Yokkaichi (四日市市, Yokkaichi-shi) is a city located in Mie Prefecture, Japan. As of 1 August 2021[update], the city had an estimated population of 310,259 in 142162 households and a population density of 1500 persons per km2.[1] The total area of the city is 206.44 square kilometres (79.71 sq mi). Yokkaichi is located in the north-central of Mie Prefecture, part of the northeastern Kii Peninsula. It stretches the width of Mie Prefecture, and is bordered by Ise Bay on the Pacific Ocean to the east, and Shiga Prefecture to the northwest. Mie Prefecture