Thanks to this world map that shows the density of people with the surname Sawada in different countries, you can get an idea not only of the popularity of the surname Sawada in each country but also of the different migrations of people surnamed Sawada.
The quantity of people with the surname Sawada that we can find in each country can help us discern the origin of the surname Sawada, as logic tells us that the place with the most people surnamed Sawada will be the country or area of origin of the surname Sawada.