au (KDDI) eSIM for Japan
Prepaid data for your Japan trip on plans that list KDDI as a network. KDDI runs the au mobile network. Every plan below shows its total price, its days and its data before you pay.
Plans on KDDI (au): 561 day to 30 daysFrom $1.88
What every KDDI (au) plan includes
Network on the plan card
These plans list KDDI, Docomo as their network.
Data and hotspot
Data only · Hotspot included
About KDDI (au)
KDDI is a Japanese telecommunications company, and au is the name its mobile network and services carry. It runs its own 4G LTE and 5G networks across Japan.
When plans on KDDI (au) fit your trip
- You want a Japan plan that names its network before you pay, and au is one you know.
- You are not tied to one network: these plans list KDDI and docomo, and your phone can join either.
- You need mobile data for maps, messages and train times rather than a Japanese phone number.
Mobile networks in Japan
The networks in Japan include NTT docomo, SoftBank, KDDI au and Rakuten Mobile. Our Japan plans run on the networks below, and every plan card names its network before you pay.
Check your phone first
Your phone needs to support eSIM and be unlocked for other networks. A phone sold for another market may not cover every band KDDI (au) uses, so check your exact model before you buy.
More for your Japan trip
A few things before you fly.
What is KDDI, and what is au?
KDDI is the Japanese company; au is the brand of its mobile network. A plan that lists KDDI uses that network in Japan. An au eSIM sold in Japanese shops is a different product, with a Japanese contract.
Will my phone use KDDI or docomo?
The plan card lists KDDI / Docomo, which means the plan can connect through either network. Keep network selection on automatic and the phone picks one; we do not promise which.
Do KDDI plans include 5G?
KDDI runs a 5G network in Japan, but our plan cards do not mention 5G, so we do not promise it. Choose by the data allowance and the days shown on the card.