Yuji Hirayama (平山ユージ; born February 23, 1969) is a Japanese rock climber specializing in lead climbing competitions.

[2] He is notable for being the first-ever climber to onsight an 8c (5.14b) route, and for his various speed records on El Capitan.

[4] On September 29, 2002, Hirayama and Hans Florine climbed The Nose in 2:48:55, setting a new speed record.

On 2005 Aug 10, Tomas Mrazek had the 2nd 8c onsight, Pata Negra at Rodellar in eastern Spain.

In 2012, he freed a multi-pitch route called Pogulian Do Koduduo in the Mount Kinabalu National Park in Borneo with one pitch at 9a.