Osaka Prefecture in the context of "Square kilometre"

Japan is divided into 47 prefectures (都道府県, todōfuken, [todoːɸɯ̥ꜜkeɴ] ), which rank immediately below the national government and form the country's first level of jurisdiction and administrative division. They include 43 prefectures proper (県, ken), two urban prefectures (府, fu: Osaka and Kyoto), one regional prefecture (道, dō: Hokkaidō) and one metropolis (都, to: Tokyo). In 1868, the Meiji Fuhanken sanchisei administration created the first prefectures (urban fu and rural ken) to replace the urban and rural administrators (bugyō, daikan, etc.) in the parts of the country previously controlled directly by the shogunate and a few territories of rebels/shogunate loyalists who had not submitted to the new government such as Aizu/Wakamatsu. In 1871, all remaining feudal domains (han) were also transformed into prefectures, so that prefectures subdivided the whole country. In several waves of territorial consolidation, today's 47 prefectures were formed by the turn of the century. In many instances, these are contiguous with the ancient ritsuryō provinces of Japan.

Each prefecture's chief executive is a directly elected governor (知事, chiji). Ordinances and budgets are enacted by a unicameral assembly (議会, gikai) whose members are elected for four-year terms.

Fu (Chinese: 府; pinyin: fǔ) is a traditional administrative division of Chinese origin used in the East Asian cultural sphere, translated variously as commandery, prefecture, urban prefecture, or city. They were first instituted as a regular form of administrative division of China's Tang Empire, but were later adopted in Vietnam, Japan and Korea. At present, only two fu still remain: the prefectures of Kyoto and Osaka in Japan.

The term fu is currently also used in Chinese to translate the provinces of Thailand, but not those of mainland China, Taiwan or other countries.

Kyoto Prefecture (京都府, Kyōto-fu; Japanese pronunciation: [kʲoꜜː.to, kʲoː.toꜜ.ɸɯ]) is a prefecture of Japan located in the Kansai region of Honshu. Kyoto Prefecture has a population of 2.58 million and has a geographic area of 4,612 square kilometres (1,781 sq mi). Kyoto Prefecture borders Fukui Prefecture to the northeast, Shiga Prefecture to the east, Mie Prefecture to the southeast, Nara Prefecture and Osaka Prefecture to the south, and Hyōgo Prefecture to the west.

Kyoto, the capital and largest city, accommodates 57% of the prefecture's total population, with other major cities including Uji, Kameoka, and Maizuru. Kyoto Prefecture is located on the Sea of Japan coast and extends to the southeast towards the Kii Peninsula, covering territory of the former provinces of Yamashiro, Tamba, and Tango. Kyoto Prefecture is centered on the historic Imperial capital of Kyoto, and is one of Japan's two "prefectures" using the designation fu rather than the standard ken for prefectures. Kyoto has made Kyoto Prefecture one of the most popular tourism destinations in Japan for national and international tourists, and 21% of the prefecture's land area was designated as Natural Parks. Kyoto Prefecture forms part of the Keihanshin metropolitan area, the second-most-populated region in Japan after the Greater Tokyo area and one of the world's most productive regions by GDP.

The Kansai region (関西地方, Kansai Chihō; [kaꜜɰ̃.sai, kaɰ̃.sai tɕiꜜ.hoː] ) a.k.a. the Kinki region (近畿地方, Kinki Chihō; Japanese pronunciation: [kʲiꜜŋ.ki, kʲiŋ.ki̥ tɕiꜜ.hoː]) lies in the southern-central region of Japan's main island Honshū. The region includes the prefectures of Nara, Wakayama, Kyoto, Osaka, Hyōgo and Shiga, often also Mie, sometimes Fukui, Tokushima and Tottori. The metropolitan region of Osaka, Kobe and Kyoto (Keihanshin region) is the second-most populated in Japan after the Greater Tokyo Area.

Nara Prefecture (奈良県, Nara-ken; Japanese pronunciation: [naꜜ.ɾa, na.ɾaꜜ.keɴ]) is a prefecture of Japan located in the Kansai region of Honshu. As of 2020, Nara Prefecture has a population of 1,321,805 and has a geographic area of 3,691 square kilometres (1,425 sq mi). Nara Prefecture borders Kyoto Prefecture to the north, Osaka Prefecture to the northwest, Wakayama Prefecture to the southwest, and Mie Prefecture to the east.

Nara is the capital and largest city of Nara Prefecture, with other major cities including Kashihara, Ikoma, and Yamatokōriyama. Nara Prefecture is located in the center of the Kii Peninsula on Japan's Pacific Ocean coast, and is one of only eight landlocked prefectures. Nara Prefecture has the distinction of having more UNESCO World Heritage listings than any other prefecture in Japan.

Hyōgo Prefecture (兵庫県, Hyōgo-ken; Japanese pronunciation: [çoꜜː.ɡo, -ŋo, çoː.ɡoꜜ.keɴ, -ŋoꜜ.keɴ]) is a prefecture of Japan located in the Kansai region of Honshu. Hyōgo Prefecture has a population of 5,469,762 (as of 1 June 2019) and a geographic area of 8,400 square kilometres (3,200 square miles). Hyōgo Prefecture borders Kyoto Prefecture to the east, Osaka Prefecture to the southeast, and Okayama and Tottori prefectures to the west.

Kobe is the capital and largest city of Hyōgo Prefecture, and the seventh-largest city in Japan, with other major cities including Himeji, Nishinomiya, and Amagasaki. Hyōgo Prefecture's mainland stretches from the Sea of Japan to the Seto Inland Sea, where Awaji Island and a small archipelago of islands belonging to the prefecture are located. Hyōgo Prefecture is a major economic center, transportation hub, and tourist destination in western Japan, with 20% of the prefecture's land area designated as Natural Parks. Hyōgo Prefecture forms part of the Kobe metropolitan area and Osaka metropolitan area, the second-most-populated urban region in Japan after the Greater Tokyo area and one of the world's most productive regions by GDP.

Osaka (Japanese: 大阪市, Hepburn: Ōsaka-shi; pronounced [oː.sa.kaꜜ.ɕi]; commonly just 大阪, Ōsaka [oː.sa.ka] ) is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third-most populous city in Japan, following the special wards of Tokyo and Yokohama. With an estimated population of 2,816,247 as of October 1, 2025 and a population density of about 12,505 people per square kilometer, it is the largest component of the Keihanshin Metropolitan Area, which is the second-largest metropolitan area in Japan and the 10th-largest urban area in the world with more than 19 million inhabitants.

Osaka was traditionally considered Japan's economic hub. By the Kofun period (300–538) it had developed into an important regional port, and in the 7th and 8th centuries, it served briefly as the imperial capital. Osaka continued to flourish during the Edo period (1603–1867) and became known as a center of Japanese culture. Following the Meiji Restoration, Osaka greatly expanded in size and underwent rapid industrialization. The construction boom accelerated population growth throughout the following decades, and by the 1900s, Osaka was the industrial hub in the Meiji and Taishō eras. Osaka made noted contributions to redevelopment, urban planning and zoning standards in the postwar period, and the city developed rapidly as one of the major financial centers in the Keihanshin Metropolitan Area.

Wakayama Prefecture (和歌山県, Wakayama-ken; Japanese pronunciation: [wa.kaꜜ.ja.ma, wa.ka.ja.maꜜ.keɴ]) is a prefecture of Japan located in the Kansai region of Honshu. Wakayama Prefecture has a population of 876,030 (as of 1 February 2025) and a geographic area of 4,724 square kilometres (1,824 sq mi). Wakayama Prefecture borders Osaka Prefecture to the north, and Mie Prefecture and Nara Prefecture to the northeast.

Wakayama is the capital and largest city of Wakayama Prefecture, with other major cities including Tanabe, Hashimoto, and Kinokawa. Wakayama Prefecture is located on the southwestern coast of the Kii Peninsula on the Kii Channel, connecting the Pacific Ocean and Seto Inland Sea, across from Tokushima Prefecture on the island of Shikoku.

Sakai (堺市, Sakai-shi; Japanese pronunciation: [saꜜ.kai, sa.kaꜜi.ɕi]) is a city located in Osaka Prefecture, Japan. It has been one of the largest and most important seaports of Japan since the medieval era. Sakai is known for its kofun, keyhole-shaped burial mounds dating from the fifth century. The kofun in Sakai include the largest grave in the world by area, Daisen Kofun. Once known for swords, Sakai is now famous for the quality of its cutlery. As of 1 January 2022, the city had an estimated population of 819,965, making it the fourteenth most populous city in Japan (excluding Tokyo).