Last name ヒロキ (Hiroki 
, ヒロキ ) , across the world, is a widespread cognomen. The surname ヒロキ is characteristic of Japan, where it is a common surname, Singapore, where it is a rare surname, and New Zealand. In absolute terms, it most frequently occurs in Japan, China, and Brazil. Much less frequently, ヒロキ is the forename as well as the last name.