Hikaru Shida
On February 17, Ohka, as the 2009 Catch the Wave winner, was granted entrance into a tournament to determine the inaugural Wave Single Champion and defeated rival Misaki Ohata in her semifinal match. On March 17, Ohka defeated Kana in the finals to win the tournament and become the inaugural Wave Single Champion. Ohka made her first successful title defense on April 21 against Yuu Yamagata. On July 15, Ohka became a double champion in Wave, when she and Hikaru Shida defeated Triple Tails.S (Kana and Mio Shirai) for the Wave Tag Team Championship. However, after a reign of only a month, Shidarezakura lost the Wave Tag Team Championship to Yoko Hatanaka (Gami and Tomoka Nakagawa) in their first defense on August 15. On August 25, Ohka made her second successful defense of the Wave Single Championship against rival and winner of the 2013 Catch the Wave, Misaki Ohata. From September 1 to October 6, Ohka took part in the 2013 Dual Shock Wave tournament, where she teamed with Kana under the team name Giann's. The team made it all the way to the finals of the tournament, before losing to Las Aventureras (Ayako Hamada and Yuu Yamagata) in a three-way match, which also included Muscle Venus (Hikaru Shida and Tsukasa Fujimoto). On October 30, Ohka made her third successful defense of the Wave Single Championship against Tomoka Nakagawa, avenging a loss suffered during the 2013 Dual Shock Wave. On November 20, Ohka combined her two tag teams with Hikaru Shida and Kana to form a trio named Shidare Giann's for a 6-Person Tag Tournament. In their first round Two Out of Three Falls match, the three defeated Urayama Arrows (Natsuki Urabe, Rina Yamashita and Yako Fujigasaki). On November 27, Shidare Giann's was eliminated from the tournament in a semifinal submission match by Revolucion Yoko Hatanaka (Gami, Kyoko Kimura and Tomoka Nakagawa). On December 15, Ohka made her fourth successful defense of the Wave Single Championship against Shuu Shibutani. Following Gami's retirement from professional wrestling at the end of 2013, Ohka became the new official representative of Wave. Ohka made her fifth successful defense of the Wave Single Championship on January 26, 2014, when she wrestled Misaki Ohata to a thirty-minute time limit draw. On March 2, Ohka made her sixth successful defense against JWP representative Kayoko Haruyama as part of a storyline rivalry between the two promotions. Ohka's seventh successful title defense took place on April 20, when she defeated Hikaru Shida. From May 5 to June 22, Ohka took part in the round-robin portion of the 2014 Catch the Wave tournament, winning her block with a record of three wins, two draws and one loss, suffered against Tsukasa Fujimoto. On July 27, Ohka was eliminated from the tournament in the semifinals by Misaki Ohata. On August 24, Ohka's seventeen-month reign as the Wave Single Champion came to an end, when she lost the title to the 2014 Catch the Wave winner Hikaru Shida in her eighth defense.