Surname Хирахара (平原 
, Hirahara 
, Хирахара) , in all the world, is quite a rare cognomen. The cognomen Хирахара is habitual in China, where it is a rare surname, Singapore, and the United States, where it is a very rare surname. In absolute terms, the name is most common in China, the United States, and Brazil. More prevalently, Хирахара is the forename as well as the last name.