Japan + South Korea eSIM
One eSIM for 2 countries. Data only. Days start when you first connect at your destination.

How much data do you need?
Estimates are cautious: half of each plan is set aside for background updates.
Questions about Japan + South Korea
When do the days start?
When the eSIM first connects at your destination. You can install it well before your trip.
Can I add more data?
Yes, on the same eSIM. Nothing new to install.
Do I keep my regular number?
Yes. The eSIM is added as a second line and your usual SIM stays in the phone.