Starting Saturday, May 16, Fighters Sports & Entertainment will host the "Roof Open Game supported by B-Union" at ES CON FIELD Hokkaido, opening the retractable roof on days with favorable weather conditions. This unique event allows fans to enjoy the blue sky and fresh natural grass breeze. The organization will publish "roof open expectations" on its website up to two weeks in advance. On event days, attendees will receive an exclusive original sticker to commemorate the extraordinary ballpark experience.