Around the world, Tosan (Tosan 
, توسان 
) is quite a rare unisex first name. The first name Tosan is habitual in Nigeria, where it is a rare unisex name, Japan, where it is a rare male name, and Indonesia. Not in comparison with a country's population, the name is most common in Nigeria, India, and Indonesia. Also, Tosan is the last name as well as the forename.