Yuko Kavaguti (also: Kawaguchi, Japanese: Kawaguchi Yūko (川口 悠子), Russian: Юко Кавагути, born 20 November 1981) is a retired pair skater who has represented Japan and Russia in international competition. In 2006, she began competing with Alexander Smirnov for Russia. They are two-time European champions (2010, 2015), two-time World bronze medalists (2009, 2010), two-time ISU Grand Prix Final bronze medalists (11–12 and 15–16), and three-time Russian national champions (2008–2010). In 2015, they became the first pair in history to complete two quadruple throw jumps in one program and the first to land a quadruple throw loop.