Wanted to relieve you from "Supercharger anxiety".
Here in Tokyo we have three SC locations nearby (which doesn't really make sense). Among those Grand Hyatt SC in Roppongi area is the most terrible, possible among all SC worldwide...
1. Only 2 stalls
2. Since it's in valet parking area much less ICEing, but some Tesla owners leave their cars for hours.
3. Parking fee is $12 per hour. If you spend more than $50 in the mall, validation is available.
4. Rather frequently the SC is closed due to hotel events, of course without prior notice.
5. Hotel staff is not polite and they always say "don't do this and that".
6. If both stalls are occupied there's no place to wait. You have to leave.
Personally I don't spend money there