Cognomen Ясуюки (Yasuyuki 
, Ясуюки 
) , around the globe, is quite a rare last name. The cognomen Ясуюки is habitual in Japan, where it is a rare surname, Taiwan, and Singapore. Measured by absolute frequency, it is commonest in Eastern Asia, particularly Japan, China, and Taiwan. Also, Ясуюки is the forename as well as the last name.