Big Hat, a large scale multipurpose arena, was used as the main venue for the ice hockey events of the Nagano Winter Olympic Games. Its roof resembles a big hat and so it was named Big Hat. In winter it continues to be a venue for ice hockey and figure skating competitions. The venue boasts movable seats which can be stored within the walls, increasing the usable floor size in summer from 2,000 to 4,000m2. It can be utilized for exhibitions and a variety of other events. Utilising Wakasato Civic Cultural Hall, which is adjacent to Big Hat and served as the main press center of the Nagano Winter Olympic Games, as well as Big Hat, a large scale event can be held in the same area.