Surname Ясунари (安成 
, Yasunari 
, Ясунари 
) , in the entire world, is quite a rare cognomen. The surname Ясунари is characteristic of China, where it is a rare surname, Japan, and Singapore, where it is a very rare surname. In absolute terms, it is the most numerous in China, Japan, and Spain. More prevalently, Ясунари is the forename as well as the last name.