Ōkawa (大川村, Ōkawa-mura) is a village located in Tosa District, Kōchi Prefecture, Japan. As of 30 June 2022, the village had an estimated population of 363 in 214 households and a population density of 3.8 persons per km². The total area of the village is 95.27 square kilometres (36.78 sq mi). Okawa is the least populated municipality in Japan, excluding municipalities affected by the 2011 Fukushima nuclear disaster and municipalities on excluded islands. Ōkawa is located in the Shikoku Mountains in the northern part of Kochi Prefecture, bordering Ehime. The Yoshino River flows through the village from west to east. The former center of the village was submerged due to the completion and flooding of the Sameura Dam, located in nearby Motoyama. Currently, the Komatsu area on the shore of the dam lake has the village office. More information...
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