Yu Nakajima (中島 悠?, born February 15, 1991 in Ebetsu, Hokkaidō) is a Japanese Rubik's Cube solver.
Yu held the former world record for average time solving a Rubik's Cube (11.28 seconds) and formerly held it for a single time solution (8.72 seconds) on the standard 3×3×3 cube solution. He beat the previous world record holder Edouard Chambon, who had a single solve record of 9.18 seconds. Both records were set on May 5, 2008, at the Kashiwa Open 2008. He set the World Record on the 5x5x5 at 54.86 seconds in April. On May 23, 2008 Yu posted a video on YouTube where he completed the cube in 6.57 seconds.He solved the Rubik's magic in 1.05 seconds.