Mergers from April 1, 1999 to Present

• On January 1, 2005 - the city of Usuki
  Usuki, Oita
  is a city located on the east coast of Ōita Prefecture, Japan. It is famous for its Usuki Stone Buddhas, a national treasure, and its soy sauce production. Recently it has become known for having the look and feel of a Japanese castle town...
  
   and the town of Notsu
  Notsu, Oita
  was a town located in Ōno District, Ōita, Japan.On January 1, 2005 Notsu was merged into the expanded city of Usuki.As of 2003, the town had an estimated population of 9,309 and the density of 66.88 persons per km². The total area was 139.19 km²....
  
   from Ōno District
  Ono District, Oita
  ' was a district located in Ōita Prefecture, Japan.As of January 1, 2005 the district had 6 towns and 2 villages.* Asaji* Chitose* Inukai* Kiyokawa* Mie* Notsu* Ogata* Ōno...
  
   merged to form the city of Usuki
  Usuki, Oita
  is a city located on the east coast of Ōita Prefecture, Japan. It is famous for its Usuki Stone Buddhas, a national treasure, and its soy sauce production. Recently it has become known for having the look and feel of a Japanese castle town...
  
  .

• On January 1, 2005 - the towns of Notsuharu
  Notsuharu, Oita
  was a town located in Ōita District, Ōita, Japan.On January 1, 2005 Notsuharu, along with the town of Saganoseki, from Kitaamabe District, was merged with the expanded city of Ōita....
  
   from Ōita District
  Oita District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 40,723 and density of 99.35 persons per km². The total area was 409.90 km².-Dissolution:As of January 1, 2005 the district had 4 towns.* Hasama* Notsuharu...
  
   and Saganoseki
  Saganoseki, Oita
  was a town located in Kitaamabe District, Ōita, Japan.On January 1, 2005 Saganoseki, along with the town of Notsuharu, from Ōita District, was merged with the expanded city of Ōita....
  
   from Kitaamabe District
  Kitaamabe District, Oita
  ' was a district located in Ōita, Japan.The district had only the town of Saganoseki until December 31, 2004. But on January 1, 2005 Saganoseki, along with the town of Notsuharu, from Ōita District, merged into the expanded city of Ōita, and the district was dissolved.-Municipal Timeline:* July 22,...
  
   merged into the city of Ōita
  Oita, Oita
  is the capital city of Ōita Prefecture located on the island of Kyushu, Japan.- Demographics and geography :Ōita is the most populous city in Ōita Prefecture...
  
  . Kitaamabe District
  Kitaamabe District, Oita
  ' was a district located in Ōita, Japan.The district had only the town of Saganoseki until December 31, 2004. But on January 1, 2005 Saganoseki, along with the town of Notsuharu, from Ōita District, merged into the expanded city of Ōita, and the district was dissolved.-Municipal Timeline:* July 22,...
  
   was dissolved with this merger.

• On March 1, 2005 - the municipalities of Hon'yabakei, Sankō
  Sanko, Oita
  was a village located in Shimoge District, Ōita, Japan.On March 1, 2005 Sankō, along with the towns of Hon'yabakei, Yabakei and Yamakuni, all from Shimoge District, was merged into the expanded city of Nakatsu....
  
  , Yabakei
  Yabakei, Oita
  was a town located in Shimoge District, Ōita, Japan.On March 1, 2005 Yabakei, along with the towns of Hon'yabakei and Yamakuni, and the village of Sankō, all from Shimoge District, was merged into the expanded city of Nakatsu....
  
   and Yamakuni
  Yamakuni, Oita
  was a town located in Shimoge District, Ōita, Japan.On March 1, 2005 Yamakuni, along with the towns of Hon'yabakei and Yabakei, and the village of Sankō, all from Shimoge District, was merged into the expanded city of Nakatsu....
  
   from Shimoge District
  Shimoge District, Oita
  was a district located in Ōita, Japan. On March 1, 2005, the district was dissolved when the four towns that it comprised were absorbed by Nakatsu City....
  
   merged into the city of Nakatsu
  Nakatsu, Oita
  is a city located on the northern border of Ōita Prefecture in Kyūshū, Japan. The city is situated on the border with Fukuoka Prefecture.The city was founded on April 20, 1929. As of 2008, the city has an estimated population of 84,179, with a population density of 171 people per km²...
  
  . Shimoge District
  Shimoge District, Oita
  was a district located in Ōita, Japan. On March 1, 2005, the district was dissolved when the four towns that it comprised were absorbed by Nakatsu City....
  
   was dissolved with this merger.

• On March 3, 2005 - the city of Saiki
  Saiki, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the former city had an estimated population of 49,183 and the density of 249.19 persons per km²...
  
   and the municipalities of Honjō
  Honjo, Oita
  was a village located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Honjō, along with the towns of Kamae, Kamiura, Tsurumi, Ume and Yayoi, and the villages of Naokawa and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
  , Kamae
  Kamae, Oita
  was a town located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Kamae, along with the towns of Kamiura, Tsurumi, Ume and Yayoi, and the villages of Honjō, Naokawa and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
  , Kamiura
  Kamiura, Oita
  was a town located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Kamiura, along with the towns of Kamae, Tsurumi, Ume and Yayoi, and the villages of Honjō, Naokawa and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
  , Naokawa
  Naokawa, Oita
  was a village located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Naokawa, along with the towns of Kamae, Kamiura, Tsurumi, Ume and Yayoi, and the villages of Honjō and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
  , Tsurumi
  Tsurumi, Oita
  was a town located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Tsurumi, along with the towns of Kamae, Kamiura, Ume and Yayoi, and the villages of Honjō, Naokawa and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
  , Ume
  Ume, Oita
  was a town located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Ume, along with the towns of Kamae, Kamiura, Tsurumi and Yayoi, and the villages of Honjō, Naokawa and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
  , Yayoi
  Yayoi, Oita
  was a town located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Yayoi, along with the towns of Kamae, Kamiura, Tsurumi and Ume, and the villages of Honjō, Naokawa and Yonōzu, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
   and Yonōzu
  Yonozu, Oita
  was a village located in Minamiamabe District, Ōita, Japan.On March 3, 2005 Yonōzu, along with the towns of Kamae, Kamiura, Tsurumi, Ume and Yayoi, and the villages of Honjō and Naokawa, all from Minamiamabe District, was merged into the expanded city of Saiki....
  
   (all from Minamiamabe District
  Minamiamabe District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 33,239 and the density of 47.09 persons per km². The total area was 705.90 km²....
  
  ) merged to form the city of Saiki
  Saiki, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the former city had an estimated population of 49,183 and the density of 249.19 persons per km²...
  
  . Minamiamabe District
  Minamiamabe District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 33,239 and the density of 47.09 persons per km². The total area was 705.90 km²....
  
   was dissolved with this merger.

• On March 22, 2005 - the municipalities of Amagase
  Amagase, Oita
  was a town located in Hita District, Ōita, Japan.On March 22, 2005 Amagase, along with the town of Ōyama, and the villages of Kamitsue, Maetsue and Nakatsue, all from Hita District, was merged into the expanded city of Hita....
  
  , Kamitsue
  Kamitsue, Oita
  was a village located in Hita District, Ōita, Japan.On March 22, 2005 Kamitsue, along with the towns of Amagase and Ōyama, and the villages of Maetsue and Nakatsue, all from Hita District, was merged into the expanded city of Hita....
  
  , Maetsue
  Maetsue, Oita
  was a village located in Hita District, Ōita, Japan.On March 22, 2005 Maetsue, along with the towns of Amagase and Ōyama, and the villages of Kamitsue and Nakatsue, all from Hita District, was merged into the expanded city of Hita....
  
  , Nakatsue
  Nakatsue, Oita
  was a village located in Hita District, Ōita, Japan.On March 22, 2005 Nakatsue, along with the towns of Amagase and Ōyama, and the villages of Kamitsue and Maetsue, all from Hita District, was merged into the expanded city of Hita....
  
   and Ōyama
  Oyama, Oita
  was a town located in Hita District, Ōita, Japan.On March 22, 2005 Ōyama, along with the town of Amagase, and the villages of Kamitsue, Maetsue and Nakatsue, all from Hita District, was merged into the expanded city of Hita....
  
   (all from Hita District
  Hita District, Oita
  was a district located in Ōita, Japan.In 2003, the district had an estimated population of 14,180 and the density of 35.72 persons per km². The total area was 396.98 km²....
  
  ) merged into the city of Hita
  Hita, Oita
  is a city in Ōita Prefecture, Japan, that was founded on December 11, 1940. It is an agricultural and industrial centre that primarily produces lumber, furniture, and pottery...
  
  . Hita District
  Hita District, Oita
  was a district located in Ōita, Japan.In 2003, the district had an estimated population of 14,180 and the density of 35.72 persons per km². The total area was 396.98 km²....
  
   was dissolved with this merger.

• On March 31, 2005 - the municipalities of Asaji
  Asaji, Oita
  was a town located in Ōno District, Ōita, Japan.On March 31, 2005 Asaji was merged with the towns of Inukai, Mie, Ogata and Ōno, and the villages of Chitose and Kiyokawa, all from Ōno District, to form the new city of Bungo-Ōno....
  
  , Chitose
  Chitose, Oita
  was a village located in Ōno District, Ōita, Japan.On March 31, 2005 Chitose was merged with the towns of Asaji, Inukai, Mie, Ogata and Ōno, and the village of Kiyokawa, all from Ōno District, to form the new city of Bungo-Ōno....
  
  , Inukai
  Inukai, Oita
  was a town located in Ōno District, Ōita, Japan.On March 31, 2005 Inukai was merged with the towns of Asaji, Mie, Ogata and Ōno, and the villages of Chitose and Kiyokawa, all from Ōno District, to form the new city of Bungo-Ōno....
  
  , Kiyokawa
  Kiyokawa, Oita
  was a village located in Ōno District, Ōita, Japan.On March 31, 2005 Kiyokawa was merged with the towns of Asaji, Inukai, Mie, Ogata and Ōno, and the village of Chitose, all from Ōno District, to form the new city of Bungo-Ōno....
  
  , Mie
  Mie, Oita
  was a town located in Ōno District, Ōita, Japan.On March 31, 2005 Mie was merged with the towns of Asaji, Inukai, Ogata and Ōno, and the villages of Chitose and Kiyokawa, all from Ōno District, to form the new city of Bungo-Ōno....
  
  , Ogata
  Ogata, Oita
  was a town located in Ōno District, Ōita, Japan.On March 31, 2005 Ogata was merged with the towns of Asaji, Inukai, Mie and Ōno, and the villages of Chitose and Kiyokawa, all from Ōno District, to form the new city of Bungo-Ōno....
  
   and Ōno
  Ono, Oita
  was a town located in Ōno District, Ōita Prefecture, Japan.On March 31, 2005 Ōno was merged with the towns of Asaji, Inukai, Mie and Ogata, and the villages of Chitose and Kiyokawa, all from Ōno District, to form the new city of Bungo-Ōno....
  
   (all from Ōno District
  Ono District, Oita
  ' was a district located in Ōita Prefecture, Japan.As of January 1, 2005 the district had 6 towns and 2 villages.* Asaji* Chitose* Inukai* Kiyokawa* Mie* Notsu* Ogata* Ōno...
  
  ) merged to form the new city of Bungo-ōno
  Bungo-ono, Oita
  is a city located in Ōita Prefecture, Japan.The city was founded on March 31, 2005 as a result of the merger between the municipalities of Asaji, Chitose, Inukai, Kiyokawa, Mie, Ogata and Ōno ....
  
  . Ōno District
  Ono District, Oita
  ' was a district located in Ōita Prefecture, Japan.As of January 1, 2005 the district had 6 towns and 2 villages.* Asaji* Chitose* Inukai* Kiyokawa* Mie* Notsu* Ogata* Ōno...
  
   was dissolved with this merger.

• On March 31, 2005 - the city of Usa
  Usa, Oita
  ' is a city located in Ōita Prefecture, Japan. Usa is famous for being the location of the Usa Shrine, built in 725, the head shrine of all of Hachiman shrines in Japan.Usa is made up of three areas.*Usa, the area surrounding the Usa Shrine...
  
   and the towns of Ajimu
  Ajimu, Oita
  was a town located in Usa District, Ōita, Japan.On March 31, 2005 Ajimu, along with the town of Innai, also from Usa District, was merged into the expanded city of Usa....
  
   and Innai
  Innai, Oita
  was a town located in Usa District, Ōita, Japan.On March 31, 2005 Innai, along with the town of Ajimu, also from Usa District, was merged into the expanded city of Usa....
  
   (both from Usa District
  Usa District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 12,739 and the density of 48.85 persons per km². The total area was 260.79 km².-District Timeline:...
  
  ) merged to form the city of Usa
  Usa, Oita
  ' is a city located in Ōita Prefecture, Japan. Usa is famous for being the location of the Usa Shrine, built in 725, the head shrine of all of Hachiman shrines in Japan.Usa is made up of three areas.*Usa, the area surrounding the Usa Shrine...
  
  . Usa District
  Usa District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 12,739 and the density of 48.85 persons per km². The total area was 260.79 km².-District Timeline:...
  
   was dissolved with this merger.

• On March 31, 2005 - the city of Bungotakada
  Bungotakada, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the city has an estimated population of 18,239 and the density of 146.42 persons per km². The total area is 124.57 km²....
  
   and the towns of Kakaji
  Kakaji, Oita
  was a town located in Nishikunisaki District, Ōita, Japan.On March 31, 2005 Kakaji, along with the town of Matama, also from Nishikunisaki District, was merged into the expanded city of Bungotakada....
  
   and Matama
  Matama, Oita
  was a town located in Nishikunisaki District, Ōita, Japan.On March 31, 2005 Matama, along with the town of Kakaji, also from Nishikunisaki District, was merged into the expanded city of Bungotakada....
  
   (both from Nishikunisaki District
  Nishikunisaki District, Oita
  was a district located in Ōita, Japan.The district was dissolved on October 1, 2005.-District Timeline:* July 22, 1878 - Nishikunisaki District was founded after Kunisaki District broke off into Nishikunisaki and Higashikunisaki Districts....
  
  ) merged to form the city of Bungotakada
  Bungotakada, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the city has an estimated population of 18,239 and the density of 146.42 persons per km². The total area is 124.57 km²....
  
  .

• On April 1, 2005 - the city of Taketa
  Taketa, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the city has an estimated population of 16,807 and a density of 83.69 persons per km². The total area is 200.83 km²....
  
   and the towns of Kujū
  Kuju, Oita
  was a town located in Naoiri District, Ōita, Japan.On April 1, 2005 Kujū, along with the towns of Naoiri and Ogi, all from Naoiri District, was merged into the expanded city of Taketa....
  
  , Naoiri
  Naoiri, Oita
  was a town located in Naoiri District, Ōita, Japan.On April 1, 2005 Naoiri, along with the towns of Kujū and Ogi, all from Naoiri District, was merged into the expanded city of Taketa....
  
   and Ogi
  Ogi, Oita
  was a town located in Naoiri District, Ōita, Japan.On April 1, 2005 Ogi, along with the towns of Kujū and Naoiri, all from Naoiri District, was merged into the expanded city of Taketa....
  
   (all from Naoiri District
  Naoiri District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 10,956 and the density of 39.58 persons per km². The total area was 276.84 km².-District Timeline:...
  
  ) merged to form the city of Taketa
  Taketa, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the city has an estimated population of 16,807 and a density of 83.69 persons per km². The total area is 200.83 km²....
  
  . Naoiri District
  Naoiri District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 10,956 and the density of 39.58 persons per km². The total area was 276.84 km².-District Timeline:...
  
   was dissolved with this merger.

• On October 1, 2005 - Despite further opposition, the towns of Hasama
  Hasama, Oita
  was a town located in Ōita District, Ōita, Japan.On October 1, 2005 Hasama was merged with the towns of Shōnai and Yufuin, all from Ōita District, to form the new city of Yufu....
  
  , Shōnai
  Shonai, Oita
  was a town located in Ōita District, Ōita, Japan.On October 1, 2005 Shōnai was merged with the towns of Hasama and Yufuin, all from Ōita District, to form the city of Yufu....
  
   and Yufuin
  Yufuin, Oita
  is a district of the city of Yufu, Ōita, Japan.Yufuin was a town located in Ōita District until October 1, 2005, when Yufuin was merged with the towns of Hasama and Shōnai, all from Ōita District, to form the new city of Yufu....
  
   (all from Ōita District
  Oita District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 40,723 and density of 99.35 persons per km². The total area was 409.90 km².-Dissolution:As of January 1, 2005 the district had 4 towns.* Hasama* Notsuharu...
  
  ) merged to form the new city of Yufu
  Yufu, Oita
  is a city located in Ōita Prefecture, Japan.The city was founded on October 1, 2005 as a result of the merger between the towns of Hasama, Shōnai and Yufuin, all from Ōita District....
  
  . Ōita District
  Oita District, Oita
  was a district located in Ōita, Japan.As of 2003, the district had an estimated population of 40,723 and density of 99.35 persons per km². The total area was 409.90 km².-Dissolution:As of January 1, 2005 the district had 4 towns.* Hasama* Notsuharu...
  
   was dissolved with this merger.

• On October 1, 2005 - the city of Kitsuki
  Kitsuki, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the city has an estimated population of 22,955 and the density of 254.43 persons per km². The total area is 90.22 km².The city was founded on April 1, 1955.-External links:*...
  
   and the village of Ōta
  Ota, Oita
  was a village located in Nishikunisaki District, Ōita, Japan.On October 1, 2005 Ōta, along with the town of Yamaga, from Hayami District, was merged into the expanded city of Kitsuki....
  
   from Nishikunisaki District
  Nishikunisaki District, Oita
  was a district located in Ōita, Japan.The district was dissolved on October 1, 2005.-District Timeline:* July 22, 1878 - Nishikunisaki District was founded after Kunisaki District broke off into Nishikunisaki and Higashikunisaki Districts....
  
   and the town of Yamaga
  Yamaga, Oita
  was a town located in Hayami District, Ōita, Japan.On October 1, 2005 Yamaga, along with the village of Ōta, from Nishikunisaki District, was merged into the expanded city of Kitsuki....
  
   from Hayami District
  Hayami District, Oita
  ' is a district located in Ōita Prefecture, Japan.As of 2003, the district has an estimated population of 35,462 and the density of 163.46 persons per km². The total area is 216.94 km².-Merger:...
  
   merged to form the city of Kitsuki
  Kitsuki, Oita
  is a city located in Ōita Prefecture, Japan.As of 2003, the city has an estimated population of 22,955 and the density of 254.43 persons per km². The total area is 90.22 km².The city was founded on April 1, 1955.-External links:*...
  
  . Nishikunisaki District
  Nishikunisaki District, Oita
  was a district located in Ōita, Japan.The district was dissolved on October 1, 2005.-District Timeline:* July 22, 1878 - Nishikunisaki District was founded after Kunisaki District broke off into Nishikunisaki and Higashikunisaki Districts....
  
   was dissolved with this merger.

• On March 31, 2006 - the towns of Aki
  Aki, Oita
  was a town located in Higashikunisaki District, Ōita, Japan.On March 31, 2006 Aki was merged with the towns of Kunisaki , Kunimi and Musashi, all from Higashikunisaki District, to form the new city of Kunisaki....
  
  , Kunimi
  Kunimi, Oita
  was a town located in Higashikunisaki District, Ōita, Japan.On March 31, 2006 Kunimi was merged with the towns of Kunisaki , Aki and Musashi, all from Higashikunisaki District, to form the new city of Kunisaki....
  
  , Kunisaki
  Kunisaki, Oita (town)
  was a town located in Higashikunisaki District, Ōita, Japan.On March 31, 2006 Kunisaki absorbed the towns of Aki, Kunimi and Musashi, all from Higashikunisaki District, to become the new city of Kunisaki....
  
   and Musashi
  Musashi, Oita
  was a town located in Higashikunisaki District, Ōita, Japan.On March 31, 2006 Musashi was merged with the towns of Kunisaki , Aki and Kunimi, all from Higashikunisaki District, to form the new city of Kunisaki....
  
   from Higashikunisaki District
  Higashikunisaki District, Oita
  ' is a district located in Ōita Prefecture, Japan.As of April 2006, the district has an estimated population of 2,898. The total area is now down to 6.75 km².There is only one village left in the district.*Himeshima...
  
   merged to form the new city of Kunisaki
  Kunisaki, Oita
  is a city located in Ōita Prefecture, Japan.Kunisaki City was founded on March 31, 2006, as a result of the merger between the towns of Kunisaki , Aki, Kunimi and Musashi, all from Higashikunisaki District....
  
  .