Ryunosuke Harada (原田 龍之介, Harada Ryunosuke, born May 6, 1985 in Nagasaki) is a Japanese sailor, who specialized in two-person dinghy (470) class. He shared gold medals with his partner Yugo Yoshida in the 470 class at the 2010 Asian Games, and later the pair represented Japan at the 2012 Summer Olympics. As throughout most of his sailing career, Harada currently trains for the ABeam Consulting Team under his personal coach and mentor Kazunori Komatsu. As of September 2013, Harada is ranked no. 190 in the world for two-person dinghy class by the International Sailing Federation.