History

• April 1, 1889 - Due to the municipal status enforcement, the villages of Chōsa, Kajiki, Gamo, Mizobe, Shigetomi and Yamada were created within Aira District. (6 villages)
• April 1, 1897 – Aira District merges with Nishisoo(the villages of Fukuyama, Kokubu, Nishikokubu, Higashikokubu, Shikine, Shimizu, and Higashi襲山村) and Kuwahara Districts (the villages of Kurino, Yoshimatsu, Makizono, Yokogawa, Nishi襲山村). (18 villages)
• June 1, 1912 – The villages of Kajiki gained town status. (1 town, 17 villages)
• April 1, 1926 – The village of Kokubu gained town status. (2 towns, 16 villages)
• November 1, 1928 – The village of Kamou gained town status. (3 towns, 15 villages)
• October 10, 1929 – The village of Nishikokubu gained town status and renamed to become the town of Hayato
  Hayato, Kagoshima
  was a town located in Aira District, Kagoshima, Japan.On November 7, 2005 Hayato was merged with the towns of Kirishima , Fukuyama, Makizono, Mizobe and Yokogawa, all from Aira District, and the old city of Kokubu, to form the new city of Kirishima and no longer exists as an independent...
  
  . (4 towns, 14 villages)
• November 1, 1929 – The village of Fukuyama gained town status. (5 towns, 13 villages)
• November 1, 1930 – The village of 西襲山村 renamed the village of Hinatayama.
• April 1, 1932 – The village of Kurino gained town status. (6 towns, 12 villages)
• July 10, 1935 – The village of 東襲山村 renamed the village of Kirishima.
• February 16, 1940 – The town of Yokogawa gained town status. (7 towns, 11 villages)
• April 1, 1940 – The village of Makizono gained town status. (8 towns, 10 villages)
• April 1, 1942 – The village of Chōsa gained town status. (9 towns, 9 villages)
• April 1, 1950 – The village of 東襲山村 separated from the village of Kirishima. (9 towns, 10 villages)
• February 11, 1953 – The village of Yoshimatsu gained town status. (10 towns, 9 villages)
• May 3, 1953 – The village of Hinatayama gained town status. (11 towns, 8 villages)
• April 1, 1954 (10 towns, 6 villages)
  • The town of Kokubu and the villages of 東襲山村 and a part of Shimizu merged to form the town of Kokubu.
  • The town of Hayato and Hinatayama, and the remaining parts of village of Shimizu merged to form the town of Hayatohinatayama.
• May 10, 1954 - the town of Kokubu, and the villges of Higashikokubu and Shikine merged to form the town of Kokubu. (10 towns, 4 villages)
• January 1, 1955(10 towns, 2 villages)
  • The town of Chōsa, the village of Shigetomi, and parts of the village of Yamada merged to form the town of Aira.
  • The remaining parts of the village of Yamada merged into the town of Kamō.
• February 1, 1955 – The town of Kokubu gained city status.(9 towns, 2 villages)
• April 1, 1957 – The town of Hayatohinatayama changed their name to the town of Hayato.
  • November 3, 1958 – The village of Kirishima gained town status.(10 towns, 1 village)
  • April 1, 1959 – The village of Mizobe gained town status.(11 towns)
• March 22, 2005– The towns of Kurino and Yoshimatsu merged to form the town of Yūsui
  Yusui, Kagoshima
  is a town located in Aira District, Kagoshima, Japan.As of September 1, 2011, the town has an estimated population of 11,420 and the density of 79.1 persons per km²...
  
  .(10 towns)
• November 7, 2005 – The towns of Hayato
  Hayato, Kagoshima
  was a town located in Aira District, Kagoshima, Japan.On November 7, 2005 Hayato was merged with the towns of Kirishima , Fukuyama, Makizono, Mizobe and Yokogawa, all from Aira District, and the old city of Kokubu, to form the new city of Kirishima and no longer exists as an independent...
  
  , Fukuyama
  Fukuyama, Kagoshima
  was a town located in Aira District, Kagoshima, Japan.On November 7, 2005 Fukuyama was merged with the towns of Kirishima , Hayato, Makizono, Mizobe and Yokogawa, all from Aira District, and the old city of Kokubu, to form the new city of Kirishima and no longer exists as an independent...
  
  , Kirishima
  Kirishima, Kagoshima (town)
  Kirishima was a town in Aira District, Kagoshima, Japan.Prior to the merger, the town had a population of 5,795 and the density of 70.21 people/km². The total area was 82.54 km²...
  
  , Mizobe
  Mizobe, Kagoshima
  Mizobe was a town located in Aira District, Kagoshima, Japan.On November 7, 2005 Mizobe was merged with the towns of Kirishima , Fukuyama, Hayato, Makizono and Yokogawa, all from Aira District, and the old city of Kokubu, to form the new city of Kirishima and no longer exists as an independent...
  
  , Yokogawa
  Yokogawa, Kagoshima
  was a town located in Aira District, Kagoshima, Japan.On November 7, 2005 Yokogawa was merged with the towns of Kirishima , Fukuyama, Hayato, Makizono and Mizobe, all from Aira District, and the old city of Kokubu, to form the new city of Kirishima and no longer exists as an independent...
  
  , and Makizono
  Makizono, Kagoshima
  Makizono was a town located in Aira District, Kagoshima, Japan.On November 7, 2005 Makizono was merged with the towns of Kirishima , Fukuyama, Hayato, Mizobe and Yokogawa, all from Aira District, and the old city of Kokubu, to form the new city of Kirishima and no longer exists as an independent...
  
   merged with the city of Kokubu
  Kokubu, Kagoshima
  Kokubu was a city located in Kagoshima, Japan.On November 7, 2005 Kobuku was merged with the towns of Kirishima , Fukuyama, Hayato, Makizono, Mizobe and Yokogawa, all from Aira District, to form the new city of Kirishima and no longer exists as an independent municipality.As of 2003, the city had...
  
   to form the city of Kirishima (4 towns)
• A planned merger of municipalities
  Merger and dissolution of municipalities of Japan
  Municipal mergers and dissolutions carried out in Japan can take place within one municipality or between multiple municipalities and are required to be based upon consensus.- Merger policy:...
  
   will be implemented on March 23, 2010. The Aira District towns of Aira
  Aira, Kagoshima (town)
  was a town located in Aira District, in Kagoshima, Japan. It was located west of Kajiki and north of Kagoshima.A planned merger of municipalities will be implemented on March 23, 2010. The Aira District towns of Aira, Kajiki, and Kamō merged to form the new city of Aira...
  
  , Kajiki
  Kajiki, Kagoshima
  was a town located in Aira District, Kagoshima, Japan. It was located north of the city of Kagoshima. Kajiki was located on the northern part of the bay. Kagoshima Airport is to the north....
  
  , and Kamō merged to form the city of Aira
  Aira, Kagoshima (Aira)
  is a city in Kagoshima, Japan. It is located west of Kirishima and north of Kagoshima. The city was founded on March 23, 2010 by merger of municipalties from Kajiki, Aira, Kamō. As of May 2010, the city has an estimated population of 74,611 and the density of 323 persons per km². The total area is...
  
  . Aira District will be left with one municipality.