Heartbeat

There is a reason why this stairs have to be red.

Red has an visual effect for the audience to feel excited before arriving to their seats in the theater.

Then are there any stairs for the actors and actresses to move to the stage from their waiting room?

Yes, there are in Tokyo Bunka Kaikan. It is blue, because they have to calm down before excellent performance.

I'm going to find a way to gain access to the blue stairs next time.

Done