Miyako Matsumoto
After the ICE×60 Championship was vacated, following Maki Narumiya being sidelined with an injury, Tsukushi entered a round-robin tournament to determine the new champion, wrestling Hikaru Shida to a ten-minute time limit draw in her opening match on January 26. On February 11, Tsukushi and Aoi Kizuki made their first successful defense of the International Ribbon Tag Team and Reina World Tag Team Championships against Hailey Hatred and Kurumi, with Kizuki pinning Kurumi with just one second remaining before a twenty-minute time limit, which would have resulted in the titles being vacated. After a win over Risa Sera and a draw with Neko Nitta, Tsukushi finished her ICE×60 Championship tournament round-robin block on February 16 with four points, advancing to the semifinals in the second place behind Hikaru Shida. On February 23, Tsukushi defeated Tsukasa Fujimoto in her semifinal match to advance to the finals of the tournament. On February 27, Tsukushi defeated Miyako Matsumoto to win the tournament and the ICE×60 Championship for the first time. Tsukushi made her first successful title defense on March 31 against Kurumi. On April 14, Tsukushi made her debut for the JWP Joshi Puroresu promotion, teaming with Rabbit Miu to defeat Nana Kawasa and Rydeen Hagane in a tag team match. On May 4, Tsukushi defeated Seishun Midori stablemate Aoi Kizuki for her second successful defense of the ICE×60 Championship. On May 25, Tsukushi and Kizuki lost the International Ribbon Tag Team and Reina World Tag Team Championships to Hikaru Shida and Tsukasa Fujimoto. On June 22, Tsukushi made her third successful defense of the ICE×60 Championship against Neko Nitta. On July 14, Tsukushi lost the ICE×60 Championship to Tsukasa Fujimoto in her fourth defense, a championship unification match also contested for the IW19 Championship, ending her reign at 137 days.