Emi Sakura
On October 24, 2008, Riho won her first professional wrestling championship, when she teamed with Yuki Sato to defeat Chounko and Masako Takanashi for the International Ribbon Tag Team Championship. On December 23, Riho was entered into a tournament to determine the inaugural ICE×60 Champion, but was eliminated in the semifinals by Seina, who would go on to become the champion. After successfully defending the International Ribbon Tag Team Championship against Emi Sakura and Ribbon Takanashi, Riho and Sato vacated the title, after Riho fractured her right leg on March 31, 2009. For most of 2009, Riho was involved in a storyline rivalry with Chii Tomiya, which eventually led to the two forming the tag team Miniature Dachs in November. On November 28, 2009, Riho defeated Nanae Takahashi and Tsukasa Fujimoto to become the inaugural Triangle Ribbon Champion. After one successful title defense, Riho lost the title to Miyako Matsumoto on March 22, 2010. However, just twelve days later, Riho came back to defeat Matsumoto for the ICE×60 Championship, the promotion's top title. In the process, Riho also became Ice Ribbon's first Triple Crown Champion. During the post-match celebration, Riho nominated her trainer Emi Sakura as her first challenger for the belt. On May 3 at "Golden Ribbon", Riho became the youngest person to ever main event a show in Korakuen Hall, when she lost the ICE×60 Championship to Sakura in her first defense, ending her title reign at just 30 days.