Ōmura (大村市, Ōmura-shi) is a city located in Nagasaki Prefecture, Japan. As of August 1, 2023, the city has an estimated population of 96,508^[1] and a population density of 750 persons per km². Its total area is 126.33 km², and it includes Nagasaki Airport.

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Ōmura 大村市
City
Ōmura City Hall
Flag Emblem
Location of Ōmura in Nagasaki Prefecture
Ōmura Location in Japan
Coordinates: 32°54′0″N 129°57′30″E
Country	Japan
Region	Kyushu
Prefecture	Nagasaki Prefecture
Government
• Mayor	Hiroshi Sonoda [ja]
Area
• Total	126.34 km2 (48.78 sq mi)
Population  (August 1, 2023)
• Total	96,508
• Density	760/km2 (2,000/sq mi)
Time zone	UTC+09:00 (JST)
City hall address	1-25 Kushima, Omura-shi, Nagasaki-ken 856-8686
Climate	Cfa
Website	www.city.omura.nagasaki.jp
Symbols
Flower	Omura sakura
Tree	Quercus gilva

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Ōmura is a castle town, and was the capital of Ōmura Domain, ruled by the local Ōmura clan for over 900 years in pre-Meiji Japan. It was the site of considerable foreign trade and missionary activity during the late Muromachi period, and the Catholic saint Marina de Omura hails from this city. Due to its proximity to the trading settlement at Dejima in Nagasaki, was one of the first areas of Japan to re-open to foreign contact after the end of the national seclusion policy after the Meiji Restoration. In the opera Madama Butterfly, set in nearby Nagasaki, the place name Omara in the line "ed alla damigella Butterfly del quartiere d'Omara Nagasaki" probably refers to Ōmura. From 1868-1945, Ōmura was host to numerous military facilities as part of the Sasebo Naval District, most notably that of a major air base for the Imperial Japanese Navy Air Service. The former naval base was the location of the squalid^[2] Ōmura Migrant Detention Center, where mainly Korean refugees—termed "stowaways" (mikkōsha synonymous with "smuggler")—were held until deportation, frequently for several years. Since August 1996 the nearby Ōmura Immigration Reception Center in a modern building serves the same function.^[3]

The modern city was founded in 1942 after a town and several villages were municipalized by the prefecture.^[4] The city was largely destroyed by American bombing in 1944. After the war, Omura hosted Japan's first motorboat racing event in 1952. Additionally in 1975, the city opened the world's first island airport; Nagasaki Airport which is located offshore in Ōmura Bay. The airport was constructed by reclaiming land on Minoshima Island after the island's residents agreed to relocate to replace the former airport which is now used by the Japan Maritime Self-Defense Force.^[4][5]

Per Japanese census data, the population of Ōmura in 2022 is 98,237 people.^[8] Ōmura has been conducting censuses since 1960. Although the city's population declined slightly in the 1960s, Ōmura's population has been growing since 1970.

Ōmura has a mixed economy, with the manufacture of refractory bricks as a major industry. Dairy and poultry farming, as well as cultured pearls are also of importance. However, due to its proximity to the larger urban centers of Nagasaki and Sasebo, Ōmura also serves as bedroom community for both cities.^{[citation needed]}

Oriental Air Bridge, a regional airline, is headquartered in the city.^[9] At one time J-Air had its headquarters at the airport.^[10]

Ōmura hosted the official 2011 FIBA Asia Championship for Women.^[11]

• Sintra, Portugal^[12]
• San Carlos, California, USA^[12]
• Semboku, Akita, Japan^[12]
• Itami, Hyōgo, Japan^[12]

• Hantaro Nagaoka, Meiji-era physicist
• Anza Ohyama, singer and stage actress
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