All Star Grand Queendom 2026 was a professional wrestling event promoted by World Wonder Ring Stardom. It was held on April 26, 2026 at Yokohama Arena in Yokohama, Kanagawa, Japan, and is the fourth event in the Grand Queendom chronology. In the main event, Saya Kamitami defended the World of Stardom Championship against Sayaka Kurara, who was forced to risk the future of Cosmic Angels in an attempt to topple the Phenix Queen. Other featured matches included 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. A retirement ceremony for long-time star Saki Kashima was also held.