Historic Map of Nitta District:
1. Ōta, 2. Kuai, 3.Sawano, 4. Ojima, 5. Serada, 6. Kizaki, 7. Hosen, 8. Torinogo, 9. Godo, 10. Izushina, 11.Watauchi 12. Yabuzukahonmachi, 12.Kasakake was formerly a

rural district Rural districts were a type of local government area – now superseded – established at the end of the 19th century in England, Wales, and Ireland for the administration of predominantly rural areas at a level lower than that of the Ad ...

located in

Gunma Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Gunma Prefecture has a population of 1,937,626 (1 October 2019) and has a geographic area of 6,362 km2 (2,456 sq mi). Gunma Prefecture borders Niigata Prefecture and Fukushima ...

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 ...

. Most of the city Ōta and parts of the cities of

Midori Midori (みどり, ミドリ, , , ) is the Japanese word for "green" and may refer to: Places * Midori, Gunma * Midori-ku, Chiba * Midori-ku, Nagoya * Midori-ku, Sagamihara * Midori-ku, Saitama * Midori-ku, Yokohama People Given name * M ...

and Isesaki were formerly part of the district Nitta District was created on December 7, 1878, with the reorganization of Gunma Prefecture into districts. It included one town (Ōta) and 96 villages, which were formerly part of the ''

tenryō The Tokugawa shogunate (, Japanese 徳川幕府 ''Tokugawa bakufu''), also known as the , was the military government of Japan during the Edo period from 1603 to 1868. Nussbaum, Louis-Frédéric. (2005)"''Tokugawa-jidai''"in ''Japan Encyclopedia ...

'' holdings in

Kōzuke Province was a province of Japan in the area of Japan that is today Gunma Prefecture. Kōzuke bordered by Echigo, Shinano, Musashi and Shimotsuke Provinces. Its abbreviated form name was . Under the ''Engishiki'' classification system, Kōzuke was ran ...

under the direct administration of the

Tokugawa shogunate The Tokugawa shogunate (, Japanese 徳川幕府 ''Tokugawa bakufu''), also known as the , was the military government of Japan during the Edo period from 1603 to 1868. Nussbaum, Louis-Frédéric. (2005)"''Tokugawa-jidai''"in ''Japan Encyclopedia ...

or administered by ''

hatamoto A was a high ranking 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 ...

,'' 12 villages under

Maebashi Domain 270px, Monument making location of Maebashi Castle, headquarters of Maebashi Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Kōzuke Province (modern-day Gunma Prefecture), Japan. It was centered on Maebas ...

, and one village each under Tatebayshi Domain,

Okabe Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Musashi Province (modern-day Saitama Prefecture), Japan. It was centered on Okabe ''jin'ya'' in what is now part of the city of Fukaya, Saitama. History The Abe c ...

(Musashi Province), and

Sano Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan, located in Shimotsuke Province (modern-day Tochigi Prefecture), Japan. It was centered in what is now part of the city of Sano, Tochigi. Sano was ruled through most of its hist ...

(Shimotsuke Province) and two villages under Nishibata Domain (Mikawa Province). With the establishment of the municipalities system on April 1, 1889, the area was organized into four towns (Ota, Kizaki, Yabuzukahon, and Ojima) and 9 villages (Kasakake, Kuai, Sawano, Torinosato, Namashina, Watauchi, Kyodo, Serada and Hosen).

History

* April 1, 1940 - The town of Ōta and the villages of Kokonoai and Sawano were merged with the village of Nirakawa (from Yamada District) to create the town of Ōta. (4 towns, 7 villages) * November 1, 1943 - The village of Torinosato was merged into the town of Ōta. (4 towns, 6 villages) * May 3, 1948 - The town of Ōta was elevated to city status. (3 towns, 6 villages) * September 30, 1956 - The town of Kizaki and the villages of Namashima and Watauchi were merged to create the town of Nitta. (3 towns, 4 villages) * April 1, 1957 - The village of Kyodo was merged into the city of Ota. (3 towns, 3 villages) * November 1, 1957 - The village of Serada had split and was merged into the town of

Sakai is a city located in Osaka Prefecture, Japan. It has been one of the largest and most important seaports of Japan since the medieval era. Sakai is known for its keyhole-shaped burial mounds, or kofun, which date from the fifth century and inclu ...

(in Sawa District, now the city of Isesaki) and the town of Ojima, respectively. (3 towns, 2 villages) * April 1, 1963 - The village of Hosen was merged into the city of Ōta. (3 towns, 1 village) * April 1, 1990 - The village of Kasakake was elevated to town status. (4 towns) * March 28, 2005 - The towns of Nitta, Ojima and Yabuzukahon were merged into the expanded city of Ōta. (1 town) * March 27, 2006 - The town of Kasakake was merged with the town of Ōmama (from Yamada District), and the village of

Azuma Azuma may refer to: Places * Azuma, historical name for eastern Japan, now called Kantō region, Kantō and Tōhoku region * Azuma, Gunma (Agatsuma), former village in Agatsuma District, Gunma Prefecture, Japan * Azuma, Gunma (Sawa), former villag ...

(from Seta District) to create the city of

. Nitta District was dissolved as a result of this merger. left, Map showing location of Nitta District within Gunma Prefecture {{Authority control Former districts of Gunma Prefecture