Surname Масамори (Masamori 
, Масамори) , throughout the world, is a rare family name. The surname Масамори is characteristic of Japan, where it is a rare surname, the United States, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Japan, the United States, and China. Much less frequently, Масамори is the forename as well as the last name.