is a district located in Niigata Prefecture, Japan. As of July 1, 2019, the district has an estimated population of 14,025 with a density of 373 persons per km2. The total area is 37.58 km2. Towns and villages On September 1, 2005 - the town of Nakajō and the village of Kurokawa merged to form the city of Tainai. Seirō. History On January 1, 1947 - the town of Shibata became a city. After it gained city status, Shibata and Niigata merged to form the city known as Shibata. The surrounding areas and the district continued to lose more areas. On November 1, 1970 - the town of Toyosaka (part of Niigata as of March 21, 2005) gained city status. On July 7, 2003 - the town of Toyoura merged into the city of Shibata. On April 1, 2004 - the towns of Suibara and Yasuda, and the villages of Kyogase and Sasakami merged to create the city of Agano. On May 1, 2005 - the town of Shiunji and the village of Kajikawa were also merged into the city of Shibata. On September 1, 2005 - the town of Nakajō and the village of Kurokawa merged to form the city of Tainai; which left Seirō as the only town in Kitakanbara District. External links 新発田市・紫雲寺町・加治川村合併協議会 中条町・黒川村合併協議会 Districts in Niigata Prefecture