We have incredi…
If you have someone who will join your Japan life,
maybe one of the option is getting prepaid sim card at Narita Airport.
There is one bending machine at 1F just behind information counter
of Narita Airport Terminal 1.
Or, if you want to prepare in advance, you can also buy amazon and search for
Japan prepaid sim.
However, it will be more expensive to use for long term of use.
If you are panning to stay here longer than a month, maybe you should think of getting a Japanese sim card with us.