When searching for an eSIM for traveling in Japan, you may come across the term "Compatible with SoftBank network."
The SoftBank network is a mobile communication network provided by SoftBank Corp., which offers high-speed communication, especially in urban areas such as Tokyo, Osaka, Nagoya, and Fukuoka. It is widely adopted in travel-oriented eSIMs.
In this article, we will explain what the SoftBank network is, why it is recommended for travel in Japan, its advantages and disadvantages, and points to consider when choosing an eSIM.
If you want to know more about eSIMs in Japan, please also check out the Complete Guide to Japan eSIM .

What is the SoftBank Network?
The SoftBank network is a mobile communication network provided by SoftBank Corp.
It can be used throughout Japan, but especially in urban areas like Tokyo, Osaka, Nagoya, and Fukuoka, you can expect high-speed and stable communication.
| Item | Details |
|---|---|
| Telecommunication Company | SoftBank |
| Coverage Area | Nationwide |
| 5G Support | Available in certain areas |
| Recommended for Travelers | ★★★★☆ |
Many travel-oriented eSIMs are available that connect to the SoftBank network.
Reasons Why the SoftBank Network is Recommended for Travelers
Easy Access to High-Speed Communication in Urban Areas
In major cities like Tokyo, Osaka, Kyoto, Nagoya, and Fukuoka, you can expect comfortable communication speeds.
Easy to Use in Tourist Areas
In major tourist spots, you can comfortably use Google Maps, transit guides, and social media.
Widely Adopted in Travel-Oriented eSIMs
Many plans utilizing the SoftBank network are offered in eSIMs for Japan.

Communication Areas of the SoftBank Network
| Region | Ease of Use |
|---|---|
| Tokyo | ★★★★★ |
| Osaka | ★★★★★ |
| Kyoto | ★★★★☆ |
| Nagoya | ★★★★★ |
| Fukuoka | ★★★★★ |
| Regional Cities | ★★★★☆ |
| Mountain Areas | ★★★☆☆ |
In general, you will rarely have trouble with communication areas during a trip to Japan, making it suitable for travel focused on urban areas.
Who is the SoftBank Network Recommended For?
- Those traveling to Tokyo, Osaka, and Nagoya
- Those planning to focus on sightseeing in urban areas
- Those who prioritize high-speed communication
- First-time users of eSIM in Japan
- Those who frequently use video streaming or social media

Advantages and Disadvantages of the SoftBank Network
Advantages
- Easy access to high-speed communication in urban areas
- Stable communication quality at major tourist spots
- Expanding areas with 5G support
- Widely adopted in travel-oriented eSIMs
Disadvantages
- In mountain areas, it may be less reliable than the Docomo network
- The available network may vary by product
- Communication speed may decrease during peak times
If you are traveling mainly in urban areas, you will most likely be able to communicate comfortably with the SoftBank network.

Comparison with Docomo and au Networks
| Comparison Item | SoftBank | Docomo | au |
|---|---|---|---|
| Urban Areas | ★★★★★ | ★★★★★ | ★★★★★ |
| Rural Areas | ★★★★☆ | ★★★★★ | ★★★★☆ |
| Mountain Areas | ★★★☆☆ | ★★★★★ | ★★★★☆ |
| 5G Support | ★★★★★ | ★★★★★ | ★★★★★ |
| Recommended for Travelers | ★★★★☆ | ★★★★★ | ★★★★☆ |
If you are traveling mainly in urban areas like Tokyo, Osaka, Nagoya, and Fukuoka, you can expect comfortable communication with the SoftBank network.
For round trips that include rural and mountain areas, it is also reassuring to compare with the Docomo network.
Points to Consider When Choosing a SoftBank Network eSIM
Choose a Plan that Matches Your Travel Duration
Select a plan that fits your stay, such as 3 days, 7 days, 15 days, or 30 days.
Check the Required Data Capacity
If you mainly use Google Maps and social media, a small capacity plan is sufficient. For video streaming or tethering, a large capacity plan is recommended.
Check Compatible Devices
Before purchasing, please check the List of eSIM-Compatible Devices .
Also Check the Setup Method
For first-time users, the eSIM Setup Guide can also be helpful.
Frequently Asked Questions
Can the SoftBank network be used nationwide in Japan?
Yes. It can be used nationwide, but especially in urban areas, stable communication can be expected.
Is the SoftBank network recommended for travelers?
It is recommended for those traveling to Tokyo, Osaka, Nagoya, and Fukuoka.
Can I use 5G communication?
There are products that allow 5G communication if you have a compatible device and are in a supported area.
Can it be used in rural areas?
It can be used in regional cities, but communication conditions may vary in mountain areas.
Will I definitely be on the SoftBank network with an eSIM?
No. The telecommunication company you use may vary by product. Please check the supported network before purchasing.
What should I do if I cannot connect?
Please check the eSIM connection, mobile data communication, data roaming, and APN settings in order.
Which is better, the SoftBank network or the au network?
Both are comfortable if you are mainly in urban areas. If you travel often to rural areas, it is good to compare with the Docomo network as well.
Where can I purchase an eSIM for traveling in Japan?
Many products can be purchased online, and you can easily set them up by scanning a QR code.
Conclusion
The SoftBank network is popular for eSIMs for traveling in Japan because it offers high-speed and stable communication, especially in urban areas.
- Easy access to high-speed communication in urban areas
- Stable communication quality at major tourist spots
- Wide areas with 5G support
- Widely adopted in travel-oriented eSIMs
While comparing travel duration and data capacity, choose the Japan eSIM that suits you best.