is an administrative district of Japan

Districts of Japan

The was most recently used as an administrative unit in Japan between 1878 and 1921 and is roughly equivalent to the county of the United States, ranking at the level below prefecture and above city, town or village. As of 2008, cities belong directly to prefectures and are independent from...

 located in central Kanagawa Prefecture

Kanagawa Prefecture

is a prefecture located in the southern Kantō region of Japan. The capital is Yokohama. Kanagawa is part of the Greater Tokyo Area.-History:The prefecture has some archaeological sites going back to the Jōmon period...

. It currently consists of two towns, Ōiso

Oiso, Kanagawa

is a town located in Naka District, Kanagawa Prefecture, Japan. As of 2010, the town had an estimated population of 32,725 and a density of 1,910 persons per km². The total area was 17.18 km².-Geography:...

, and Ninomiya

Ninomiya, Kanagawa

is a town located in Naka District, Kanagawa Prefecture, Japan. As of 2010, the town had an estimated population of 29,709 and a density of 3,270 persons per km²...

.

History

Naka District was one of the four subdivisions of Sagami Province

Sagami Province

was an old province in the area that is today the central and western Kanagawa prefecture. It was sometimes called . Sagami bordered on Izu, Musashi, Suruga provinces; and had access to the Pacific Ocean through Sagami Bay...

 established by the late Hōjō clan

Late Hojo clan

The ' was one of the most powerful warrior clans in Japan in the Sengoku period and held domains primarily in the Kantō region.The clan is traditionally reckoned to be started by Ise Shinkurō, who came from a branch of the prestigious Ise clan, a family in the direct employment of the Ashikaga...

 of Odawara

Odawara, Kanagawa

is a city located in western Kanagawa Prefecture, Japan. As of 2010, the city had an estimated population of 198,466 with a population density of 1,740 persons per km² . The total area was .-Geography:...

 during the Sengoku period

Sengoku period

The or Warring States period in Japanese history was a time of social upheaval, political intrigue, and nearly constant military conflict that lasted roughly from the middle of the 15th century to the beginning of the 17th century. The name "Sengoku" was adopted by Japanese historians in reference...

. In the Edo period

Edo period

The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

, it was nominally part of Odawara Domain

Odawara Domain

was a Japanese domain of the Edo period, located in western Sagami Province. It was centered on Odawara Castle in what is now the city of Odawara.-History:...

, although large portions were tenryō territory controlled by the Shogun

Shogun

A was one of the hereditary military dictators of Japan from 1192 to 1867. In this period, the shoguns, or their shikken regents , were the de facto rulers of Japan though they were nominally appointed by the emperor...

 in Edo

Edo

, also romanized as Yedo or Yeddo, is the former name of the Japanese capital Tokyo, and was the seat of power for the Tokugawa shogunate which ruled Japan from 1603 to 1868...

 through various hatamoto

Hatamoto

A was a samurai in the direct service of the Tokugawa shogunate of feudal Japan. While all three of the shogunates in Japanese history had official retainers, in the two preceding ones, they were referred to as gokenin. However, in the Edo period, hatamoto were the upper vassals of the Tokugawa...

. After the Meiji Restoration

Meiji Restoration

The , also known as the Meiji Ishin, Revolution, Reform or Renewal, was a chain of events that restored imperial rule to Japan in 1868...

 and with the establishment of the district system in 1878, the territory came under the control of and . On March 26, 1896 these two districts were joined to form the modern Naka District, which initially consisted of five towns and 23 villages. Hiratsuka was elevated to city status in 1932, followed by Hadano in 1955 and Isehara in 1971.

As of 2009, the district had an estimated population

Population

A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...

 of 62,522 and a density

Population density

Population density is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, and particularly to humans...

 of 2,380 persons per km². The total area was 26.26 km².

Towns and villages

• Ninomiya
  Ninomiya, Kanagawa
  is a town located in Naka District, Kanagawa Prefecture, Japan. As of 2010, the town had an estimated population of 29,709 and a density of 3,270 persons per km²...
  
  
• Ōiso
  Oiso, Kanagawa
  is a town located in Naka District, Kanagawa Prefecture, Japan. As of 2010, the town had an estimated population of 32,725 and a density of 1,910 persons per km². The total area was 17.18 km².-Geography:...
  
  

before 1889	April 1, 1889	1889 - 1926	1926 – 1944			1945 - 1954		1955 - 1989		1989 - Present	Present
Ashigarakami District	Ashigarakami Ashigarakami District, Kanagawa is an administrative district of Japan located in western Kanagawa Prefecture. Most of the mountainous district is sparsely populated, and is part of the Tanzawa-Ōyama Quasi-National Park.-History:... Kamihadano village	Ashigarakami District Kamihadano village	Ashigarakami District Kamihadano village			Ashigarakami District Kamihadano village		July 28, 1955 Nishihadano town	January 1, 1963 merged into Hadano city	Hadano city	Hadano Hadano, Kanagawa is a city in west-central Kanagawa Prefecture, Japan. As of February 2010, Hadano has an estimated population of 170,293 and a population density of 1,640 persons per km²; it had a total area of 103.61 km².-Geography:...
Ōsumi District	Nishihadano village	Nishihadano village	Nishihadano village			Nishihadano village
	Hadano town	Hadano town	Hadano town			Hadano town		January 1, 1955 Hadano city
	Kitahadano village	Kitahadano village	Kitahadano village			Kitahadano village
	Higashihadano village	Higashihadano village	Higashihadano village			Higashihadano village
	Minamihadano village	Minamihadano village	June 1, 1940 Minamihadano town			Minamihadano town
	Ōne town	Ōne town	Ōne town			Ōne town		April 15, 1955 merged with Hadano city （except Sanada area）
								March 2, 1955 merged with Kaneda village （Sanada area）	October 1, 1957 merged into Hiratsuka city	Hiratsuka city	Hiratsuka Hiratsuka, Kanagawa is a city located in Kanagawa Prefecture, Japan. As of 2010, the city had an estimated population of 259,991 and the density of 3,830 persons per km²...
	Kaname village	Kaname village	Kaname village			Kaname village		Kaname village
	Hiratsuka town	Hiratsuka town	Hiratsuka town		April 1, 1932 Hiratsuka city	Hiratsuka city		Hiratsuka city
	Suma village	Suma village	January 1, 1927 Suma town	April 1, 1929 merged into Hiratsuka town
	Konaka village	April 1, 1909 Asahi village	Asahi village			July 15, 1954 merged into Hiratsuka city
Yurugi District	Yamashiro village
Ōsumi District	Ōno village	Ōno village	February 11, 1944 Ōno town			Ōno town		Ōno town	September 30, 1956 merged into Hiratsuka city
	Toyoda village	Toyoda village	Toyoda village			Toyoda village		April 1, 1956 merged into Ōno town
	Kanda village	Kanda village	Kanda village			Kanda village		September 30, 1956 merged into Hiratsuka city
	Jōjima village	Jōjima village	Jōjima village			Jōjima village
	Kaneda village	Kaneda village	Kaneda village			Kaneda village
	Tsuchizawa village	Tsuchizawa village	Tsuchizawa village			Tsuchizawa village
	Okazaki village	Okazaki village	Okazaki village			Okazaki village		September 30, 1956 merged into Hiratsuka city （except Mawatari・Ōku areas）
								September 30, 1956 merged into Isehara city （Mawatari・Ōku areas）	March 1, 1971 Isehara city	Isehara city	Isehara Isehara, Kanagawa is a city located in central Kanagawa Prefecture, Japan. As of 2010, Isehara had an estimated population of 100,976 and a density of 1,820 persons per km². The total area was 55.52 km². There is School of Medicine, Tokai University.-Geography:...
	Isehara town	Isehara town	Isehara town			December 1, 1954 Isehara town		Isehara town
	Naruse village	Naruse village	Naruse village
	Ōta village	Ōta village	Ōta village
	Takabeya village	Takabeya village	Takabeya village
	Ōyama town	Ōyama town	Ōyama town
	Hibita village	Hibita village	Hibita village
	Aikawa village	Aikawa village	Aikawa village			Aikawa village		July 8, 1955 merged into Atsugi city		Atsugi city	Atsugi Atsugi, Kanagawa is a city located in central Kanagawa Prefecture, Japan. As of 2010, the city has an estimated population of 225,622 and a population density of 2,410 persons per km². The total area was 93.83 km²...
Yurugi District	Ōiso town	Ōiso town	Ōiso town			Ōiso town	December 1, 1954 Ōiso town	Ōiso town		Ōiso town	Ōiso Oiso, Kanagawa is a town located in Naka District, Kanagawa Prefecture, Japan. As of 2010, the town had an estimated population of 32,725 and a density of 1,910 persons per km². The total area was 17.18 km².-Geography:...
	Kōzu village	Kōzu village	Kōzu village			April 1, 1952 Kōzu town
	Azuma village	Azuma village	November 3, 1935 Ninomiya town			Ninomiya town		Ninomiya town		Ninomiya town	Ninomiya Ninomiya, Kanagawa is a town located in Naka District, Kanagawa Prefecture, Japan. As of 2010, the town had an estimated population of 29,709 and a density of 3,270 persons per km²...