Cognomen Хаясака (Hayasaka 
, Хаясака 
, Yabusaka 
) , in the entire world, is a rare surname. The family name Хаясака is habitual in Japan, where it is a rare surname, Brazil, where it is a very rare surname, and Myanmar. Measured by absolute frequency, it is commonest in Japan, Brazil, and the United States. Very seldom, Хаясака is the forename as well as the last name.