Here is a list of mergers inOsaka Prefecture,Japan since the Meiji era.

This list is incomplete. Many changes are missing.

• 1868 (Boshin war/Meiji restoration) – Osaka is established as prefecture(-fu) in succession to the shogunate administration in Osaka (bugyō→saibansho).
• August 1868 (sixth month, Meiji 1) –Sakai (previously shogunate city Sakai and shogunate domain in Izumi province) is established/separated from Osaka as prefecture(-ken).
• 1869 –Kawachi (previously shogunate lands in Kawachi province) is established/separated from Osaka as prefecture(-ken).
• 1869 –Settsu (previously shogunate lands in Settsu province; later renamed →Toyosaki) is established/separated from Osaka as prefecture(-ken).
• 1869 – Toyosaki is split between Osaka andHyōgo.
• 1871/72 (Abolition of domains and first wave of prefectural mergers) – The prefecturesTakatsuki andAsada are merged into Osaka. After consolidation, Osaka covers the Eastern part of Settsu province.

See theList of mergers in Nara Prefecture

• 1869 – Kawachi is merged into Sakai.
• 1870 –Sayama Domain is returned to the central government and merged into Sakai.
• 1870 –Mikami Domain with holdings in Ōmi and Izumi provinces moves the domain seat from Mikami in Ōmi (today:Yasu, Shiga) to Yoshimi in Izumi (today:Tajiri, Osaka) and becomesYoshimi Domain.
• 1871/72 (Abolition of domains and first wave of prefectural mergers) – The prefecturesHakata,Kishiwada, Yoshimi andTannan are merged into Sakai. After consolidation, Sakai encompasses all of Izumi and Kawachi provinces without exclaves/enclaves.
• 1876 –Nara is merged into Sakai.
• 1881 – Sakai is merged into Osaka prefecture.

• 1887 – Nara prefecture is split off from Osaka prefecture.

This list is incomplete. Some mergers are missing.

• 1878–80 (Reactivation of districts as administrative units, establishment of urban districts) – Osaka is subdivided into four urban districts(-ku) and seven [rural] districts(-gun) from ancient Settsu province. Sakai consists of one urban district and four [rural] districts from ancient Izumi province, 16 districts from Kawachi and 15 districts from Yamato (becomes Nara in 1887).
• 1896 – The districtsTeshima andNose are merged to formToyono District.
• 1896 – The districtsŌtori andIzumi (from ancient Izumi Province) are merged to formSenboku-gun ("Izumi North district").
• 1896 – The districtsHine andMinami (from ancient Izumi Province) are merged to formSennan-gun ("Izumi South district").
• 1896 – The districtsIshikawa,Nishigori,Yakami,Furuichi,Asukabe,Tannan andShiki (from ancient Kawachi Province) are merged to formMinami-Kawachi ("South Kawachi") District
• 1896 – The districtsTanboku,Takayasu,Ōgata,Kawachi,Wakae andShibukawa (from ancient Kawachi Province) are merged to formNaka-Kawachi ("Central Kawachi") District.
• 1896 – The districtMatta,Katano andSasara (from ancient Kawachi Province) are merged to formKita-Kawachi ("North Kawachi") District.

This list is incomplete. Most mergers are missing.

After the modern municipalities (cities, towns and villages) were introduced and the Great Meiji mergers performed in 1889 and after the 1896#District mergers, Osaka consisted of:

• 2 [district-independent] cities(-shi)
  • Four urban districts(Higashi-ku, Nishi-ku, Minami-ku, Kita-ku) become part of the newOsaka City(Ōsaka-shi) in 1889.
  • The urban district Sakai(Sakai-ku) becomesSakai City(Sakai-shi) in 1889.
• 9 districts(-gun)
  • Nishinari: 2 towns, 30 villages, district seat:Kami-Fukushima-mura ("Upper Fukushima Village")
  • Higashinari: 4 towns, 26 villages, district seat:Tennōji Village
  • Mishima: 32 villages, district seat:Ibaraki Village
  • Toyono: 1 town, 22 villages, district seat:Ikeda Town
  • Senboku/Izumi North: 40 villages, district seat:Ōtori Village
  • Sennan/Izumi South: 3 towns, 40 villages, district seat:Kishiwada Town
  • Minami-/South Kawachi: 41 villages, district seat:Tondabayashi Village
  • Naka-/Central Kawachi: 40 villages, district seat:Yao Village
  • Kita-/North Kawachi: 2 towns, 31 villages, district seat:Hirakata Town

• 1890 –Sawada Village in Shiki District is merged intoDōmyōji Village.
• 1892 –Naka-Niwa Village andMinami-Niwa Village in Ōtori District merge to formNiwadani Village.

• On February 1, 2005 - The town ofMihara (fromMinamikawachi District) was merged into the expanded city ofSakai. Since then, Sakai has been split into wards of whichMihara-ku is one.

• Ishida Satoshi:System of prefectures(-fu/-ken) and domains(-han) in the Kinki region,Changes in prefectures(-fu/-ken) in the Kinki region,Changes in districts(-ku/-gun) in the Kinki region,Changes in municipalities(-shi/-chō/-son) in Osaka(in Japanese)
• Sakai City, historical sites:Old location of the Sakai Prefectural Government Building (designated prefectural historical landmark of Osaka)(in Japanese)

• Lists of mergers in Japan
• Geography of Osaka Prefecture
• Political history of Osaka Prefecture

• Articles with short description
• Short description is different from Wikidata
• Articles with Japanese-language sources (ja)