Surname Masashi (仁 
, Masashi 
, Масаши 
) , in the entire world, is a common cognomen. The cognomen Masashi is characteristic of China, where it is quite a rare surname, Japan, and Singapore, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in China, Japan, and Indonesia. Likewise, Masashi is the forename as well as the last name.