Meanwhile, Shida also continued teaming with Aja Kong in Oz Academy and, after two more losses, picked up her first win in the promotion on March 17, when she pinned Sonoko Kato in a tag team match, where she and Kong faced Kato and Dynamite Kansai. Following the win, Shida and Kong were named number one contenders to the Oz Academy Tag Team Championship, however, prior to the title match, the two faced off in another singles match on April 14, where Kong was again victorious in an attempt to toughen Shida up for the title challenge. On April 24, Shida and Kong defeated Hiroyo Matsumoto and Tomoka Nakagawa to become the new Oz Academy Tag Team Champions. On May 25, Shida also became a tag team champion in her home promotion, when she and Tsukasa Fujimoto defeated Aoi Kizuki and Tsukushi for the International Ribbon Tag Team and Reina World Tag Team Championships. Two days later, Shida and Fujimoto relinquished the Reina World Tag Team Championship and returned the title to the Reina Joshi Puroresu promotion, which had recently undergone a change in management. Shida and Fujimoto made their first successful defense of the International Ribbon Tag Team Championship on June 22 against BBA38 (Cherry and Meari Naito). From May 15 to June 28, Shida took part in Pro Wrestling Wave's 2013 Catch the Wave tournament, finishing with a record of two wins, two draws and two losses and failing to advance from her round-robin block. Back in Ice Ribbon, Shida earned a big win on July 14 by defeating Syuri, who was making her first appearance for the promotion in over two years and with whom she had wrestled to a time limit draw during the 2013 Catch the Wave. The following day, Shida and Yumi Ohka defeated Triple Tails.S (Kana and Mio Shirai) to win the Wave Tag Team Championship, meaning that Shida now held three tag team championships simultaneously in three different promotions. On July 26, Shida made her debut for Pro Wrestling Zero1, teaming with Aja Kong in a tag team match, where they defeated Dynamite Kansai and Yuhi. On August 11, Shida and Kong lost the Oz Academy Tag Team Championship back to Matsumoto and Nakagawa in their first defense. Four days later, Shida also lost the Wave Tag Team Championship, when she and Ohka were defeated by Nakagawa and Gami. On August 18, Shida made an appearance for DDT Pro-Wrestling at the promotion's annual event in Ryōgoku Kokugikan, taking part in the debut match of Saki Akai, alongside whom she had acted in the Muscle Girl! television drama. Shida teamed with Hiroshi Fukuda and Yoshiko in a six-person tag team match, where they were defeated by Akai, Cherry and Masa Takanashi. On September 22, Shida and Fujimoto made their second successful defense of the International Ribbon Tag Team Championship against Mio Shirai and Rutsuko Yamaguchi. From September 1 to October 6, Shida and Fujimoto took part in Pro Wrestling Wave's 2013 Dual Shock Wave tournament, where they made it all the way to the finals, before losing to Ayako Hamada and Yuu Yamagata in a three-way match, which also included Kana and Yumi Ohka. On October 17, Shida took part in a big generational eight-on-eight elimination match promoted by Sendai Girls' Pro Wrestling, where she, Kagetsu, Manami Katsu, Sareee, Syuri, Takumi Iroha, Yoshiko and Yuhi defeated Aja Kong, Command Bolshoi, Dump Matsumoto, Dynamite Kansai, Kyoko Inoue, Manami Toyota, Meiko Satomura and Takako Inoue. Shida eliminated Bolshoi from the match, before being eliminated herself by Toyota. On October 19, Shida made her American debut for Shimmer Women Athletes in Berwyn, Illinois, defeating Mia Yim as part of Volume 58. Later that same day on Volume 59, Shida was defeated by Nicole Matthews, after being hit with her own shinai. This led to a rematch on the following day's Volume 60, where Shida defeated Matthews in a match, where usage of the shinai was legal. Shida finished her weekend and first American visit, losing to Madison Eagles on Volume 61 in a three-way match, which also included Kana. On December 7, Shida and Fujimoto made their third successful defense of the International Ribbon Tag Team Championship against the team of Hamuko Hoshi and Kurumi.