It’s been a few years, so not sure if they are necessary anymore.. But it’s basically just a little a little hotspot you rent at the airport and gives you service everywhere. Something like this https://www.japan-wireless.com/
I’ll grab one! Looks useful. Still figuring out what the internet/ SMS situation will look like with AT&T lol
Reasonably priced, I’m gonna get one as a back up regardless.
Or just use silent.link
You’ve used this before ? Looks clutch af
iirc, @island mentioned this to me couple of months ago, when i asked him about data plans for tokyo