Okhotsk Subprefecture

Okhotsk Subprefecture

is a subprefecture of Hokkaido, Japan. It was renamed from the earlier Abashiri Subprefecture on April 1, 2010. Abashiri Subprefecture was established in 1897.-Naming:Abashiri Prefecture was named after the subprefectural office in Abashiri...

 (renamed 1 April 2010 from Abashiri Subprefecture)

• On October 1, 2005 - the towns of Ikutahara
  Ikutahara, Hokkaido
  was a town located in Monbetsu District, Okhotsk Subprefecture, Hokkaidoō, Japan.As of 2004, the town had an estimated population of 2,618 and a population density of 9.73 persons per km²...
  
  , Engaru
  Engaru, Hokkaido
  is a town located in Monbetsu District, Okhotsk Subprefecture, Hokkaido, Japan.As of 2008, the town has an estimated population of 23,133 and a population density of 18 persons per km²...
  
  , and Maruseppu
  Maruseppu, Hokkaido
  was a town located in Monbetsu District, Abashiri Subprefecture , Hokkaido, Japan. The town's name comes from a word in the Ainu language which means "a wide area where three rivers gather"....
  
   and the village of Shirataki
  Shirataki, Hokkaido
  was a village located in Monbetsu District, Abashiri Subprefecture , Hokkaido, Japan.As of 2004, the village had an estimated population of 1,305 and a population density of 3.81 persons per km²...
  
   (all from Monbetsu District
  Monbetsu District, Hokkaido
  is a district located in Okhotsk Subprefecture, Hokkaido, Japan.In 1869, Hokkaidō was divided into 11 provinces and 86 districts. Monbetsu was originally placed in Kitami Province....
  
  ) merged to form the new town of Engaru
  Engaru, Hokkaido
  is a town located in Monbetsu District, Okhotsk Subprefecture, Hokkaido, Japan.As of 2008, the town has an estimated population of 23,133 and a population density of 18 persons per km²...
  
  .

• On March 5, 2006 - the city of Kitami
  Kitami, Hokkaido
  is a city located in Okhotsk Subprefecture, Hokkaido, Japan. It is the most populous city and the commercial center in the subprefecture, although the subprefectural capital is Abashiri.Kitami is in central Okhotsk Subprefecture. The Kitami Mountains are nearby....
  
   and the towns of Tanno
  Tanno, Hokkaido
  was a town located in Tokoro District, Abashiri, Hokkaidō, Japan.As of 2005, the town had an estimated population of 5,425 and a density of 33 persons per km². The total area was 163.50 km²...
  
  , Rubeshibe
  Rubeshibe, Hokkaido
  originally was a town located in Tokoro District, Abashiri, Hokkaidō, Japan. Since March 5th, 2006 Rubeshibe, along with the towns of Tanno and Tokoro, all from Tokoro District, were merged into the expanded city of Kitami....
  
  , and Tokoro
  Tokoro, Hokkaido
  was a town located in Tokoro District, Abashiri, Hokkaidō, Japan., the town had an estimated population of 4,885 and a density of 17.55 persons per km². The total area was 278.29 km²....
  
   (all from Tokoro District
  Tokoro District, Hokkaido
  is a district located in Okhotsk Subprefecture, Hokkaido, Japan.As of 2005, the district has an estimated population of 16,291 and a population density of 15 persons per km²...
  
  ) merged to form the new city of Kitami
  Kitami, Hokkaido
  is a city located in Okhotsk Subprefecture, Hokkaido, Japan. It is the most populous city and the commercial center in the subprefecture, although the subprefectural capital is Abashiri.Kitami is in central Okhotsk Subprefecture. The Kitami Mountains are nearby....
  
  .

• On March 31, 2006 - the town of Memanbetsu
  Memanbetsu, Hokkaido
  was a town located in Abashiri District, Hokkaidō, Japan.As of 2004, the town had an estimated population of 5,925 and a population density of 37.26 persons per km²...
  
   and the village of Higashimokoto
  Higashimokoto, Hokkaido
  was a village located in Abashiri District, Abashiri, Hokkaidō, Japan. It was split off from Abashiri Town in 1947.As of 2004, the village has an estimated population of 2,745 and a density of 14.89 persons per km²...
  
   from Abashiri District
  Abashiri District, Hokkaido
  is a district located in Okhotsk Subprefecture, Hokkaido, Japan.As of 2004, the district has an estimated population of 38,013 and a population density of 25.37 persons per km²...
  
   merged to form the new town of Ōzora
  Ozora, Hokkaido
  is a town in Abashiri District, Okhotsk Subprefecture, Hokkaido, Japan.Ōzora was formed on March 31, 2006 as a result of the merger of the town of Memanbetsu, and the village of Higashimokoto, both from Abashiri District....
  
  .

• On October 5, 2009 - the town of Kamiyūbetsu
  Kamiyubetsu, Hokkaido
  was a town located in Monbetsu District, Okhotsk Subprefecture, Hokkaido, Japan.As of 2007, the town has an estimated population of 5,695 and a population density of 36.3 persons per km². The total area is 161.39 km²....
  
   merged into the town of Yūbetsu
  Yubetsu, Hokkaido
  is a town located in Monbetsu District, Okhotsk Subprefecture, Hokkaido, Japan.As of 2008, the town has an estimated population of 4,950 and a population density of 14.52 persons per km². The total area is 344.35 km²....
  
  ; both are in Monbetsu District, Hokkaidō
  Monbetsu District, Hokkaido
  is a district located in Okhotsk Subprefecture, Hokkaido, Japan.In 1869, Hokkaidō was divided into 11 provinces and 86 districts. Monbetsu was originally placed in Kitami Province....
  
  .

Hidaka Subprefecture

Hidaka Subprefecture

is a subprefecture of Hokkaidō, Japan. The west side of the Hidaka mountains occupies most of the area. Hidaka is sparsely populated and has many of Hokkaidō's natural resources...

• On March 1, 2006 - the towns of Monbetsu
  Monbetsu, Hokkaido (Hidaka)
  was a town located in Saru District, Hidaka, Hokkaidō, Japan.On March 1, 2006 Monbetsu was merged into the expanded town of Hidaka.As of 2004, the town had an estimated population of 12,836 and a density of 29.94 persons per km². The total area was 428.73 km²....
  
   and Hidaka
  Hidaka, Hokkaido
  is a town located in Saru District, Hidaka, Hokkaidō, Japan.-Geography:Hidaka town is divided into two wards, which coincide with the former towns of Hidaka and Monbetsu. Biratori lies between the two wards separating them. Hidaka lies in the Hidaka Mountains at a cross road leading to Sapporo,...
  
   from Saru District
  Saru District, Hokkaido
  is a district located in Hidaka Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 21,190 and a density of 12.21 persons per km²...
  
   merged to form the new town of Hidaka
  Hidaka, Hokkaido
  is a town located in Saru District, Hidaka, Hokkaidō, Japan.-Geography:Hidaka town is divided into two wards, which coincide with the former towns of Hidaka and Monbetsu. Biratori lies between the two wards separating them. Hidaka lies in the Hidaka Mountains at a cross road leading to Sapporo,...
  
  .

• On March 31, 2006 - the towns of Mitsuishi
  Mitsuishi, Hokkaido
  was a town that was located in Mitsuishi District, Hidaka, Hokkaidō, Japan.On March 31, 2006 Mitsuishi was merged with the town of Shizunai, from Shizunai District, to form the new town of Shinhidaka, in the newly-created Hidaka District....
  
   from Mitsuishi District
  Mitsuishi District, Hokkaido
  was a district located in Hidaka Subprefecture, Hokkaidō, Japan.In 2004, the district had an estimated population of 4,950 and a density of 14.30 persons per km². The total area was 346.23 km²....
  
   and Shizunai
  Shizunai, Hokkaido
  was a town that was located in Shizunai District, Hidaka, Hokkaidō, Japan.On March 31, 2006 Shizunai was merged with the town of Mitsuishi, from Mitsuishi District, to form the new town of Shinhidaka, in the newly-created Hidaka District....
  
   from Shizunai District
  Shizunai District, Hokkaido
  was a district located in Hidaka Subprefecture, Hokkaidō, Japan.In 2004, the district had an estimated population of 22,581 and a density of 28.17 persons per km². The total area was 801.51 km²....
  
   merged to form the new town of Shinhidaka
  Shinhidaka, Hokkaido
  is a town located in Hidaka District, Hidaka Subprefecture, Hokkaidō, Japan. Shinhidaka is the most populous town and the economic center of Hidaka Subprefecture.-History:...
  
  (in the newly-created Hidaka District
  Hidaka District, Hokkaido
  is a district located in Hidaka Subprefecture, Hokkaidō, Japan.As of October 31, 2006, the district has an estimated population of 27,150 and a density of 23.7 persons per km². The total area is 1,147.74 km².- Towns and villages :*Shinhidaka...
  
  ). Mitsuishi District
  Mitsuishi District, Hokkaido
  was a district located in Hidaka Subprefecture, Hokkaidō, Japan.In 2004, the district had an estimated population of 4,950 and a density of 14.30 persons per km². The total area was 346.23 km²....
  
   and Shizunai District
  Shizunai District, Hokkaido
  was a district located in Hidaka Subprefecture, Hokkaidō, Japan.In 2004, the district had an estimated population of 22,581 and a density of 28.17 persons per km². The total area was 801.51 km²....
  
   were both dissolved with this merger.

Hiyama Subprefecture

Hiyama Subprefecture

is a subprefecture of Hokkaidō, Japan located on the Oshima Peninsula on the Sea of Japan side. It includes Okushiri Island. It was established in 1897.-Towns and villages by district:* Hiyama District** Assabu** Esashi ** Kaminokuni* Kudō District...

• On September 1, 2005 - the town of Taisei
  Taisei, Hokkaido
  was a town located in Kudō District, Hiyama, Hokkaidō, Japan.On September 1, 2005 Taisei, along with the town of Kitahiyama, from Setana District, was merged into the expanded town of Setana, formerly from Setana District and now in Kudō District....
  
   from Kudō District
  Kudo District, Hokkaido
  is a district located in Hiyama Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 2,458 and a density of 18.36 persons per km². The total area is 133.91 km².-Towns and villages:...
  
   and the towns of Setana
  Setana, Hokkaido
  is a town located in Kudō District, Hiyama, Hokkaidō, Japan.As of December 2008, the town has an estimated population of 10,190 and a density of 15.96 persons per km²...
  
   and Kitahiyama
  Kitahiyama, Hokkaido
  was a town located in Setana District, Hiyama, Hokkaidō, Japan.On September 1, 2005 Kitahiyama, along with the town of Taisei, from Kudō District, was merged into the expanded town of Setana, formerly from Setana District and now in Kudō District....
  
   from Setana District
  Setana District, Hokkaido
  is a district located in Hiyama Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 15,173 and a density of 14.14 persons per km². The total area is 1,072.86 km².-Towns and villages:*Imakane...
  
   merged to form the town of Setana
  Setana, Hokkaido
  is a town located in Kudō District, Hiyama, Hokkaidō, Japan.As of December 2008, the town has an estimated population of 10,190 and a density of 15.96 persons per km²...
  
  (now in Kudō District
  Kudo District, Hokkaido
  is a district located in Hiyama Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 2,458 and a density of 18.36 persons per km². The total area is 133.91 km².-Towns and villages:...
  
  ).

• On October 1, 2005 - the town of Kumaishi
  Kumaishi, Hokkaido
  was a town located in Nishi District, Oshima, Hokkaidō, Japan.The town's name literally means bear rock after a prominent rock formation that looks like a bear and cub on its coast....
  
   from Nishi District
  Nishi District, Hokkaido
  is a district located in Hiyama Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 8,357 and a density of 21.82 persons per km²...
  
   in Hiyama Subprefecture merged with the town of Yakumo
  Yakumo, Hokkaido
  is a town located in Futami District, Oshima, Hokkaidō, Japan.As of 2008, the town has an estimated population of 19,543 and a density of 23.08 persons per km². The total area is 955.98 km²....
  
   from Yamakoshi District
  Yamakoshi District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 7,424 and a density of 23.89 persons per km²...
  
   in Oshima Subprefecture
  Oshima Subprefecture
  is a subprefecture of Hokkaidō, Japan. As of 2004 it had a population of 456,621 and an area of 3,715.38 km².Hakodate Airport is located in the City of Hakodate.- Geography :-Towns and villages by district:* Futami District** Yakumo* Kameda District...
  
   to form the new town of Yakumo
  Yakumo, Hokkaido
  is a town located in Futami District, Oshima, Hokkaidō, Japan.As of 2008, the town has an estimated population of 19,543 and a density of 23.08 persons per km². The total area is 955.98 km²....
  
  (in the newly-created Futami District
  Futami District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 16,975 and a density of 23.08 persons per km²...
  
  ). The former town of Kumaishi moved to Oshima Subprefecture
  Oshima Subprefecture
  is a subprefecture of Hokkaidō, Japan. As of 2004 it had a population of 456,621 and an area of 3,715.38 km².Hakodate Airport is located in the City of Hakodate.- Geography :-Towns and villages by district:* Futami District** Yakumo* Kameda District...
  
   at the same time.

Iburi Subprefecture

Iburi Subprefecture

is a subprefecture of Hokkaidō, Japan.- Geography :Located in south-central Hokkaido, Iburi stretches East-West and North-South. Iburi covers an area of . Iburi borders Oshima subprefecture to the West, Shiribeshi, Ishikari, and Sorachi subprefectures to the North, and Hidaka subprefecture to the...

• On March 1, 2006 - the village of Ōtaki
  Otaki, Hokkaido
  was a village located in Usu District, Iburi, Hokkaidō, Japan.On March 1, 2006 Ōtaki was merged into the city of Date.As of 2004, the village had an estimated population of 2,054 and a density of 7.50 persons per km². The total area was 274.03 km²....
  
   from Usu District
  Usu District, Hokkaido
  is a district located in Iburi Subprefecture, Hokkaidō. As of March, 2008, the district has an estimated Population of 3,009 and a Density of 14.7 persons/km². The total area is 205.04 km².The district has only one town.*Sōbetsu-Timeline:...
  
   merged into the city of Date
  Date, Hokkaido
  is a city located in Iburi, Hokkaidō, Japan.Date was established around 1869 and became a city on April 1, 1972.Date lies at the conjunction of National Highway Route 37 and Route 453....
  
  .

• On March 27, 2006 - the towns of Hayakita
  Hayakita, Hokkaido
  was a town located in Yūfutsu District, Iburi, Hokkaidō, Japan.On March 27, 2006 Hayakita was merged with the town of Oiwake, also from Yufutsu District, to form the new town of Abira....
  
   and Oiwake
  Oiwake, Hokkaido
  was a town located in Yūfutsu District, Iburi, Hokkaidō, Japan.On March 27, 2006 Oiwake was merged with the town of Hayakita, also from Yufutsu District, to form the new town of Abira....
  
   from Yūfutsu (Iburi) District
  Yufutsu District, Hokkaido
  is a district divided between Iburi and Kamikawa Subprefectures.-Towns and villages:*Iburi**Abira **Atsuma**Mukawa*Kamikawa**Shimukappu-History:...
  
   merged to form the new town of Abira
  Abira, Hokkaido
  is a town in Yufutsu District, Iburi Subprefecture, Hokkaidō, Japan.Abira was founded on March 27, 2006 by the merger of the towns of Hayakita and Oiwake, both from Yufutsu District....
  
  .

• On March 27, 2006 - the towns of Hobetsu
  Hobetsu, Hokkaido
  was a town located in Yūfutsu District, Iburi, Hokkaidō, Japan.On March 27, 2006 Hobetsu was merged into the expanded town of Mukawa ....
  
   and Mukawa
  Mukawa, Hokkaido
  is a town located in Yūfutsu District, Iburi, Hokkaidō, Japan.On March 27, 2006 the towns of Hobetsu and Mukawa , both from Yūfutsu District merged to create new town of Mukawa...
  
   from Yūfutsu (Iburi) District
  Yufutsu District, Hokkaido
  is a district divided between Iburi and Kamikawa Subprefectures.-Towns and villages:*Iburi**Abira **Atsuma**Mukawa*Kamikawa**Shimukappu-History:...
  
   merged to form the new town of Mukawa
  Mukawa, Hokkaido
  is a town located in Yūfutsu District, Iburi, Hokkaidō, Japan.On March 27, 2006 the towns of Hobetsu and Mukawa , both from Yūfutsu District merged to create new town of Mukawa...
  
  , now with a different writing.

• On March 27, 2006 - the towns of Abuta
  Abuta, Hokkaido
  was a town located in Abuta District, Iburi, Hokkaidō, Japan.On March 27, 2006 Abuta was merged with the town of Tōya, also from Abuta District, to form the town of Tōyako....
  
   and Tōya
  Toya, Hokkaido
  was a village located in Abuta District, Iburi, Hokkaidō, Japan.On March 27, 2006 Tōya was merged with the town of Abuta, also from Abuta District, to form the town of Tōyako....
  
   from Abuta (Iburi) District
  Abuta District, Hokkaido
  is a district located in Iburi and Shiribeshi Subprefectures in Hokkaidō, Japan.As of 2004, the district has an estimated population of 31,526 and a density of 28.30 persons per km²...
  
   merged to form the new town of Tōyako
  Toyako, Hokkaido
  is a town in Abuta District, Iburi Subprefecture, Hokkaidō, Japan. This town was formed on 23 March 2006 through the merger of the town Abuta and the village of Tōya...
  
  .

Ishikari Subprefecture

Ishikari Subprefecture

is a subprefecture of Hokkaidō prefecture, Japan, located in the western part of the island. Its population in 2003 was 2,279,943.There are 6 cities, three towns, and one village under its jurisdiction. The subprefectural capital is Sapporo, also the capital of Hokkaidō prefecture...

• On October 1, 2005 - the villages of Atsuta
  Atsuta, Hokkaido
  Atsuta was a village located in Atsuta District, Ishikari, Hokkaidō, Japan. The village was situated on the West coast of Hokkaidō on Route 231 between Ishikari City and Hamamasu....
  
   from Atsuta District
  Atsuta District, Hokkaido
  was a district located in Ishikari Subprefecture, Hokkaidō, Japan.As of 2004, the district had an estimated population of 2,592 and a density of 8.85 persons per km². The total area was 292.84 km².-Mergers:...
  
   and Hamamasu
  Hamamasu, Hokkaido
  Hamamasu was a village located in Hamamasu District, Ishikari Subprefecture, Hokkaidō, Japan.As of 2004, the village had an estimated population of 2,179 and a density of 7.00 persons per km². The total area was 311.16 km²....
  
   from Hamamasu District
  Hamamasu District, Hokkaido
  Hamamasu was a district of Ishikari Subprefecture, Hokkaidō, Japan.In 2004 the district had an estimated population of 2,179 and a density of 7.00 persons per km². The total area was 311.16 km².-Merger:...
  
   merged into the city of Ishikari
  Ishikari, Hokkaido
  is a city located in Ishikari Subprefecture, Hokkaidō, Japan.The city was born out of Ishikari Town on September 1, 1996.On October 1, 2005, the village of Atsuta, from Atsuta District, and the village of Hamamasu, from Hamamasu District, merged into Ishikari.As of March 1, 2008, the city has an...
  
  , thereby dissolving both districts.

Kamikawa Subprefecture

Kamikawa Subprefecture

is a subprefecture of Hokkaidō, Japan. The name is derived from Kamikawa no hitobito no Shūraku , a translation of the Ainu Peni Unguri Kotan. Settlement began in 1867...

• On September 1, 2005 - the town of Asahi
  Asahi, Hokkaido
  was a town located in Kamikawa District, Kamikawa, Hokkaidō, Japan.On September 1, 2005 Asahi was merged into the city of Shibetsu.As of 2004, the town had an estimated population of 1,799 and a density of 3.45 persons per km². The total area was 522.01 km²....
  
   from Kamikawa (Teshio) District
  Kamikawa (Teshio) District, Hokkaido
  is a district located in Kamikawa Subprefecture, Hokkaidō, Japan. Confusingly, there is a district of the same name, Kamikawa District, in the same subprefecture. When Hokkaidō was divided into provinces and districts, this district was placed under Teshio Province...
  
   merged with the city of Shibetsu
  Shibetsu, Hokkaido
  is a city located in Kamikawa Subprefecture, Hokkaidō, Japan.As of 2008, the city has an estimated population of 22,859 and the density of 20.4 persons per km²...
  
   to form the new city of Shibetsu
  Shibetsu, Hokkaido
  is a city located in Kamikawa Subprefecture, Hokkaidō, Japan.As of 2008, the city has an estimated population of 22,859 and the density of 20.4 persons per km²...
  
  .

• On March 27, 2006 - the town of Fūren
  Furen, Hokkaido
  was a town located in Kamikawa District, Kamikawa, Hokkaidō, Japan.On March 27, 2006 Fūren was merged into the city of Nayoro.As of 2004, the town had an estimated population of 5,194 and a density of 23.54 persons per km². The total area was 220.61 km²....
  
   from Kamikawa (Teshio) District
  Kamikawa (Teshio) District, Hokkaido
  is a district located in Kamikawa Subprefecture, Hokkaidō, Japan. Confusingly, there is a district of the same name, Kamikawa District, in the same subprefecture. When Hokkaidō was divided into provinces and districts, this district was placed under Teshio Province...
  
   merged with the city of Nayoro
  Nayoro, Hokkaido
  - External links :...
  
   to form the new city of Nayoro
  Nayoro, Hokkaido
  - External links :...
  
  .

Kushiro Subprefecture

Kushiro Subprefecture

is a subprefecture of Hokkaidō, Japan.-Towns and villages by district:* Akan District** Tsurui* Akkeshi District** Akkeshi** Hamanaka* Kawakami District** Shibecha** Teshikaga* Kushiro District** Kushiro* Shiranuka District** Shiranuka- History :...

• On October 11, 2005 - the towns of Akan
  Akan, Hokkaido
  was a town located in Akan District, Kushiro Subprefecture, Hokkaidō.As of September 30, 2004 it had an estimated population of 6,518 and an area of 739.25 km²...
  
   and Onbetsu
  Onbetsu, Hokkaido
  was a town located in Shiranuka District, Kushiro Subprefecture, Hokkaidō. As of September 30, 2004 it had an estimated population of 2,821 and an area of 401.40 km²....
  
   merged with the city of Kushiro
  Kushiro, Hokkaido
  is a city located in Kushiro Subprefecture, Hokkaidō, Japan. It is the capital city of Kushiro Subprefecture, as well as the most populous city in eastern Hokkaidō....
  
   to form the new city of Kushiro
  Kushiro, Hokkaido
  is a city located in Kushiro Subprefecture, Hokkaidō, Japan. It is the capital city of Kushiro Subprefecture, as well as the most populous city in eastern Hokkaidō....
  
  .

Nemuro Subprefecture

Nemuro Subprefecture

is a subprefecture of Hokkaidō, Japan. The Japanese claim the disputed Southern Kurile Islands as part of this subprefecture....

• There were not any mergers occurred during the 2000s in this subprefecture.

Oshima Subprefecture

Oshima Subprefecture

is a subprefecture of Hokkaidō, Japan. As of 2004 it had a population of 456,621 and an area of 3,715.38 km².Hakodate Airport is located in the City of Hakodate.- Geography :-Towns and villages by district:* Futami District** Yakumo* Kameda District...

• On December 1, 2004 - the town of Minamikayabe from Kayabe District
  Kayabe District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 24,463 and a density of 51.09 persons per km². The total area is 478.82 km².-Mergers:...
  
   and the towns of Esan and Toi and the village of Todohokke from Kameda District
  Kameda District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 39,166 and a density of 111.43 persons per km²...
  
   merged into the city of Hakodate
  Hakodate, Hokkaido
  is a city and port located in Oshima Subprefecture, Hokkaido, Japan. It is the capital city of Oshima Subprefecture.Hakodate was Japan's first city whose port was opened to foreign trade in 1854 as a result of Convention of Kanagawa, and used to be the most important port in northern Japan...
  
  .

• On April 1, 2005 - the towns of Sawara
  Sawara, Hokkaido
  was a town located in Kayabe District, Oshima, Hokkaidō, Japan.On April 1, 2005 Sawara was merged into the expanded town of Mori and no longer exists as an independent municipality....
  
   and Mori
  Mori, Hokkaido
  is a town located in Kayabe District, Oshima, Hokkaidō, Japan. The total area of the town is .-Demographics:On March 31, 2009 the town had a population of 18,433 and a population density of 50.1 persons per km²....
  
   from Kayabe District
  Kayabe District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 24,463 and a density of 51.09 persons per km². The total area is 478.82 km².-Mergers:...
  
   merged to form the new town of Mori
  Mori, Hokkaido
  is a town located in Kayabe District, Oshima, Hokkaidō, Japan. The total area of the town is .-Demographics:On March 31, 2009 the town had a population of 18,433 and a population density of 50.1 persons per km²....
  
  .

• On October 1, 2005 - the town of Yakumo
  Yakumo, Hokkaido
  is a town located in Futami District, Oshima, Hokkaidō, Japan.As of 2008, the town has an estimated population of 19,543 and a density of 23.08 persons per km². The total area is 955.98 km²....
  
   from Yamakoshi District
  Yamakoshi District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 7,424 and a density of 23.89 persons per km²...
  
   in Oshima Subprefecture merged with the town of Kumaishi
  Kumaishi, Hokkaido
  was a town located in Nishi District, Oshima, Hokkaidō, Japan.The town's name literally means bear rock after a prominent rock formation that looks like a bear and cub on its coast....
  
   from Nishi District
  Nishi District, Hokkaido
  is a district located in Hiyama Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 8,357 and a density of 21.82 persons per km²...
  
   in Hiyama Subprefecture
  Hiyama Subprefecture
  is a subprefecture of Hokkaidō, Japan located on the Oshima Peninsula on the Sea of Japan side. It includes Okushiri Island. It was established in 1897.-Towns and villages by district:* Hiyama District** Assabu** Esashi ** Kaminokuni* Kudō District...
  
   to form the new town of Yakumo
  Yakumo, Hokkaido
  is a town located in Futami District, Oshima, Hokkaidō, Japan.As of 2008, the town has an estimated population of 19,543 and a density of 23.08 persons per km². The total area is 955.98 km²....
  
  (in the newly-created Futami District
  Futami District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 16,975 and a density of 23.08 persons per km²...
  
  ). The former town of Kumaishi joined Oshima Subprefecture at the same time.

• On February 1, 2006 - the towns of Kamiiso
  Kamiiso, Hokkaido
  was a town located in Kamiiso District, Oshima, Hokkaidō, Japan.As of 2004, the town had an estimated population of 36,887 and a density of 140.57 persons per km². The total area was 262.41 km²....
  
   from Kamiiso District
  Kamiiso District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 48,470 and a density of 71.18 persons per km². The total area is 680.95 km².-Merger:...
  
   and Ōno
  Ono, Hokkaido
  was a town located in Kameda District, Oshima, Hokkaidō, Japan.As of 2004, the town had an estimated population of 10,826 and a density of 80.26 persons per km². The total area was 134.88 km²....
  
   from Kameda District
  Kameda District, Hokkaido
  is a district located in Oshima Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 39,166 and a density of 111.43 persons per km²...
  
   merged to form the new city of Hokuto
  Hokuto, Hokkaido
  is a city in the center of the Oshima Subprefecture in Japan's northern island of Hokkaidō.It was formed on February 1, 2006 from merging the town of Kamiiso, from Kamiiso District, and the town of Ōno, from Kameda District....
  
  .

Rumoi Subprefecture

Rumoi Subprefecture

is a subprefecture of Hokkaidō, Japan. As of 2004, it had a population of 63,406 and an area of 4,019.97km².-Towns and villages by district:* Mashike District** Mashike* Rumoi District** Obira* Teshio District** Enbetsu** Horonobe** Teshio...

• There were not any mergers occurred during the 2000s in this subprefecture.

Shiribeshi Subprefecture

Shiribeshi Subprefecture

is a subprefecture of Hokkaidō, Japan. The subprefecture's capital is Kutchan. As of July 31, 2004, the estimated population was 256,184 and the area was 4,305.65 km².- Towns and villages by district :* Abuta District** Kimobetsu...

• There were not any mergers occurred during the 2000s in this subprefecture.

Sorachi Subprefecture

Sorachi Subprefecture

is a subprefecture of Hokkaidō, Japan. As of 2004, its estimated population is 373,736 and its area is 6,558.26 km².-Cities:* Akabira* Ashibetsu* Bibai* Fukagawa* Iwamizawa * Mikasa* Sunagawa* Takikawa* Utashinai* Yūbari...

• On March 27, 2006 - the town of Kurisawa
  Kurisawa, Hokkaido
  was a town located in Sorachi District, Sorachi Subprefecture, Hokkaidō, Japan.On March 27, 2006 Kurisawa, along with the village of Kita, also from Sorachi District, was merged into the expanded city of Iwamizawa....
  
   and the village of Kita
  Kita, Hokkaido
  is a village located in Sorachi District, Sorachi, Hokkaidō, Japan.On March 27, 2006 Kita, along with the town of Kurisawa, also from Sorachi District, was merged into the expanded city of Iwamizawa....
  
   (both from Sorachi District
  Sorachi District, Hokkaido
  is a district divided between Sorachi and Kamikawa Subprefectures, Hokkaidō. As of 2004, the district has an estimated population of 53,011 and an area of 1,497.21 km², giving a population density of 35.41 persons per square kilometer.-Towns and Villages:...
  
  ) merged into the city of Iwamizawa
  Iwamizawa, Hokkaido
  is a city located in Sorachi Subprefecture, Hokkaidō, Japan.On March 27, 2006 the town of Kurisawa, and the village of Kita, both from Sorachi District, Sorachi Subprefecture, have merged into Iwamizawa....
  
  .

Sōya Subprefecture

Soya Subprefecture

is a subprefecture of Hokkaidō, Japan. Its population is estimated to be 77,500 as of July 31, 2004 and its area is 4,050.84 km². It is the northernmost subprefecture of Japan.Wakkanai Airport is located in Wakkanai...

• On March 20, 2006 - the towns of Utanobori
  Utanobori, Hokkaido
  was a town located in Esashi District, Sōya, Hokkaidō, Japan.On March 20, 2006 Utanobori was merged into the town of Esashi.As of 2004, the town had an estimated population of 2,332 and a density of 3.84 persons per km². The total area was 606.51 km²....
  
   and Esashi
  Esashi, Hokkaido (Soya)
  is a town in Esashi District, Sōya Subprefecture, Hokkaidō, Japan. As of 2007, its estimated population is 9,641 and its area is 1115.67 km². The name comes from the Ainu word Esaushi, meaning "cape" - History :...
  
   from Esashi District
  Esashi District, Hokkaido
  is a district located in Sōya Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 16,986 and a density of 8.87 persons per km². The total area is 1,915.76 km².-Towns and villages:*Esashi*Hamatonbetsu*Nakatonbetsu...
  
   merged to form the new town of Esashi
  Esashi, Hokkaido (Soya)
  is a town in Esashi District, Sōya Subprefecture, Hokkaidō, Japan. As of 2007, its estimated population is 9,641 and its area is 1115.67 km². The name comes from the Ainu word Esaushi, meaning "cape" - History :...
  
  .

Tokachi Subprefecture

Tokachi Subprefecture

is a subprefecture of Hokkaidō, Japan corresponding to the old province of Tokachi. As of 2004 its estimated population is 360,802 and its area is 10,830.99 km².Tokachi-Obihiro Airport is in the city of Obihiro.- Geography :-Towns and villages by district:...

• On February 6, 2006 - the village of Chūrui
  Churui, Hokkaido
  was a village located in Hiroo District, Tokachi Subprefecture, Hokkaidō, Japan.As of 2004, the village had an estimated population of 1,802 and a density of 13.10 persons per km². The total area was 137.54 km²....
  
   from Hiroo District
  Hiroo District, Hokkaido
  is a district located in Tokachi Subprefecture, Hokkaidō, Japan.As of 2004, the district has an estimated population of 16,735 and a density of 10.80 persons per km²...
  
   merged into the town of Makubetsu
  Makubetsu, Hokkaido
  is a town located in Nakagawa District, Tokachi, Hokkaidō, Japan.On February 6, 2006 the village of Chūrui, from Hiroo District, was merged into Makubetsu....
  
  in Nakagawa (Tokachi) District
  Nakagawa (Tokachi) District, Hokkaido
  is a district located in Tokachi Subprefecture, Hokkaidō, Japan. There is a district with the same name in Kamikawa Subprefecture, see Nakagawa District, Hokkaidō....
  
  .