is a city located in Akita Prefecture, Japan.As of May 2015, the city had an estimated population of 25,530, and a population density of 106 persons per km². The total area is 241.13sqkm.GeographyNikaho is located at the far southwest corner of Akita Prefecture, bordered by the Sea of Japan to the west, and by Yamagata Prefecture to the south. Part of the city is within the borders of the Chōkai Quasi-National Park.Neighboring municipalitiesAkita PrefectureYurihonjō, AkitaYuza, YamagataClimateNikaho has a Humid continental climate (Köppen climate classification Cfa) with large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. Precipitation significant throughout the year, but is heaviest from August to October.HistoryThe area of present-day Nikaho was part of ancient Ugo Province, dominated by the Satake clan during the Edo period, who ruled Kubota Domain under the Tokugawa shogunate. After the start of the Meiji period, it became part of Yuri District, Akita Prefecture in 1878.