Hello, we’re Minato and Mirai♪
Are you facing any of these concerns while preparing for your trip to Japan?
- Buying a SIM card at the airport is a hassle…
- Portable WiFi is bulky to carry…
- I want to use the internet immediately after arrival!
In that case, we highly recommend using an eSIM.
In this article, based on actual network performance, we’ve carefully selected 2 recommended eSIMs for traveling in Japan!
We’re sharing recommendations based on real experience using mobile data across Japan, including Tokyo and Yokohama♪
We’ve picked the best options for flights, transport, hotels, and activities — so you know exactly where to book.
Conclusion: If unsure, choose Airalo or Yesim!
| eSIM | Features | Rating |
|---|---|---|
| Airalo | Stable network, easy for beginners | ★★★★★ |
| Yesim | Feature-rich, good for comparison | ★★★★☆ |
Basically, you can’t go wrong with Airalo.
If you’re unsure, just check Yesim as an alternative.
Why Airalo is recommended (Strong network)
In Japan, network quality varies significantly depending on which carrier’s network is used.
The three major network providers are listed below, and all eSIMs use one of these networks.
Based on real-world experience, network quality ranks as follows:
- KDDI (au) → Most stable in both cities and rural areas
- SoftBank → Good in cities, but sometimes weaker in rural areas
- Docomo → Can be slow during congestion in urban areas
Especially in major stations in Tokyo and Osaka, Docomo networks can sometimes be slow or difficult to connect.
In contrast, Airalo uses KDDI + SoftBank networks, offering a very well-balanced and stable experience.
Airalo vs Yesim｜Which one should you choose?
| Item | Airalo | Yesim |
|---|---|---|
| Network | KDDI / SoftBank | Multiple carriers (not disclosed) |
| Stability | ◎ Very stable | ○ Good |
| Ease of use | ◎ Simple and beginner-friendly | ○ Feature-rich |
| Best for | If you’re unsure, choose this | For those who want to compare |
Both options are excellent, but the key difference lies in network stability and simplicity.
In Japan, network performance varies depending on the carrier, especially in crowded urban areas.
Airalo supports KDDI (au) and SoftBank networks, making it stable in both cities and rural areas.
👉 If you want stable connectivity and a hassle-free experience, Airalo is the best choice.
On the other hand, Yesim may connect to multiple carriers and offers more features.
👉 If you want to compare options or value additional features, Yesim is also worth considering.
If unsure, go with Airalo｜Simple decision guide
If you’re unsure which one to choose, use the following criteria:
- Not sure → Airalo (best overall choice)
- Prioritize stable connection → Airalo
- Want to compare options → Yesim
In Japan, navigation apps like Google Maps and train route apps are essential.
Also, real-time translation can be extremely helpful in many situations.
That’s why choosing a reliable network is the most important factor.
Prepare your eSIM in advance and enjoy a smooth journey from the moment you arrive in Japan!
Get your eSIM ready here!
