Does it require an advance reservation to visit the opera house?

The opera house visit does not require an appointment; you can enter freely outside the ticket checking area. Within the area, you can buy tickets by time slot.
Within one hour is not required, in-depth exploration requires a ticket.
No reservation is required, but tickets for the performance must be purchased in advance. Photos can be taken outside, and souvenirs can also be purchased inside.
Explore, dine, no reservation required, delve deeper and learn more, tickets needed.
If you only wish to visit the foyer, ticket office, or dine and drink at the restaurant/bar, no reservation is required. In-depth exploration requires ticket reservation.
That can’t be seen, it’s blocked.
The opera house visit does not require an appointment, you can enter freely outside the ticket validation area. You just need to buy tickets within the designated time slots within the area.
Within an hour is not necessary, in-depth exploration requires a ticket.
No reservation is required, but tickets for the performance must be purchased in advance. Photos can be taken outside, and souvenirs can also be purchased inside.
Stroll around, dine, no reservation required, and get a deeper understanding by purchasing a ticket.
If you only want to visit the foyer, box office, or dine and drink at the restaurant/bar, no reservation is required. In-depth exploration requires ticket reservations.
That can’t be seen, it’s blocked.