During your trip to Japan, you will often have the opportunity to contact family and friends via LINE and send photos. Therefore, you may be wondering, "How much data does LINE use?" and "Is a 3GB or 5GB eSIM sufficient?"
LINE is an app that consumes very little data if you are only sending and receiving messages. However, if you use voice calls or video calls for extended periods, your data usage will increase.
In this article, we will explain in detail the data usage for different LINE activities, recommended eSIM capacities for your trip to Japan, and ways to save on data usage.

How much data does LINE use?
The data usage of LINE varies depending on the features you use. Sending and receiving messages consumes very little data, but voice calls and video calls require more data.
| Usage Type | Estimated Data Usage |
|---|---|
| Message Sending and Receiving | Very little |
| Photo Sending | Low |
| Voice Calls | Moderate |
| Video Calls | High |
| Video Sending | High |
If you are only sending text messages or photos during your trip, you don't need to worry too much about data usage.

How many GB should you have for a trip to Japan?
If you are only using LINE, you won't need a lot of data. However, if you are also using other apps like Google Maps, Instagram, or YouTube, it's important to choose a plan that considers the total data usage for your trip.
| Usage Style | Recommended Capacity |
|---|---|
| Message-Centric | 3GB |
| Photo Sending & Voice Calls | 5GB |
| Using Video Calls | 10GB |
| Frequent Video Calls | Unlimited |
It's advisable to choose a generous eSIM plan that takes into account not only LINE usage but also other apps you will use during your trip.
How to Save on LINE Data Usage
- Use video calls in a Wi-Fi environment
- Send video files over Wi-Fi
- Turn off unnecessary automatic downloads
- Compress photos before sending them if necessary
- Choose an eSIM plan that matches the number of travel days
LINE is a relatively low-data app, but long video calls and video sending can increase data consumption. By effectively using Wi-Fi and eSIM, you can save on data while enjoying a comfortable experience.

Points to Consider When Using LINE
To use LINE comfortably during your trip to Japan, it's important to manage your data usage according to the features you use. Keeping the following points in mind will help you stay in touch with family and friends while minimizing data consumption.
- Use video calls over Wi-Fi in hotels or cafes
- Send long videos or large numbers of photos in a Wi-Fi environment
- Check the automatic download settings for photos and videos
- Avoid excessive background data usage
- Consider other apps you will use when choosing eSIM capacity
If you are only using LINE for messages and voice calls, your data usage will be relatively low. However, if you frequently engage in video calls or send video files, it's wise to choose a generous eSIM plan.

Frequently Asked Questions
Is 3GB enough for just LINE?
If your usage mainly consists of sending and receiving messages and short voice calls, 3GB is often sufficient. However, if you also use Google Maps or social media, it's safer to choose 5GB or more.
Does LINE messaging use a lot of data?
No. The data required for sending and receiving text messages is very low, so it typically does not consume a significant amount of your data allowance.
How much data does LINE voice calling use?
Voice calls use less data than video streaming, but long calls can increase data consumption. For short calls, a large data plan is not necessary.
Is LINE video calling data-intensive?
Yes. Since it transmits both video and audio simultaneously, it uses more data than messaging or voice calls. If you plan to use it for long periods, it's advisable to utilize Wi-Fi or choose a plan with 10GB or more.
Does sending photos or videos on LINE increase data usage?
Yes. While photos can be sent with relatively low data usage, high-quality videos or long video files consume a lot of data. Sending them over Wi-Fi can help save on data.
What GB eSIM is recommended for a trip to Japan?
If your usage mainly consists of LINE messaging and voice calls, along with Google Maps, 3-5GB is recommended. If you plan to use video calls or social media frequently, 10GB or more is advisable. For those who want to use data without worry, an unlimited plan is recommended.
Can I use LINE on the subway or JR trains?
Yes. As long as you are in a serviceable area, you can use LINE on the subway or JR trains. However, in deep underground areas or long tunnels, the connection may temporarily become unstable.
Is there anything I should prepare before my trip?
It's a good idea to set up your eSIM before your trip and ensure you can log into LINE. Also, check the automatic download settings for photos and videos in advance.
Conclusion
LINE is a convenient app for staying in touch with family and friends during your trip to Japan. While the data usage for text messages is very low, be cautious as data consumption can increase significantly with long video calls or video sending.
- Text message data usage is very low
- Voice calls can be used with relatively low data consumption
- Video calls and video sending use a lot of data
- Utilizing Wi-Fi can help save on data
- It's important to consider other apps when choosing eSIM capacity
By preparing your eSIM before your trip, you can enjoy not only LINE but also Google Maps, transit apps, and social media comfortably. Choose a plan that fits your usage style and stay connected during your trip to Japan.