Sukumo is a city located in Kōchi Prefecture, Japan. As of 31 July 2022, the city had an estimated population of 19,292 in 9966 households, a…Sukumo is a city located in Kōchi Prefecture, Japan. As of 31 July 2022, the city had an estimated population of 19,292 in 9966 households, and a population density of 67 persons per km². The total area of the city is 286.20 square kilometres.