Family name Томацу (Tomatsu 
, Touche 
, Томацу) , in the entire world, is quite a rare surname. The last name Томацу is habitual in Grenada, where it is quite a common surname, Trinidad and Tobago, where it is quite a rare surname, and Mauritius. Not in comparison with a country's population, it most frequently occurs in France, Algeria, and Mexico. Much less frequently, Томацу is the forename as well as the last name.