Aira, Kagoshima Prefecture, Kyūshū Region, Japan

Geography | Neighboring municipalities | History | Government | Economy | Education | Transport : Rail : Road | Local attractions

🇯🇵 Aira (姶良市, Aira-shi) is a city located in Kagoshima Prefecture, Japan. It is located west of Kirishima and north of Kagoshima. As of 29 February 2024, the city had an estimated population density of 340 persons per km². The total area of the city is 231.25 km² (89.29 sq mi).


Geography Aira extends approximately 25 km from north-to-south and approximately 24 km from east-to-west in central Kagoshima Prefecture. Part of the south-east side faces Kagoshima Bay. In the area facing Kagoshima Bay, four rivers flow from the west: the Oshikawa River, the Beppu River, the Amikake River, and the Hikiyama River.The alluvial plains of these rivers come together to form the Aira Plain, which contains the main urban area. Natural beaches remain on the coast leading to Kagoshima City on the west side and the coast near the border with Kirishima City on the east side, but the rest is an artificial coast formed by reclaimed land. The northern part of Aira City is lined with mountains belonging to the Kitasatsu Volcanic Group, and the border with Satsumasendai City on the north-west side almost forms the watershed with the Sendai River basin. A tributary of the Beppu River flows between these mountains, and several villages have developed along it. On the other hand, between Kirishima City and Kirishima City on the north-east side, there is a continuous plateau called Jusanzukahara, and tributaries of the Amikake River and Hikiyama River flow into it from the Kirishima City side.

The border with Kagoshima City on the south-west side is the Muregaoka Mountain Range, which has an altitude of around 500 meters, and drops sharply into the plains of Aira City and the coastline. On the north side of the Muregaoka Mountain Range, the Omoi River flows from the Kagoshima City side, and the relatively low-elevation land connects to the centre of the former Yoshida Town, which merged with Kagoshima City.

A volcano that once existed in the northern part of Kagoshima Bay caused an eruption called the Great Aira Eruption about 25,000 years ago, forming the Aira Caldera. Aira City is located on the north-west side of this caldera, on the somma, and there is a stratum called Shirasu, which originated from pyroclastic flows that flowed out during a large eruption. Other topographical features within the city that originate from volcanic activity include Yonemaru and Sumiyoshi Pond, both of which are said to be marls.

Approximately 65% of Aira's area is forested. The central plains are well-developed paddy fields, and the area on the plateau bordering Kirishima City on the north-east is an upland farming area.


Neighboring municipalities Kagoshima Prefecture • Kagoshima • Satsumasendai • Kirishima • Satsuma.


History The area of Aira was part of ancient Ōsumi Province, and there is evidence of continuous habitation since the Japanese Paleolithic period. The area was a stronghold of the Hayato people, many of whom had migrated to this location after being forced out of their territories in central Kyushu, and was one of the sites of the Hayato Rebellion of 720. In the Heian period, the area came under the control of the Okura clan, who claimed descent from Emperor Ling of Han, whose descendants fled to Japan. The region was contested in the Nanboku-chō period, gradually coming under control of the Shimazu clan in the 15th century. During the Edo Period the area was under the control of Kagoshima Domain. After the Meiji restoration, the villages of Chōsa, Kajiki, Kamō, Mizobe, Shigetomi and Yamada were established in Aira District on May 1, 1889 with the creation of the modern municipalities system. Kajiki gained town status on June 1, 1912 followed by Kamō on November 1, 1928. Kajiki was bombed twice in World War II, killing 43 people, including 14 students from the former Kajiki Junior High School (currently Kagoshima Prefectural Kajiki High School). The town of Aira was established on January 1, 1955 by the merger of the town of Chōsa and village of Shigetomi. Aira, Kajiki, and Kamō merged to form the city of Aira on March 23, 2010.


Government Aira has a mayor-council form of government with a directly elected mayor and a unicameral city council of 24 members. Aira contributes two members to the Kagoshima Prefectural Assembly. In terms of national politics, the city is part of the Kagoshima 3rd district of the lower house of the Diet of Japan.


Economy Aira has a mixed economy centering on agriculture, fishing, forestry and light manufacturing and food processing.


Education Aira has 19 public elementary schools and five public junior high schools operated by the city government and four public high schools operated by the Kagoshima Prefectural Board of Education. There is also one private elementary school.


Transport: Rail JR Kyushu - Nippō Main Line

■ Kajiki - Kinkō - Chōsa - Aira - Shigetomi - Ryūgamizu


Transport: Road • Kyushu Expressway • Higashikyushu Expressway • National Route 10


Local attractions • Ryūmon-daki, one of Japan's 100 Waterfalls.

Tokyo Time 
Tokyo Time
Image: Adobe Stock Phattana #70928059

Aira has a population of over 77,948 people. Aira also forms one of the centres of the wider Kagoshima Prefecture which has a population of over 1,599,779 people.

To set up a UBI Lab for Aira see: Twitter:

Twin Towns - Sister Cities Aira has links with:

🇯🇵 Hioki, Japan
Text Atribution: Wikipedia Text under CC-BY-SA license

East of: 130.617

🇯🇵 Uki 130.679

🇯🇵 Iizuka 130.683

🇯🇵 Yamaga 130.689

🇯🇵 Kumamoto 130.7

🇯🇵 Kumamoto City 130.712

🇯🇵 Kōshi 130.78

🇦🇺 Darwin 130.841

🇯🇵 Kanoya 130.847

🇯🇵 Kitakyushu 130.875

🇯🇵 Hita 130.933

West of: 130.617

🇯🇵 Yatsushiro 130.6

🇯🇵 Yame 130.564

🇯🇵 Tamana 130.56

🇯🇵 Kagoshima 130.55

🇯🇵 Dazaifu 130.517

🇯🇵 Kurume 130.517

🇯🇵 Tosu 130.515

🇯🇵 Ōmuta 130.45

🇯🇵 Arao 130.437

🇯🇵 Higashi 130.417

Antipodal to Aira is: -49.383,-31.717

Locations Near: Aira 130.617,31.7167

🇯🇵 Kagoshima 130.55,31.6 d: 14.4  

🇯🇵 Hioki 130.367,31.6 d: 27  

🇯🇵 Satsumasendai 130.299,31.808 d: 31.7  

🇯🇵 Kanoya 130.847,31.382 d: 43.2  

🇯🇵 Izumi 130.36,32.073 d: 46.5  

🇯🇵 Kobayashi 130.971,31.987 d: 45  

🇯🇵 Miyakonojō 131.079,31.809 d: 44.9  

🇯🇵 Yatsushiro 130.6,32.5 d: 87.1  

🇯🇵 Nichinan 131.392,31.588 d: 74.7  

🇯🇵 Miyazaki 131.421,31.912 d: 79  

Antipodal to: Aira -49.383,-31.717

🇧🇷 Viamão -51.023,-30.088 d: 19775.8  

🇧🇷 Gravataí -50.983,-29.933 d: 19764.7  

🇧🇷 Alvorada -51.079,-30.001 d: 19764.9  

🇧🇷 Cachoeirinha -51.083,-29.95 d: 19760.2  

🇧🇷 Porto Alegre -51.229,-30.028 d: 19757.6  

🇧🇷 Canoas -51.183,-29.915 d: 19751.2  

🇧🇷 Sapucaia do Sul -51.146,-29.842 d: 19747.1  

🇧🇷 São Leopoldo -51.149,-29.772 d: 19740.8  

🇧🇷 Campo Bom -51.05,-29.667 d: 19736.9  

🇧🇷 Novo Hamburgo -51.128,-29.683 d: 19734.1  

Bing Map

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