Toshiki Kuroiwa (黒岩 俊喜) (born August 31, 1993 in Yokohama) is a Japanese bobsledder. Kuroiwa competed at the 2014 Winter Olympics for Japan. He teamed with driver Hiroshi Suzuki, Shintaro Sato and Hisashi Miyazaki in the four-man event, finishing 26th. Kuroiwa made his World Cup debut in December 2013. As of April 2014, his best finish is 19th, in a four-man event in 2012-13 at Lake Placid.