I’m surprised that there are no Japanese carriers supporting Apple’s eSIM. I’ve never heard of the two global providers, GigSky and Truphone.
GigSky seems to be data only. Truphone might have calling with data. Neither site is very good at providing information.
However, if you want to view useless graphics or pictures in white space in the hope of distracting you from their lack of details, both are excellent destinations.
If I dive into the iPhone Xs for some unexpected reason, I will do so in the T-Mobile USA pond for the eSIM. Some fine Japanese provider or MMVO will happily fill my SIM slot.
Stay tuned for my take on the Apple event.