Seibu Lions en Amusement Park, Saitama Seibu Lions, and Seibu Lions have announced that they will hold the "Seibu Lions en Area All-Day Enjoyment Event: Seibu Lions Amusement Seibu Lions Showa Day" at Seibu-en Amusement Park on April 29th, Showa Day, as part of the "Seibu Lions Group Showa 100th Anniversary SPECIAL PROJECT."

This event brings together Seibu-en Seibu Lions, themed around the Showa era, and The Lions that built a glorious history during that time, to offer a special experience where visitors can enjoy the charms of baseball and amusement parks throughout the day. The main contents will include a talk show featuring former manager Hatsuhiko Tsuji, who supported the golden age of Saitama Seibu Lions, and a performance by "Emidan!!", a dance project that enlivens Seibu Lions Line, among other diverse events.

In addition, the park will feature events that can be enjoyed by a wide range of generations, not just The Lions fans, such as the "'The Secret Word is The Lions' Rally," the "The Lions Festival," and a streetcar displaying past The Lions news. There will also be special benefits for visitors wearing uniforms and preferential treatment for those with same-day tickets for Belluna Dome.