When purchasing an eSIM for a trip to Japan, many people may wonder, "Is 20GB enough?" "Will it last for a two-week trip?"
20GB is a popular capacity for trips to Japan lasting 1 to 2 weeks. It allows travelers to enjoy not only Google Maps and LINE, but also some social media and videos, making it a choice for those who want to use their data comfortably.
In this article, we will explain in detail the number of days you can use with 20GB, data usage by app, and recommended usage scenarios.

How many days can you use with 20GB?
| Usage Style | Usage Estimate |
|---|---|
| Primarily Google Maps and LINE | 14 to 20 days |
| Using social media daily | 10 to 14 days |
| Watching YouTube | About 20 hours |
| Tethering | About 3 to 5 days |
If you primarily use Google Maps and LINE, 20GB can accommodate a trip of about two weeks. However, if you frequently watch videos or use tethering, be cautious as data consumption will increase quickly.
Data Usage by App
| App | Data Usage Estimate |
|---|---|
| Google Maps | About 5 to 10MB/hour |
| LINE | About 1 to 5MB/hour |
| About 100 to 300MB/hour | |
| YouTube (720p) | About 1GB/hour |
| TikTok | About 800MB to 1GB/hour |
Since Google Maps and LINE consume little data, you can use 20GB relatively comfortably. On the other hand, watching video content for long periods will significantly increase data usage.

Recommended Usage Scenarios for 20GB
| Travel Style | Recommendation Level |
|---|---|
| 10 to 14-day trip | ★★★★★ |
| Primarily Google Maps, LINE, and social media | ★★★★★ |
| Sharing photos and videos | ★★★★★ |
| Occasional video watching | ★★★★☆ |
| Tethering | ★★★☆☆ |
20GB is recommended for travelers who frequently use social media and share photos during trips of about 10 to 14 days.
Cases Where 20GB May Not Be Enough
- Watching YouTube or Netflix for long hours every day
- Frequently viewing videos on Instagram or TikTok
- Holding online meetings daily on Zoom or Google Meet
- Using tethering for long periods on a laptop
- Automatically backing up a large number of photos and videos to the cloud
If you engage in such activities frequently, consider plans with 30GB or more, or unlimited plans for peace of mind.

Tips for Using 20GB Longer
20GB is a popular capacity for trips lasting 1 to 2 weeks, but you can use it even more comfortably by being strategic about your usage.
- Use Wi-Fi at hotels and cafes
- Save Google Maps for offline use
- Watch videos in Wi-Fi environments
- Turn off automatic backup for photos and videos
- Stop background data usage for unnecessary apps
If you primarily use Google Maps and LINE, 20GB can often accommodate a trip of about two weeks.

Which Should You Choose: 20GB, 30GB, or 50GB?
| Capacity | Recommended Usage |
|---|---|
| 20GB | 10 to 14-day trip, primarily Google Maps, LINE, and social media |
| 30GB | 2 to 3-week trip, video watching, business trips |
| 50GB | Long-term stays, tethering, daily video usage |
20GB is sufficient for typical travel, but if your trip is longer or involves a lot of video watching, 30GB or more is recommended.
Frequently Asked Questions
Is 20GB enough for a two-week trip?
If you primarily use Google Maps and LINE, 20GB is often sufficient.
Is 20GB enough for a three-week trip?
It may be enough if your social media and video usage is low, but for more peace of mind, 30GB or more is recommended.
How much YouTube can I watch with 20GB?
At 720p quality, you can watch about 20 hours.
Will 20GB be enough if I use Instagram or TikTok daily?
If you only post photos, it should be fine, but for long video viewing, 30GB or more is recommended.
Can I use tethering with 20GB?
You can use it for short periods, but if you connect a laptop daily, data usage will increase significantly.
What should I do if I run out of data?
There are products available for purchasing additional data. It's a good idea to check if additional purchases are available before your trip.
Is 20GB popular for trips to Japan?
Yes. For trips lasting about 10 to 14 days, 20GB is a very popular capacity.
Which is recommended, 20GB or 30GB?
For trips of about 10 to 14 days, 20GB is sufficient, but for trips longer than two weeks or if you watch a lot of videos, 30GB or more is recommended.
Conclusion
20GB is a suitable capacity for trips to Japan lasting 1 to 2 weeks. It allows for comfortable use of not only Google Maps and LINE, but also social media and photo sharing, making it a popular choice among many travelers.
- Recommended for trips of about 10 to 14 days
- Can be used sufficiently if primarily using Google Maps, LINE, and social media
- For long trips or heavy video usage, 30GB or more is recommended
- Utilizing Wi-Fi can extend usage even further
Choose the optimal data capacity eSIM based on your travel duration and usage style.