NTT docomo
One of the current partner networks for Japan.
Kronuvo Connect · Japan
Japan eSIM travel guide
Compare current Japan eSIM plans by data allowance, validity, local networks, hotspot needs and whether Japan is your only destination.
Last reviewed: 15 September 2026.
Japan network facts
NTT docomo, KDDI/au, Rakuten Mobile and SoftBank.
The current Japan page lists all four networks on 5G and says the phone selects the strongest available signal automatically.
KDDI/au
One of the current partner networks for Japan.
Rakuten Mobile
One of the current partner networks for Japan.
SoftBank
One of the current partner networks for Japan.
Hotspot supported
Personal hotspot and tethering are supported.
Data-only
Keep the home number on the normal SIM while the travel eSIM carries mobile data.
Activation and setup
Install before departure, connect on arrival.
The current Japan page says validity starts on the first network connection in Japan. The eSIM is delivered digitally and can be installed before travel on an unlocked compatible phone.
Japan + Asia
Japan-only plan or regional Asia plan?
For Japan-only travel, compare country plans first. For trips that also include South Korea, Singapore or other Asian markets, compare the exact regional footprint and full-trip validity.
Live Japan plans
Use current storefront data before purchase.
Prices, inventory, data allowances and commercial terms can change.
FAQ
Frequently asked questions.
Which mobile networks does Kronuvo Connect use in Japan?
Kronuvo Connect currently lists KDDI/au, NTT docomo, Rakuten Mobile and SoftBank on 5G in Japan, with the phone selecting the strongest available signal automatically.
When does a Japan eSIM plan start?
The current Japan destination page states that validity begins the first time the eSIM connects to a network in Japan, not when the plan is purchased.
Does the Japan eSIM support hotspot?
Yes. Kronuvo Connect states that personal hotspot and tethering are supported.
Can I keep my phone number in Japan?
Yes. The travel eSIM is data-only, so the normal SIM can remain active for calls and texts while the eSIM carries mobile data.