information from the airport to the hotel, relying solely on free Wi-Fi may not be sufficient. If you want to use the internet while moving, it is advisable to prepare an eSIM or SIM card.
If You Want to Use the Internet Immediately After Arriving, eSIM is Recommended
eSIM is a communication method that utilizes the SIM functionality built into the smartphone itself. There is no need to replace a physical SIM card; you can add it to your smartphone using the QR code or setup information that you receive after purchase.
If you complete the addition of the eSIM before your trip, you can connect to the internet by turning on the eSIM line after arriving in Japan.
No Need to Search for a SIM Card at the Airport
Since eSIM can be purchased online, there is no need to search for a SIM card at the airport after arriving in Japan.
After completing immigration procedures, you can start moving without waiting in line to purchase a SIM card.
No Need to Pick Up or Return a Wi-Fi Router
Unlike rental Wi-Fi, there is no need to pick up a dedicated device at the airport or hotel or return it after your trip.
You can enjoy your trip to Japan without increasing your luggage since it can be used with just your smartphone.
No Need to Replace SIM Cards
Since you do not need to remove your currently used physical SIM card, you can reduce the risk of losing your SIM card.
You also do not need to manage small SIM cards or SIM pins during your trip.
Choose a Plan Based on Your Travel Duration
You can choose a plan based on your travel duration and data usage, whether for a short trip, temporary return, business trip, or long stay.
You can check the plans available for your trip to Japan at Japan eSIM Products and Pricing Plans.
Steps to Prepare Japan eSIM Before Your Trip
To use the internet immediately after arriving in Japan, it is important to purchase and set up the eSIM before departure.
- Check if your smartphone supports eSIM
- Purchase a Japan eSIM that matches your travel duration and data capacity
- Check the QR code or setup information sent to your email
- Add the eSIM to your smartphone in a stable Wi-Fi environment
- Turn on the eSIM line after arriving in Japan
- Select the Japan eSIM for mobile data communication
For detailed setup methods for iPhone and Android, please check the eSIM Setup Guide.
Things to Check Before Purchasing eSIM
Is Your Smartphone Compatible with eSIM?
eSIM is not available on all smartphones. Even for the same model, compatibility may vary depending on the country of purchase and the carrier.
Before purchasing, check if your smartphone is compatible on the List of eSIM-Compatible Devices.
Is the SIM Lock Unlocked?
If your smartphone has a SIM lock, you may not be able to use eSIM from other carriers.
Before departure, check the SIM lock status from your current carrier or the device's settings screen.
Is There a Stable Wi-Fi Environment?
Downloading and adding eSIM may require an internet connection.
It is safer to set it up in a stable Wi-Fi environment, such as at home or in a hotel, rather than after arriving at the airport.
Do You Have an Environment to Scan the QR Code?
For eSIM setup, you may need to scan a QR code with your smartphone.
It will be easier to set up if you display the QR code on a computer or another smartphone or print it out.
Check the Conditions for Starting Use
With eSIM, the timing for the start of the usage period may differ depending on whether it starts at the time of purchase, when added to the device, or when connected to a Japanese line.
Check the instructions that arrive after purchase and follow the specified steps for setup.
How to Turn On eSIM After Arriving in Japan
If you have added the eSIM before your trip, you will switch the line from your smartphone's mobile communication settings after arriving in Japan.
- Open "Settings" on your smartphone
- Open mobile communication or SIM settings
- Turn on the eSIM for your trip to Japan
- Select the Japan eSIM for mobile data communication
- Turn on data roaming if necessary
- Open a browser or map app to check the connection
The names of the settings screens may vary depending on the iPhone, Android, or manufacturer of the device.
For detailed steps, please refer to the eSIM Setup Method.
How Much Data Capacity Do You Need for Your Trip to Japan?
The required data capacity varies depending on the apps you will use and how you will use them during your trip.
| Main Usage | Data Usage | Recommended Plan |
|---|---|---|
| Maps, transfer information, messaging | Low | Small capacity plan |
| Web search, social media, photo posting | Normal | Medium capacity plan |
| Video viewing, video calls | High | Large capacity plan |
| Tethering, work use | Very high | Large capacity or unlimited plan |
If your main usage is maps and messaging, it will be easier to keep data usage low.
On the other hand, if you plan to post videos on social media, watch YouTube, make video calls, or use tethering, consider a large capacity or unlimited plan.
For more details, please check the Estimated Data Usage.
If You Cannot Connect to the Internet After Arriving in Japan
If you have set up the eSIM but cannot connect to the internet, please check the following items.
- Is the Japan travel eSIM turned on?
- Is the correct eSIM selected for mobile data communication?
- Is data roaming turned on?
- Is airplane mode off?
- Is the APN setting correct?
- Have you restarted your smartphone?
- Has the validity period of the eSIM started?
- Are you within a usable area?
For detailed troubleshooting methods, please refer to Troubleshooting When eSIM Cannot Connect.
Points to Note When Purchasing eSIM After Arriving in Japan
If you have an internet connection, you can purchase eSIM even after arriving in Japan.
However, the following issues may arise.
- Cannot connect to the airport's free Wi-Fi
- Slow Wi-Fi connection speed
- Setting up eSIM may take time
- Cannot display the QR code on another device
- Need to set it up while moving
If you want to use maps or transfer information immediately after arriving, it is recommended to purchase and set up the eSIM before your trip.
What to Do If You Need a Phone Number?
Many eSIMs for travel to Japan are data-only plans for internet use.
With data-only plans, you can use app calls like LINE, WhatsApp, and Messenger, but you may not be able to make regular calls or send SMS using a standard phone number.
If you need a Japanese phone number or SMS verification, please check the eSIM Plans with Phone Numbers.
Frequently Asked Questions
Can I purchase eSIM after arriving in Japan?
If you have an internet connection, you can purchase eSIM even after arriving in Japan.
However, since the airport's free Wi-Fi may be unstable, it is safer to purchase and set it up before your trip if you want to use it immediately after arrival.
When should I set up Japan eSIM?
It is recommended to add the eSIM in a stable Wi-Fi environment before departure and turn on the line after arriving in Japan.
The timing for starting use may vary by product, so please check the instructions that arrive after purchase.
Can I use eSIM immediately after arriving in Japan?
If you have completed the addition of eSIM to a compatible device and the necessary settings, you can turn on the line and use it after arriving in Japan.
If you cannot connect, please check mobile data communication, data roaming, and APN settings.
Is Wi-Fi necessary for eSIM setup?
A stable internet connection may be required when downloading or adding eSIM.
It is recommended to set it up in a Wi-Fi environment at home or in a hotel before departure.
Do I need to remove my current SIM card?
Typically, you do not need to remove your current physical SIM card to use eSIM.
However, to avoid high international roaming charges, please switch the line used for mobile data communication to the Japan eSIM.
Can I use phone calls or SMS with Japan eSIM?
With data-only eSIM, you cannot use voice calls or SMS with a standard phone number.
If you need a phone number, please check the eSIM Plans with Phone Numbers.
What should I do if eSIM cannot connect?
Check the eSIM line, mobile data communication, data roaming, and APN settings, and try toggling airplane mode on and off or restarting the device.
For more details, please refer to Troubleshooting When eSIM Cannot Connect.
Conclusion
If you want to use the internet immediately after arriving in Japan, it is important to prepare your communication method before your trip.
In Japan, you can use free Wi-Fi at the airport, SIM cards, rental Wi-Fi, and international roaming, but eSIM, which does not require pickup at the airport or SIM card replacement, is recommended for those who want to use it immediately after arrival.
Check your eSIM-compatible device, SIM lock, setup method, and required data capacity before your trip, and prepare to use maps, transfer information, and translation apps as soon as you arrive in Japan.
JAPAN&GLOBAL eSIM offers Japan eSIM plans that you can choose based on your travel duration and data usage.
