The Saturn Theater is a small theater in the basement of the Ghibli Museum with only about 80 seats. There you can watch an original short animated film from Studio Ghibli, which can only be seen at the Museum, and nowhere else.
A blue sky and lots of colorful flowers are drawn on the ceiling and walls. When the film ends, the windows open and the sunshine comes in. Every couple of weeks or even a month the theatre plays a different film.