The Aja are an ancient ethnic group, formed by the union of various ethnic groups, who have been forced to long migrations due to wars, natural disasters or power struggles.
The Aja were the head of a powerful kingdom, the Kingdom of Tado, as a result of its fall the inhabitants moved to other areas, looking for better living conditions and founded other cities and gave birth to new ethnic groups, mingling with other populations, among these the best known are the Fon.
Today the Aja are a group of about 500,000 people, they are a population of farmers occupying a large area between Togo and Benin.