Niihama
is a city located in the eastern part of Ehime Prefecture, Japan. , the city had an estimated population of 115,824 in 57781 households and a population density of 490 persons per km². The total area of the city is . It has the third largest population in Ehime, behind the prefectural capital of Matsuyama and the recently expanded city of Imabari. It is famous for its Besshi copper mine as well as the annual Niihama Taiko Festival (also known as "The Man Festival", otokomatsuri 男祭り) that is the center of annual drunken and boisterous activity and draws tourists from around the country. Geography Niihama is positioned in the north-center area of the island of Shikoku, in the eastern part of Ehime Prefecture. Niihama is enveloped by mountains to the south and east, hills to the west, and the Seto Inland Sea to the north. The Kokuryo River flows from the mountains to the Seto Inland Sea and divides the city into an areas east of the river (kawahigashi) and west of the river (kawanishi). Being surrounded by mountains, Niihama feels geographically isolated from its closest neighbors, Saijō to the west and Shikokuchūō to the east. The border with Kōchi