Yuki Sunaga (?? ??, Sunaga Yuki, born December 28, 1980 in Sakado, Saitama) is a Japanese windsurfer, who specialized in Neil Pryde RS:X class.
As of September 2013, Sunaga is ranked no.
53 in the world for the sailboard class by the International Sailing Federation.
Sunaga competed in the women's RS:X class at the 2012 Summer Olympics in London by finishing thirty-third and receiving a berth from the ISAF World Championships in Perth, Western Australia.
Struggling to attain a top position in the opening series, Sunaga accumulated a net score of 180 points for a twenty-first-place finish in a fleet of twenty-six windsurfers.