Ticket for Universal Studios Japan

I'm planning to travel to Osaka with 7 Friends and of course we want to visit Nintendo World
I'm trying to buy the tickets from usjticketing.com but It has a límite of 1/2 at the day, but in the japanease one i can buy al 7 at once
If I we buy one for ourselves the rest would still be able to buy more? Or the 1 ticket max its the only remaining ticket and the rest won't be able to buy his own ticket?
On the other hand, the japanease one requieres to say where are you from Japan, is that mandatory? Or may i just put some random places like the Airbnb and buy all 7?
Also Im planning to buy them for october last week so maybe its still not available
Ty in advance everyone <3

by Consistent-Pin-3281