Tomoka Nakagawa is a Japanese retired professional wrestler. After being trained by Taka Michinoku, she started her career in his Kaientai Dojo promotion in September 2004. After leaving Kaientai Dojo in 2007, Nakagawa briefly joined Ibuki, where she underwent further training under Mariko Yoshida, before becoming a freelancer and starting to work on the Japanese independent circuit for promotions such as Oz Academy and Pro Wrestling Wave. She also became a regular for American promotion SHIMMER Women Athletes. Nakagawa was a decorated tag team wrestler, becoming a one-time FMW/WEW Hardcore Tag Team Champion, three-time Oz Academy Tag Team Champion, two-time SHIMMER Tag Team Champions and a three-time Wave Tag Team Champion. As a singles wrestler, she held the Smash Diva Championship. After a ten-year career, Nakagawa announced her retirement from professional wrestling in June 2014. After a Japanese retirement match in December 2014, Nakagawa wrestled her final match in the United States on April 12, 2015.

The Wave Tag Team Championship is a professional wrestling tag team championship owned by the Pro Wrestling Wave promotion. The title is nicknamed "Dual Shock Wave". The championship was first announced on August 28, 2011, at Wave's fourth anniversary event, and the first champions were crowned on October 30, when kanAyu defeated Uematsu☆Ran to win the Dual Shock Wave 2011 tournament and become the inaugural champions. From 2009 to 2010, Wave had promoted matches for the TLW World Young Women's Tag Team Championship, but this was the first title officially created and owned by the promotion. Though primarily contested for by female wrestlers, one male team, Yankii Nichokenju, has also held the title.