eSIM plans for Japan
The best-value plan for each size, duplicates and overpriced options are hidden automatically.
A Japan travel eSIM from Londonesim.io gets you online the minute you land, no roaming charges and no SIM card to swap. 5 plans cover Japan, starting at $9.00, including unlimited-data options and validity up to 180 days. Buy online, get your QR code by email, and scan to connect.
Japan 1GB 7Days
Japan Unlimited / 7 Days
Japan 3GB 15Days (IIJ)
Japan 10GB 30Days (IIJ)
Japan 50GB 180Days
Mobile networks in Japan
In Japan, your Londonesim.io eSIM connects to NTT docomo, Rakuten Mobile, KDDI/au and SoftBank on 5G, selecting the strongest available signal automatically. Personal hotspot & tethering is supported.
Using an eSIM in Japan
- • Works on any eSIM-capable, carrier-unlocked phone.
- • Data-only, keep your own number for calls and texts.
- • Activates on arrival; validity starts on first connection in Japan.
- • Delivered instantly by email as a QR code, nothing to ship.
Japan eSIM, FAQ
Do I need an eSIM for Japan?
If you want mobile data in Japan without paying expensive roaming fees, a travel eSIM is the easiest option. You install it before you leave and it connects automatically when you arrive.
Will my phone work with a Japan eSIM?
Yes, as long as your phone is eSIM-capable and carrier-unlocked. Most phones from 2018 onward qualify (iPhone XR/XS and newer, recent Samsung Galaxy and Google Pixel). Dial *#06#, if you see an EID, you're good to go.
When does my Japan eSIM start?
Your validity period begins the first time the eSIM connects to a network in Japan, not when you buy it. Install it before you travel and it activates on arrival.
Can I keep my phone number in Japan?
Yes. The eSIM runs alongside your normal SIM and is data-only, so you keep your home number for calls and texts while using Londonesim.io's eSIM for data in Japan.
Which mobile network does the eSIM use in Japan?
In Japan, your Londonesim.io eSIM connects to NTT docomo, Rakuten Mobile, KDDI/au and SoftBank on 5G. Your phone automatically selects the strongest available signal, and personal hotspot / tethering is supported.