Katō is a city in Hyōgo Prefecture, Japan. As of 30 April 2022, the city had an estimated population of 39,628 in 17199 households and a popula…Katō is a city in Hyōgo Prefecture, Japan. As of 30 April 2022, the city had an estimated population of 39,628 in 17199 households and a population density of 250 persons per km². The total area of the city is 157.55 square kilometres.