5★STAR Grand Prix 2023 ~ Opening Round was a professional wrestling event promoted by World Wonder Ring Stardom, held on July 23, 2023 at Ota City General Gymnasium in Tokyo, Japan. It served as the first show for the company's annual round-robin singles tournament and included all twenty competitors in block matches.
Yuria Tauchi
Saya Kamitani
Eimi Gloria Matsudo
Saori Anou
Mayu Iwatani
Reo Hazuki
Syuri Kondo
Suzu Suzuki
Mirai Ito
Momo Watanabe
Mina Shirakawa
Utami Hayashishita
Natsumi Takagi
Starlight Kid
Ami Miura
Natsuko Tora
Mariah May Mead
Azumi
Maika
Hanan
Koguma
Saya Iida
Shieru Wakana
Hina
Chie Nagatani
Miyu Matsuda
Mai Sakurai
Thekla Kaischauri
Mei Suzuki
Saki Kashima
Hanako Ueda
Yuna Mizumori