Cognomen Мацуока (Komakichi 
, Matsuoka 
, Yasukowa ) , all over the world, is quite a rare family name. The last name Мацуока is habitual in Paraguay, where it is quite a rare surname, Hong Kong, and Japan, where it is a rare surname. In absolute terms, it most frequently occurs in Brazil, Japan, and the United States. More prevalently, Мацуока is the forename as well as the last name.