On July 29, 2022, it was announced by Takaaki Kidani, owner of World Wonder Ring Stardom and former chairman of NJPW through parent company Bushiroad, that Stardom's roster would compete for NJPW's first-ever women's championship, the IWGP Women's Championship, at the co-promoted event Historic X-Over, set to take place on November 20.

[2][3] The title is promoted as being managed by the IWGP Championship Committee, NJPW's kayfabe governing body.

On August 23 at the press conference for Historic X-Over, the dates and venues for the inaugural tournament were announced.

The representatives were Giulia (Donna Del Mondo), Mayu Iwatani (Stars), Starlight Kid (Oedo Tai), and Utami Hayashishita (Queen's Quest).

She won the title by defeating Moné at All Star Grand Queendom on April 23, 2023, in Yokohama, Japan.