Surname ไซโต้ (Saito 
, ไซโต้) , in the world, is a common cognomen. The surname ไซโต้ is characteristic of Japan, where it is quite a rare surname, Brazil, and Singapore. In absolute terms, the name is most common in Brazil, Japan, and the United States. Very seldom, ไซโต้ is the forename as well as the last name.