At the 2008 Summer Olympics in Beijing, Kamata qualified for the Japanese sailing squad, as a crew member in the women's 470 class. Despite missing out the podium by the narrowest of margins, she and skipper Kondo managed to secure one of the twelve places offered at the 2007 ISAF Worlds in Cascais, Portugal. Entered the Qingdao regatta as the newly-crowned world ranking leaders, the Japanese duo had a terrible performance at the initial half of the series with marks lower than the top ten. They staged a magnificent comeback on the second half by winning races 6 and 9, but another technical error on the last leg saw both Kamata and Kondo tumble down the leaderboard to a lowly fourteenth overall with 93 net points.