Mergers before April 1, 1999

• On September 1, 1995 - the town of Kashima and the village of Ōno
  Ōno, Ibaraki
  was a village located in Kashima District, Ibaraki, Japan.On September 1, 1995 Ōno was merged with the town of Kashima, also from Kashima District, to form the new city of Kashima....
  
   from Kashima District
  Kashima District, Ibaraki
  Kashima was a former district located in Ibaraki, Japan.As of 2003, the district had an estimated population of 141,935 and a density of 404.21 persons per km²...
  
   merged to form the new city of Kashima
  Kashima, Ibaraki
  is a port city located in Ibaraki Prefecture, Japan.As of October 1, 2010, the city has an estimated population of 66,249 and a population density of 708.02 persons per km². The total area is 93.57 km². Kashima was formerly a town in Kashima District and became a city after merging with the...
  
  .

Mergers from April 1, 1999 to Present

• On April 1, 2001 - the towns of Itako and Ushibori
  Ushibori, Ibaraki
  Ushibori was a town located in Namegata District, Ibaraki, Japan.On April 1, 2001 Ushibori was merged with the town of Itako, also from Namegata District, to form the new city of Itako and no longer exists as an independent municipality....
  
   from Namegata District
  Namegata District, Ibaraki
  was a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 40,930 and a density of 246.08 persons per km². The total area is 166.33 km²....
  
   merged to form the new city of Itako
  Itako, Ibaraki
  is a city located in Ibaraki Prefecture, Japan. Itako was formerly a town in Namegata District and became a city after merging with the neighboring town of Ushibori on April 1, 2001....
  
  .

• On February 2, 2002 - the town of Moriya
  Moriya, Ibaraki
  is a city located in Ibaraki, Japan.As of May 1, 2011, the city has an estimated population of 62,716, with a household number of 23,311, and the density of 1,760.20 persons per km². The total area is 35.63 km²...
  
  was promoted to city status.

• On October 16, 2004 - the village of Gozenyama
  Gozenyama, Ibaraki
  was a village located in Higashiibaraki District, Ibaraki, Japan.On October 16, 2004 Gozenyama was merged with the town of Yamagata, also from Higashiibaraki District, the town of Ōmiya, and the villages of Miwa and Ogawa, all from Naka District, to form the new city of Hitachiōmiya and no longer...
  
   and the town of Yamagata from Higashiibaraki District
  Higashiibaraki District, Ibaraki
  is a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 122,478 and a density of 284 persons per km². The total area is 431.44 km².-Towns and villages:*Ibaraki*Ōarai*Shirosato-Mergers:...
  
   merged with the town of Ōmiya and the villages of Miwa and Ogawa
  Ogawa, Ibaraki
  Ogawa, Ibaraki may refer to:* Ogawa-machi, town in Higashiibaraki District, Ibaraki Prefecture* Ogawa-mura, village in Naka District, Ibaraki Prefecture...
  
   from Naka District
  Naka District, Ibaraki
  Naka is a district of Ibaraki, Japan.Following the January 21, 2005 formation of the city of Naka, the district is coextensive with the village of Tōkai. As of January 1, 2005 population data, the district has an estimated population of 35,467 and a density of 946.29 persons per km²...
  
   forming the city of Hitachiōmiya.

• On November 1, 2004 - the town of Jūō in the former Taga District
  Taga District, Ibaraki
  Taga was a district located in Ibaraki, Japan. On November 1, 2004 the only town in the district merged into the neighboring city of Hitachi at which point the district ceased to exist....
  
   merged into the neighboring city of Hitachi
  Hitachi, Ibaraki
  is a city located on the Pacific Ocean in Ibaraki Prefecture, Japan. Its name could be directly translated as "sunrise", but probably more appropriately adapted to "prosperous wealth" .-Demographics:...
  
  . As a result this merger Taga District
  Taga District, Ibaraki
  Taga was a district located in Ibaraki, Japan. On November 1, 2004 the only town in the district merged into the neighboring city of Hitachi at which point the district ceased to exist....
  
   ceased to exist.

• On December 1, 2004 - the following municipalities formerly in Kuji District
  Kuji District, Ibaraki
  Kuji District is a district located in Ibaraki, Japan.-Merger:*On December 1, 2004 the town of Kanasagō, and the villages of Satomi and Suifu merged into the expanded city of Hitachiōta....
  
   merged into the expanded city of Hitachiōta
  Hitachiota, Ibaraki
  is a city located in Ibaraki, Japan.As of May 1, 2011, the city has an estimated population of 55,906, with a household number of 20,298 and the density of 150.28 persons per km²...
  
  : Kanasagō, Satomi
  Satomi, Ibaraki
  was a village located in Kuji District, Ibaraki, Japan.On December 1, 2004 Satomi, along with the town of Kanasagō, and the village of Suifu, all from Kuji District, was merged into the expanded city of Hitachiōta and no longer exists as an independent municipality.As of 2003, the village had an...
  
  , Suifu
  Suifu, Ibaraki
  was a village located in Kuji District, Ibaraki, Japan.On December 1, 2004 Suifu, along with the town of Kanasagō, and the village of Satomi, all from Kuji District, was merged into the expanded city of Hitachiōta and no longer exists as an independent municipality.As of 2003, the village had an...
  
  

• On January 21, 2005 - the towns of Naka and Urizura
  Urizura, Ibaraki
  Urizura was a town located in Naka District, Ibaraki, Japan.On January 21, 2005 Urizura was merged with the town of Naka, also from Naka District, to form the new city of Naka and no longer exists as an independent municipality....
  
   from Naka District
  Naka District, Ibaraki
  Naka is a district of Ibaraki, Japan.Following the January 21, 2005 formation of the city of Naka, the district is coextensive with the village of Tōkai. As of January 1, 2005 population data, the district has an estimated population of 35,467 and a density of 946.29 persons per km²...
  
   merged forming the city of Naka
  Naka, Ibaraki
  is a city located in Ibaraki, Japan. Naka was formerly a town in Naka District and became a city after merging with the neighboring town of Urizura on January 21, 2005....
  
  .

• On February 1, 2005 - the town of Jōhoku
  Johoku, Ibaraki
  Jōhoku was a town located in Higashiibaraki District, Ibaraki, Japan.On February 1, 2005 Jōhoku was merged with the village of Katsura, also from Higashiibaraki District, and the village of Nanakai, from Nishiibaraki District, to form the new town of Shirosato and no longer exists as an...
  
   and village of Katsura
  Katsura, Ibaraki
  Katsura was a village located in Higashiibaraki District, Ibaraki, Japan.On February 1, 2005 Katsura was merged with the town of Jōhoku, also from Higashiibaraki District, and the village of Nanakai, from Nishiibaraki District, to form the new town of Shirosato and no longer exists as an...
  
   from Higashiibaraki District
  Higashiibaraki District, Ibaraki
  is a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 122,478 and a density of 284 persons per km². The total area is 431.44 km².-Towns and villages:*Ibaraki*Ōarai*Shirosato-Mergers:...
  
   merged with the village of Nanakai
  Nanakai, Ibaraki
  Nanakai was a village located in Nishiibaraki District, Ibaraki, Japan.On February 1, 2005 Nanaki was merged with the town of Jōhoku, and the village of Katsura, both from Higashiibaraki District, to form the new town of Shirosato and no longer exists as an independent municipality.As of 2003, the...
  
   from Nishiibaraki District
  Nishiibaraki District, Ibaraki
  Nishiibaraki , literally West Ibaraki, was a district located in Ibaraki, Japan. As of 2004, the district has an estimated population of 52,291...
  
   forming the town of Shirosato
  Shirosato, Ibaraki
  is a town located in Higashiibaraki District, Ibaraki, Japan.The town was formed on February 1, 2005, from the merger of the town of Jōhoku, the village of Katsura, both from Higashiibaraki District, and the village of Nanakai, from Nishiibaraki District....
  
  .

• Also on February 1, 2005 - the town of Uchihara
  Uchihara, Ibaraki
  Uchihara was a town located in Higashiibaraki District, Ibaraki, Japan.On February 1, 2005 Uchihara was merged into the expanded city of Mito and no longer exists as an independent municipality....
  
   from Higashiibaraki District
  Higashiibaraki District, Ibaraki
  is a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 122,478 and a density of 284 persons per km². The total area is 431.44 km².-Towns and villages:*Ibaraki*Ōarai*Shirosato-Mergers:...
  
   merged into the city of Mito
  Mito, Ibaraki
  is the capital of Ibaraki Prefecture, Japan and has a central location, moderately offset towards the coast in that prefecture. As of 2005, the city has an estimated population of 263,748 and a total area is 217.45 km², giving a population density of 1,212.91 persons per km²...
  
  .

• On March 22, 2005 - the following towns and villages from Inashiki District
  Inashiki District, Ibaraki
  is a district located in Ibaraki, Japan.Following the Inashiki merger but as of 2003 population data, the district has an estimated population of 77,059 and a density of 538 persons per km². The total area is 143.32 km².-Mergers:...
  
   merged to form the city of Inashiki
  Inashiki, Ibaraki
  is a city located in Ibaraki, Japan.As of February 1, 2005 the city has an estimated population of 50,142 and a density of 282 persons per km². The total area is 178.12 km²....
  
  : Azuma
  Azuma, Ibaraki
  Azuma was a town located in Inashiki District, Ibaraki, Japan.On March 22, 2005 Azuma was merged with the towns of Edosaki and Shintone, and the village of Sakuragawa, all from Inashiki District, to form the new city of Inashiki and no longer exists as an independent municipality.As of 2003, the...
  
  , Edosaki
  Edosaki, Ibaraki
  Edosaki was a town located in Inashiki District, Ibaraki, Japan.On March 22, 2005 Edosaki was merged with the towns of Azuma and Shintone, and the village of Sakuragawa, all from Inashiki District, to form the new city of Inashiki and no longer exists as an independent municipality.As of 2003, the...
  
  , Sakuragawa, and Shintone
  Shintone, Ibaraki
  Shintone was a town located in Inashiki District, Ibaraki, Japan.On March 22, 2005 Shintone was merged with the towns of Azuma and Edosaki, and the village of Sakuragawa, all from Inashiki District, to form the new city of Inashiki and no longer exists as an independent municipality.In 2003, the...
  
  .

• Also on March 22, 2005 - the town of Sashima
  Sashima, Ibaraki
  Sashima was a town located in Sashima District, Ibaraki, Japan.On March 22, 2005 Sashima was merged with the old city of Iwai, to form the new city of Bandō and no longer exists as an independent municipality....
  
   from Sashima District
  Sashima District, Ibaraki
  Sashima is a district located in Ibaraki, Japan.Following the Bandō merger but with 2004 population data, the district has an estimated population of 125,153 and a density of 726 persons per km²...
  
   merged with the former city of Iwai
  Iwai, Ibaraki
  Iwai was a city located in Ibaraki, Japan.On March 22, 2005 Iwai was merged with the town of Sashima, from Sashima District, to form the new city of Bandō. As of this merger, Iwai no longer exists....
  
   forming the city of Bandō
  Bando, Ibaraki
  is a city located in Ibaraki, Japan.The city was formed on 22 March 2005 from the merger of the old city of Iwai and the town of Sashima, from Sashima District....
  
  .

• On March 28, 2005 - the town of Fujishiro
  Fujishiro, Ibaraki
  Fujishiro was a town located in Kitasōma District, Ibaraki, Japan.On March 28, 2005 Fujishiro was merged into the expanded city of Toride and no longer exists as an independent municipality....
  
   from Kitasōma District merged into the expanded city of Toride
  Toride, Ibaraki
  is a city located in Ibaraki, Japan.As of March 1, 2008 , the city has an estimated population of 109,926 and the density of 1,570 persons per km². The total area is 69.96 km²....
  
  .

• Also on March 28, 2005 - the towns of Akeno
  Akeno, Ibaraki
  Akeno was a town located in Makabe District, Ibaraki, Japan.On March 28, 2005 Akeno was merged with the towns of Kyōwa and Sekijō, all from Makabe District, and the old city of Shimodate, to form the new city of Chikusei...
  
  , Kyōwa
  Kyowa, Ibaraki
  Kyōwa was a town located in Makabe District, Ibaraki, Japan.On March 28, 2005 Kyōwa was merged the towns of Akeno and Sekijō, all from Makabe District, and the old city of Shimodate, to form the new city of Chikusei and no longer exists as an independent municipality.As of 2003, the town had an...
  
  , and Sekijō
  Sekijo, Ibaraki
  Sekijō was a town located in Makabe District, Ibaraki, Japan.On March 28, 2005 Sekijō was merged the towns of Akeno and Kyōwa, all from Makabe District, and the old city of Shimodate, to form the new city of Chikusei and no longer exists as an independent municipality.As of 2003, the town had an...
  
   from Makabe District
  Makabe District, Ibaraki
  Makabe was a district located in Ibaraki, Japan.As of the Chikusei merger, but with 2003 population data, the district had an estimated population of 26,699 and a density of 288 persons per km²...
  
   merged with the former city of Shimodate
  Shimodate, Ibaraki
  Shimodate was a city located in Ibaraki, Japan.On March 28, 2005 Shimodate was merged the towns of Akeno, Kyōwa and Sekijō, all from Makabe District, to form the new city of Chikusei. As of this merger, Shimodate no longer exists....
  
   forming the city of Chikusei
  Chikusei, Ibaraki
  is a city located in Ibaraki, Japan. The city was founded March 28, 2005 from the merger of the towns of Akeno, Kyōwa and Sekijō, and the old city of Shimodate, all from the Makabe District, ....
  
  .

• Also on March 28, 2005 - the towns of Chiyoda
  Chiyoda, Ibaraki
  Chiyoda was a town located in Niihari District, Ibaraki, Japan.On March 28, 2005 Chiyoda was merged with the old town of Kasumigaura, also from Niihari District, to form the new city of Kasugimaura and no longer exists as an independent municipality.As of 2003, the town had an estimated population...
  
   and Kasumigaura
  Kasumigaura, Ibaraki
  is a city located in Ibaraki, Japan. Kasumigaura was formerly a town in Niihari District and became a city on March 28, 2005 after merging with the neighboring town of Chiyoda, also from Niihari District. The city takes its name from the nearby lake, Lake Kasumigaura...
  
   from Niihari District
  Niihari District, Ibaraki
  Niihari was a district located in Ibaraki, Japan. The district was dissolved on March 27, 2006.The district has only one village before dissolution.* Tamari-Timeline :...
  
   merged, forming the city of Kasumigaura
  Kasumigaura, Ibaraki
  is a city located in Ibaraki, Japan. Kasumigaura was formerly a town in Niihari District and became a city on March 28, 2005 after merging with the neighboring town of Chiyoda, also from Niihari District. The city takes its name from the nearby lake, Lake Kasumigaura...
  
  .

• On August 1, 2005 - the towns of Hasaki
  Hasaki, Ibaraki
  Hasaki is an area located in Kamisu City, Ibaraki, Japan.On August 1, 2005 Hasaki was merged with the old town of Kamisu, also from Kashima District, to become the new city of Kamisu....
  
   and Kamisu
  Kamisu, Ibaraki
  is a city located in Ibaraki Prefecture, Japan.Kamisu was a town but proclaimed city on August 1, 2005, when it merged with the town of Hasaki, from Kashima District....
  
   from Kashima District
  Kashima District, Ibaraki
  Kashima was a former district located in Ibaraki, Japan.As of 2003, the district had an estimated population of 141,935 and a density of 404.21 persons per km²...
  
   merged to form the new city of Kamisu
  Kamisu, Ibaraki
  is a city located in Ibaraki Prefecture, Japan.Kamisu was a town but proclaimed city on August 1, 2005, when it merged with the town of Hasaki, from Kashima District....
  
  .

• On September 2, 2005 - the towns of Asō, Kitaura
  Kitaura, Ibaraki
  Kitaura was a town located in Namegata District, Ibaraki, Japan. It is now a part of the city of Namegata.As of 2003, the town had an estimated population of 10,916 and a density of 199.56 persons per km². The total area was 54.70 km²....
  
   and Tamatsukuri
  Tamatsukuri, Ibaraki
  Tamatsukuri was a town located in Namegata District, Ibaraki, Japan. It is now a part of the city of Namegata.As of 2003, the town had an estimated population of 13,793 and a density of 269.13 persons per km². The total area was 51.25 km²....
  
   from Namegata District
  Namegata District, Ibaraki
  was a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 40,930 and a density of 246.08 persons per km². The total area is 166.33 km²....
  
   merged to form the new city of Namegata
  Namegata, Ibaraki
  is a city located in Ibaraki, Japan. The city was formed on September 2, 2005 from the merger of the towns of Asō, Kitaura and Tamatsukuri.As of April 1, 2011 population data, the city has an estimated population of 38,182, with a household number of 11,721 and the density of 229.56 persons per...
  
  . Namegata District
  Namegata District, Ibaraki
  was a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 40,930 and a density of 246.08 persons per km². The total area is 166.33 km²....
  
   was dissolved as a result of this merger.

• On September 12, 2005 - the towns of Sanwa
  Sanwa, Ibaraki
  Sanwa is a town located in Sashima District, Ibaraki, Japan.As of 2003, the town has an estimated population of 39,220 and a density of 787.87 persons per km². The total area is 49.78 km²....
  
   and Sōwa
  Sōwa, Ibaraki
  was a town located in Sashima District, Ibaraki, Japan.As of 2003, the town had an estimated population of 48,810 and a density of 924.43 persons per km². The total area was 52.80 km²....
  
   from Sashima District
  Sashima District, Ibaraki
  Sashima is a district located in Ibaraki, Japan.Following the Bandō merger but with 2004 population data, the district has an estimated population of 125,153 and a density of 726 persons per km²...
  
   merged with the city of Koga
  Koga, Ibaraki
  is a city located in Ibaraki, Japan.-Old City of Koga:The city has its origins in the Tokugawa period when a castle was built in the 16th century at the river crossing point and a town sprang up around it. The site of the castle is still visible near Koga 1st elementary school. The modern city was...
  
   to form the new city of Koga
  Koga, Ibaraki
  is a city located in Ibaraki, Japan.-Old City of Koga:The city has its origins in the Tokugawa period when a castle was built in the 16th century at the river crossing point and a town sprang up around it. The site of the castle is still visible near Koga 1st elementary school. The modern city was...
  
  .

• On October 1, 2005 - the remaining municipalities from Makabe District
  Makabe District, Ibaraki
  Makabe was a district located in Ibaraki, Japan.As of the Chikusei merger, but with 2003 population data, the district had an estimated population of 26,699 and a density of 288 persons per km²...
  
   merged with the town of Iwase
  Iwase, Ibaraki
  Iwase is a town located in Nishiibaraki District, Ibaraki, Japan.As of 2003, the town has an estimated population of 22,378 and a density of 256.75 persons per km²...
  
   from Nishiibaraki District
  Nishiibaraki District, Ibaraki
  Nishiibaraki , literally West Ibaraki, was a district located in Ibaraki, Japan. As of 2004, the district has an estimated population of 52,291...
  
   merged to form the new city of Sakuragawa
  Sakuragawa, Ibaraki
  is a city in Ibaraki, Japan. It was formed on 1 October 2005. It is composed of Iwase-cho in the north, Yamato-mura in the center, and Makabe-cho in the south...
  
  . Makabe District
  Makabe District, Ibaraki
  Makabe was a district located in Ibaraki, Japan.As of the Chikusei merger, but with 2003 population data, the district had an estimated population of 26,699 and a density of 288 persons per km²...
  
   was dissolved as a result of this merger.

• On October 1, 2005 - the town of Yasato
  Yasato, Ibaraki
  Yasato was a town located in Niihari District, Ibaraki, Japan.As of 2003, the town has an estimated population of 30,218 and a density of 196.50 persons per km². The total area is 153.78 km²....
  
   from Niihari District
  Niihari District, Ibaraki
  Niihari was a district located in Ibaraki, Japan. The district was dissolved on March 27, 2006.The district has only one village before dissolution.* Tamari-Timeline :...
  
   merged with the city of Ishioka
  Ishioka, Ibaraki
  is a city located in Ibaraki, Japan.As of 2003, the city has an estimated population of 52,755 and the density of 885.15 persons per km². The total area is 59.60 km².The city was founded on February 11, 1954....
  
   to form the new city of Ishioka
  Ishioka, Ibaraki
  is a city located in Ibaraki, Japan.As of 2003, the city has an estimated population of 52,755 and the density of 885.15 persons per km². The total area is 59.60 km².The city was founded on February 11, 1954....
  
  .

• On October 11, 2005 - the town of Hokota
  Hokota, Ibaraki
  is a city located in Ibaraki Prefecture, Japan.Hokota city was established on October 11, 2005, by the merger of the former town of Hokota, and the villages of Asahi and Taiyō, all from Kashima District....
  
   and the villages of Asahi
  Asahi, Ibaraki
  Asahi was a village located in Kashima District, Ibaraki, Japan.On October 11, 2005 Asahi was merged with the town of Hokota, and the village of Taiyō, all from Kashima District, to become the new city of Hokota....
  
   and Taiyō
  Taiyo, Ibaraki
  Taiyō was a village located in Kashima District, Ibaraki, Japan.On October 11, 2005 Taiyō was merged with the town of Hokota, and the village of Asahi, all from Kashima District, to become the new city of Hokota....
  
   (all from Kashima District
  Kashima District, Ibaraki
  Kashima was a former district located in Ibaraki, Japan.As of 2003, the district had an estimated population of 141,935 and a density of 404.21 persons per km²...
  
  ) merged to form the new city of Hokota
  Hokota, Ibaraki
  is a city located in Ibaraki Prefecture, Japan.Hokota city was established on October 11, 2005, by the merger of the former town of Hokota, and the villages of Asahi and Taiyō, all from Kashima District....
  
  . Kashima District
  Kashima District, Ibaraki
  Kashima was a former district located in Ibaraki, Japan.As of 2003, the district had an estimated population of 141,935 and a density of 404.21 persons per km²...
  
   was dissolved as a result of this merger.

• On January 1, 2006 - the village of Chiyokawa
  Chiyokawa, Ibaraki
  Chiyokawa was a village located in Yūki District, Ibaraki, Japan.As of 2003, the village had an estimated population of 9,589 and a density of 483.56 persons per km². The total area was 19.83 km²....
  
   from Yūki District merged with the city of Shimotsuma
  Shimotsuma, Ibaraki
  is a city located in Ibaraki, Japan. The city was founded on June 1, 1954.In 2003 the estimated population was 37,150. Since the city area is 61.05 km² this gives a population density of 608.52 persons per km²...
  
   to form the new city of Shimotsuma
  Shimotsuma, Ibaraki
  is a city located in Ibaraki, Japan. The city was founded on June 1, 1954.In 2003 the estimated population was 37,150. Since the city area is 61.05 km² this gives a population density of 608.52 persons per km²...
  
  .

• On January 1, 2006 - the town of Ishige
  Ishige, Ibaraki
  Ishige was a town located in Yūki District, Ibaraki, Japan.On January 1, 2006 Ishige was merged into Mitsukaido City and the combined city's name officially became Jōsō....
  
   from Yūki District merged in to the city of Mitsukaido. Mitsukaido changed the name to Jōsō
  Joso, Ibaraki
  is a city located in Ibaraki, Japan.As of 2003, the city has an estimated population of 42,342 and the density of 531.40 persons per km². The total area is 79.68 km².The city was founded as Mitsukaido on July 10, 1954....
  
  at the sametime.

• On February 20, 2006 - the village of Niihari
  Niihari, Ibaraki
  Niihari is a village located in Niihari District, Ibaraki, Japan.As of May 1, 2005, the village had an estimated population of 9,404. The total area was 31.99 km².On February 20, 2006 Niihari was merged into the city of Tsuchiura....
  
   from Niihari District
  Niihari District, Ibaraki
  Niihari was a district located in Ibaraki, Japan. The district was dissolved on March 27, 2006.The district has only one village before dissolution.* Tamari-Timeline :...
  
   merged into the city of Tsuchiura
  Tsuchiura, Ibaraki
  is a city located in Ibaraki prefecture, in Japan. It is situated along the western shores of Lake Kasumigaura, the second largest lake in Japan. Tokyo city lies about 60 km to the south, and Tsukuba science city borders Tsuchiura to the west.-Demographics:...
  
  .

• On March 19, 2006 - the municipalities of Iwama
  Iwama, Ibaraki
  is a small town in Nishiibaraki District, Ibaraki, Japan.On March 19, 2006 Iwama, along with the town of Tomobe, also from Nishiibaraki District, was merged into the expanded city of Kasama.-Geography:...
  
   and Tomobe
  Tomobe, Ibaraki
  Tomobe was a town located in Nishiibaraki District, Ibaraki, Japan.As of 2003, the town had an estimated population of 35,657 and a density of 607.34 persons per km². The total area was 58.71 km²....
  
   (both from Nishiibaraki District
  Nishiibaraki District, Ibaraki
  Nishiibaraki , literally West Ibaraki, was a district located in Ibaraki, Japan. As of 2004, the district has an estimated population of 52,291...
  
  ) merged with Kasama to form the new city of Kasama
  Kasama, Ibaraki
  is a city located in central Ibaraki, Japan.Kasama was once a castle town and post-station town during the Edo Period , and a shrine town of Kasama Inari Shrine in the Meiji Period . Stone quarrying is its main activity...
  
  . Nishiibaraki District
  Nishiibaraki District, Ibaraki
  Nishiibaraki , literally West Ibaraki, was a district located in Ibaraki, Japan. As of 2004, the district has an estimated population of 52,291...
  
   was thereby dissolved.

• On March 27, 2006 - the towns of Ogawa
  Ogawa, Ibaraki
  Ogawa, Ibaraki may refer to:* Ogawa-machi, town in Higashiibaraki District, Ibaraki Prefecture* Ogawa-mura, village in Naka District, Ibaraki Prefecture...
  
   and Minori
  Minori, Ibaraki
  was a town located in Higashiibaraki District, Ibaraki, Japan.On March 27, 2006 Minori was merged with the town of Ogawa, also from Higashiibaraki District, and the village of Tamari, from Niihari District, to form the new city of Omitama....
  
   (both from Higashiibaraki District
  Higashiibaraki District, Ibaraki
  is a district located in Ibaraki, Japan.As of 2003, the district has an estimated population of 122,478 and a density of 284 persons per km². The total area is 431.44 km².-Towns and villages:*Ibaraki*Ōarai*Shirosato-Mergers:...
  
  ) merged with the village of Tamari
  Tamari, Ibaraki
  was a village located in Niihari District, Ibaraki, Japan.On March 27, 2006 Tamari was merged with the towns of Ogawa and Minori, both from Higashiibaraki District, to form the new city of Omitama...
  
   from Niihari District
  Niihari District, Ibaraki
  Niihari was a district located in Ibaraki, Japan. The district was dissolved on March 27, 2006.The district has only one village before dissolution.* Tamari-Timeline :...
  
   to form the new city of Omitama
  Omitama, Ibaraki
  is a city located in Ibaraki, Japan. The city was formed on March 27, 2006 from the merger of the towns of Ogawa and Minori, both from Higashiibaraki District, and the village of Tamari, from Niihari District...
  
  . Niihari District
  Niihari District, Ibaraki
  Niihari was a district located in Ibaraki, Japan. The district was dissolved on March 27, 2006.The district has only one village before dissolution.* Tamari-Timeline :...
  
   was dissolved as a result of this merger.

• On March 27, 2006 - the town of Ina
  Ina, Ibaraki
  Ina is a town located in Tsukuba District, Ibaraki, Japan.As of 2003, the town had an estimated population of 25,037 and a density of 549.78 persons per km². The total area was 45.54 km²....
  
   and the village of Yawara
  Yawara, Ibaraki
  was a village located in Tsukuba District, Ibaraki, Japan.As of 2003, the village had an estimated population of 15,427 and a density of 459.14 persons per km². The total area was 33.60 km²....
  
   (both from Tsukuba District
  Tsukuba District, Ibaraki
  Tsukuba was a district located in Ibaraki, Japan. At its greatest extent it included the areas of today's cities of Jōsō, Shimotsuma, Toride, Tsuchiura, Tsukuba, and Tsukuba Mirai.The district had two towns before the dissolution.* Ina* Yawara...
  
  ) merged to form the new city of Tsukubamirai
  Tsukubamirai, Ibaraki
  is a city located in Ibaraki, Japan. The city was formed on March 27, 2006 from the merger of the town of Ina, and the village of Yawara, both from Tsukuba District....
  
  . Tsukuba District
  Tsukuba District, Ibaraki
  Tsukuba was a district located in Ibaraki, Japan. At its greatest extent it included the areas of today's cities of Jōsō, Shimotsuma, Toride, Tsuchiura, Tsukuba, and Tsukuba Mirai.The district had two towns before the dissolution.* Ina* Yawara...
  
  was dissolved as a result of this merger.