Last name Хираи (Hirai 
, Хираи 
) , all around the world, is quite a rare family name. The family name Хираи is habitual in Hong Kong, where it is quite a rare surname, Paraguay, and North Macedonia, where it is a rare surname. In absolute terms, this name is the most popular in Brazil, Japan, and the United States. Also, Хираи is the forename as well as the last name.