Kōchi is the capital city of Kōchi Prefecture located on the island of Shikoku in Japan. With over 40% of the prefectural population, Kōchi is the main commercial and industrial centre and the "primate city" of the prefecture. As of 1 April 2023, the city had an estimated population of 318,520 in 154,048 households, and a population density of 1,000 persons per km2. The total area of the city is 309.00 square kilometres (119.31 sq mi).

Kōchi Prefecture is a prefecture of Japan located on the island of Shikoku. Kōchi Prefecture has a population of 669,516 and has a geographic area of 7,103 km2. Kōchi Prefecture borders Ehime Prefecture to the northwest and Tokushima Prefecture to the northeast.