Komatsushima is a city located in Tokushima Prefecture, Japan. As of 30 June 2022, the city had an estimated population of 36,128 in 17181 households and a population density of 800 persons per …Komatsushima is a city located in Tokushima Prefecture, Japan. As of 30 June 2022, the city had an estimated population of 36,128 in 17181 households and a population density of 800 persons per km². The total area of the city is 45.37 square kilometres.