Kotohira is a town located in Nakatado District, Kagawa Prefecture, Japan. As of 1 October 2022, the town had an estimated population of 8,105 in 3618 households and a population density of 960 persons per km2. The total area of the town is 8.47 square kilometres (3.27 sq mi). The town is best known as the site of Shikoku's largest shrine complex, the Kotohira Shrine.

Kagawa Prefecture is a prefecture of Japan located on the island of Shikoku. Kagawa Prefecture has a population of 949,358 and is the smallest prefecture by geographic area at 1,877 square kilometres (725 sq mi). Kagawa Prefecture borders Ehime Prefecture to the southwest and Tokushima Prefecture to the south.