Last name 麹 (Koji 
, 국 
, Qū 
) , worldwide, is a common cognomen. The family name 麹 is habitual in South Korea, where it is quite a rare surname, Montenegro, and Japan. Measured by absolute frequency, it most frequently occurs in Eastern Asia, particularly Japan, South Korea, and China. Likewise, 麹 is the forename as well as the last name.