Miyako Matsumoto
In June 2010, Riho began making appearances for DDT Pro-Wrestling (DDT). On June 13, she teamed with Kenny Omega and Mr. #6 to defeat Mr. Strawberry, Muscle Sakai and O.K. Revolution for the Sea Of Japan 6-Person Tag Team Championship. On July 20, Omega left the championship team, after which the title was declared vacant, before Riho, Mr. #6 and The Great Kojika were announced as the new champions on July 24. The following day, Riho, The Great Kojika and Mr. #6 defeated Hikaru Sato, Keisuke Ishii and Yoshihiko, and Antonio Honda, Kudo and Yasu Urano in a three-way match to retain the Sea Of Japan 6-Person Tag Team Championship and win the Jiyugaoka 6-Person Tag Team Championship and UWA World Trios Championships, unifying the three titles in the process. After defending the Trios Triple Crown Championship against Jaki Numazawa, Jun Kasai and Miyako Matsumoto at an Ice Ribbon event on September 23, Riho, The Great Kojika and Mr. #6 lost the title to Hikaru Sato, Michael Nakazawa and Tomomitsu Matsunaga back in DDT on November 3.