Miyako Matsumoto
On January 22, 2014, Shirai held a press conference with the heads of Ice Ribbon, Oz Academy, Pro Wrestling Wave and Union Pro to announce that she had signed an unprecedented four-way contract with the promotions and was now officially affiliated with all four of them. As a signing gift, Shirai was given the right to book Oz Academy's March 2 event. She punished Seikigun's rivals Chikayo Nagashima, Hikaru Shida, Kagetsu and Sonoko Kato by placing them in unfavorable matches, named stablemates Mayumi Ozaki and Yumi Ohka the number one contenders to the Oz Academy Tag Team Championship and gave herself a shot at the Oz Academy Openweight Championship. Meanwhile, Shirai also earned another shot at the Union FTE World Championship, challenging Cherry after her first match under a Union Pro contract on February 11, where the two defeated Kaori Yoneyama and Sareee. On March 2, Shirai failed in her attempt to capture the Oz Academy Openweight Championship from Akino. Shirai also failed to win gold on two occasions in another one of her new home promotions, Ice Ribbon, unsuccessfully challenging Cherry for the Triangle Ribbon Championship on March 1 and Muscle Venus for the International Ribbon Tag Team Championship alongside Miyako Matsumoto on March 9. On March 23, Shirai also failed to win the Union FTE World Championship from Cherry. On May 15, Shirai and Kana produced Triple Tails.S' final independent event before officially dissolving the partnership, which featured a main event tag team match, where Shirai and Kayoko Haruyama were defeated by Kana and Arisa Nakajima. From May 5 to July 4, Shirai took part in the round-robin portion of the 2014 Catch the Wave tournament, finishing with a record of two wins, one draw and three losses, failing to advance from her block after losing to Misaki Ohata in their final round-robin match.