is a

district A district is a type of administrative division that, in some countries, is managed by the local government. Across the world, areas known as "districts" vary greatly in size, spanning regions or counties, several municipalities, subdivisions o ...

located in

Niigata Prefecture is a Prefectures of Japan, prefecture in the Chūbu region of Honshu of Japan. Niigata Prefecture has a population of 2,227,496 (1 July 2019) and is the List of Japanese prefectures by area, fifth-largest prefecture of Japan by geographic area ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. As of July 1, 2019, the district has an estimated

population Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world. Governments typically quantify the size of the resident population within their jurisdiction using a ...

of 4,578 with a

density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematical ...

of 174 persons per km². The total area is 26.27 km².

Municipalities

The district consists of only one village: *

Kariwa is a village located in Niigata Prefecture, Japan. , the village had an estimated population of 4,578 in 1613 households, and a population density of 174 persons per km². The total area of the village was . Geography Kariwa is located in centr ...

;Notes:

History

The district (excluding the west side of Kashiwazaki) was once part of the now-defunct Koshi District until the

Heian period The is the last division of classical Japanese history, running from 794 to 1185. It followed the Nara period, beginning when the 50th emperor, Emperor Kanmu, moved the capital of Japan to Heian-kyō (modern Kyoto). means "peace" in Japanese. ...

when the district was created under the name of Mishima District. Prior to the split, Mishima District covered the cities of Kashiwazaki (excluding the western part of the city, being the areas of Agewa (Kamiwa), Takaze (Takahane) and Warabino from the former municipality of Kakizaki) and Nagaoka (parts of the former towns of Oguni and Koshiji), and the village of

. When Santō District split off from Koshi District during the

Edo period The or is the period between 1603 and 1867 in the history of Japan, when Japan was under the rule of the Tokugawa shogunate and the country's 300 regional '' daimyo''. Emerging from the chaos of the Sengoku period, the Edo period was characteriz ...

, Mishima was renamed to Kariwa. In 1940, the town of Kashiwazaki became a city. After Kashiwazaki merged the surrounding areas, the district continued on to shrink. On April 1, 2005, the town of Oguni merged into the city of Nagaoka; and a month later, the towns of Nishiyama and Takayanagi merged into the city of Kashiwazaki. With this merger, Kariwa District has only the village of

left.

District Timeline

Recent mergers

* On April 1, 2005 - The town of Oguni was merged into the expanded city of Nagaoka. * On May 1, 2005 - The towns of Nishiyama and Takayanagi were merged into the expanded city of Kashiwazaki. Districts in Niigata Prefecture {{Niigata-geo-stub