Nitta District, Gunma

Nitta (新田郡, Nitta-gun) was a district located in Gunma Prefecture, Japan.

Towns and villages were part of the district (before the current mergers)

Kasakake -> part of the city of Midori since March 27, 2006
Nitta -> part of the city of Ota since March 28, 2005
Ojima -> part of the city of Ota since March 28, 2005
Yabuzukahon -> part of the city of Ota since March 28, 2005

(As of October 2004, the district had a population of 93,500)

District timeline

April 1, 1889 - When the town and village status enforced, the district founded four towns (Ota, Kizaki, Yabuzukahonmachi, and Ojima) and 9 villages (Kasakake, Kuai, Sawano, Torinosato, Namashina, Watauchi, Kyodo, Serada and Hosen).
April 1, 1940 - The town of Ota and the villages of Kokonoai and Sawano were merged with the village of Nirakawa (from Yamada District) to create the town of Ota. (4 towns, 7 villages)
November 1, 1943 - The village of Torinosato was merged into the town of Ota. (4 towns, 6 villages)
May 3, 1948 - The town of Ota 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 (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 Ota. (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 Ota. (1 town)
March 27, 2006 - The town of Kasakake was merged with the town of Ōmama (from Yamada District), and the village of Azuma (from Seta District) to create the city of Midori. Nitta District was dissolved as a result of this merger.