Why eSIM is Better than Pocket WiFi in Japan
For years, renting a "Pocket WiFi" router at Narita or Haneda airport was the standard for tourists. While reliable, it meant carrying an extra device, charging another battery, and worrying about returning it before your flight. eSIMs have completely replaced the need for Pocket WiFi. They are cheaper, more convenient, and instant.
Key Advantages
- No Hardware to Return: Avoid the stress of finding the return mailbox at the airport before your flight.
- Cheaper: Pocket WiFi rentals can cost $5-10/day. A 10GB eSIM from Ubigi costs around $17 total for a whole month.
- Tethering: You can still share your connection with your laptop or friends using your phone's hotspot feature (check your plan details).
Network Coverage: Docomo vs. Softbank vs. KDDI
Japan has three major networks. Here is what you need to know:
NTT Docomo
The largest and most reliable network, especially in rural areas and mountains (great for skiing in Niseko or hiking in Hakone). Ubigi uses Docomo.
Softbank
Excellent speeds in major cities like Tokyo and Osaka. Comparable to Docomo in urban areas but slightly weaker in very remote spots. Airalo often uses Softbank.
KDDI (au)
Another strong competitor, often used as a backup network for roaming eSIMs.
Travel Tips for Japan
- Google Maps is Essential: Public transport in Tokyo is complex. You need data for real-time train schedules and platform numbers.
- Translation Apps: Google Translate (especially the camera feature for menus) requires data and is a lifesaver.
- Free WiFi is Spotty: Unlike some countries, public WiFi in Japan can be difficult to connect to or require complex registration. Don't rely on it.
FAQ
Most travel eSIMs for Japan are data-only. You cannot make traditional voice calls. However, you can use WhatsApp, LINE (very popular in Japan), or FaceTime.
Yes, Japan has extensive 5G coverage in cities. Ubigi and Holafly typically offer 5G access where available.