Ubigi specializes in eSIMs for those planning a longer stay in Japan. While they do offer economical 1- and 7-day plans (including an unlimited option), the majority of their Japan eSIMs are valid for 30 days. These month-long plans include 1, 3, 10, 25, 50 GB and unlimited data. Ubigi also offers three annual fixed-data plans and a range of Asia-wide and worldwide eSIMs that are valid in Japan.
About Ubigi
Ubigi was launched by global telecom company Transatel in 2017. A member of the NTT Group, It offers eSIMs for over 200 destinations worldwide.
Ubigi’s Japan eSIM highlights
Ubigi’s Japan eSIMs offer:
- Quick activation: We received a QR code immediately after signup and purchase
- Fast speeds: Ubigi ranked highly in our speed tests
- Big data: Ubigi’s 50GB and unlimited plans suits groups or heavy data users
- Asia and worldwide eSIMs: The option to cover an extensive trip with just one sim
- Annual plans: In case you’re planning an extended stay or multiple trips
- Reliable networks: Ubigi runs on NTT Docomo and KDDI AU networks.
- Recharge: The option to top up data or days within the app
How Ubigi’s Japan eSIMs work
You can purchase a Ubigi eSIM through the Ubigi website or app. If you buy through the website, install the eSIM using the QR code emailed to you, and then create a Ubigi account online or through the app to check and manage your data. Alternatively, download the app from the start to purchase, install, and activate your eSIM.
Setting Up Your Ubigi Japan eSIM
- 1. Select and purchase your plan
- 2. Before your trip, scan the QR code to install your eSIM
- 3. Download the iOS or Android app to create an account, check your usage, or top up your plan
Ubigi’s network speeds
Our tests
(Upload/Download/Latency, in Mbps)
Test 1: CTCSCI Tech Ltd: 176/19.2/375
Test 2: i3D.net: 212/22.5/27
Test 3: Verizon Tokyo: 93.7/3.42/24
Test 4: Rakuten Mobile Inc.: 96/5.4/214
Test 5: Web: 52.03/Na/433
Network Provider
Ubigi runs on both KDDI AU and NTT Docomo’s local networks. This means you’ll receive reliable 3G and 4G connectivity in most areas of Japan on both networks and NTT Docomo 5G where available.
User Reviews
Ubigi has an average of 4.1 stars on Trustpilot. Positive reviews cite fast speeds in Japan and general ease of installation and use. Lower ratings generally relate to customer service and network coverage in specific countries or regions.
Alternatives to Ubigi
Ubigi has built a name for itself with its fast speeds and affordablity but it’s helpul to know what your options are. Some users may have a preference for flexibility or voice + data plans.
To help you make an informed decision, we’ve created a video guide comparing different eSIM options for Japan.
For a more detailed comparison of Ubigi with other eSIM providers for Japan, including up-to-date pricing and features, check out our comprehensive written guide.
Frequently Asked Questions
Q: Can I use tethering/hotspot with Ubigi’s eSIMs?
A: Tethering is possible if your device or network supports it. In some cases, you might need to update the APN settings on your device.
Q: Can I top up if I run out of data?
A: Yes, Ubigi offers the option to top up your fixed-data plana through their mobile app.
Q: How is the coverage in rural areas?
A: With access to both KDDI and Docomo networks, coverage is generally good across Japan, including many rural areas. However, extremely remote locations might have limited service.
Q: Can I share my Ubigi Japan eSIM between devices?
A: No, each eSIM is tied to a single device. You’ll need to purchase separate plans for additional devices. Alternatively, if you’re traveling with family or a small group, consider renting a pocket WiFi device to share.
Q: Can I make phone calls with Ubigi’s Japan eSIM?
A: No, Ubigi’s eSIMs are data-only. For calls, consider using internet-based apps like WhatsApp or Skype. If you need traditional voice calling capabilities, other providers, such as Mobal, offer eSIMs with voice services included. To compare different providers and their offerings, check our comprehensive guide: eSIM Options for Japan Travel.
While we do our best to ensure the information here is correct, it is subject to change.