All Star Grand Queendom 2026 was a professional wrestling event promoted by World Wonder Ring Stardom, held on April 26, 2026, at Yokohama Arena in Yokohama, Kanagawa, Japan. It is the fourth event in the Grand Queendom chronology, and in the main event, Saya Kamitami defended the World of Stardom Championship against Sayaka Kurara, who was forced to put the future of the Cosmic Angels stable on the line in an attempt to topple the Phenix Queen. Other featured matches include a Wonder of Stardom Championship match between champion Konami and 2026 Cinderella Tournament winner Hanan, 02line (AZM and Miyu Amasaki) challenging BMI2000 (Natsuko Tora and Ruaka) for the the Goddesses of Stardom Championship after a controversial prior defense in January, and Natsupoi and Maki Itoh in a kawaii-based grudge match. Long-time star Saki Kashima will also have her retirement ceremony on the show, avoiding actually having to wrestle a match, as is tradition for the master of the Kishikaisei.