Nanae Takahashi
On December 29, Taiyo won the High Speed Championship for the fourth time, regaining the title from Yoneyama. Following the main event of the evening, Taiyo challenged World of Stardom Champion Io Shirai. On January 12, 2014, Taiyo celebrated her tenth anniversary in professional wrestling by reuniting with Nanae Takahashi in a tag team main event, where they defeated Mayu Iwatani and Yoshiko. On January 26 at Stardom's third anniversary event, Taiyo unsuccessfully challenged Shirai for the World of Stardom Championship. Following the match, Taiyo announced she would be retiring from professional wrestling on June 1. On February 2, Taiyo defeated Kaori Yoneyama in a rematch to make her first successful defense of the High Speed Championship. On March 16, Taiyo was defeated by Yoshiko in the final match between the longtime tag team partners. Taiyo continued making successful defenses of the High Speed Championship, defeating Mayu Iwatani on April 6 and Kaori Yoneyama in a two out of three falls match on April 29. Later in the event, Taiyo offered to make her final defense of the title against World of Stardom Champion Io Shirai, noting that she had also made her first ever defense of the title against her in July 2009. On May 3, Taiyo and Yoshiko teamed up for what was billed as Kawasaki Katsushika Saikyou Densetsu's final match together, where they defeated Shirai and Nanae Takahashi. Three days later, Taiyo lost the High Speed Championship to Shirai. After announcing her retirement, Taiyo began making farewell appearances for several other promotions, including Gatoh Move Pro Wrestling, Ice Ribbon, JWP Joshi Puroresu, and Sendai Girls' Pro Wrestling, while also working independent events produced by Chigusa Nagayo and Ray. On May 24, Passion Red reunited for their sixth self-produced event, during which Taiyo wrestled three times, including in an exhibition tag team match with her idol Momoe Nakanishi, who had retired in 2005, and in a tag team main event, where she and Nanae Takahashi defeated Command Bolshoi and Meiko Satomura. On June 1, Taiyo was defeated by Nanae Takahashi in her retirement match.