Yamaga

Geography

Yamaga is located in the northern inland area of Kumamoto Prefecture, about 30 kilometers north of Kumamoto City. The city borders Fukuoka Prefecture from the north to the northeast, and Oita Prefecture to the east. The area from the urban center, which is slightly south of the geographic center, to the southern part (former Kikuka Town) is a basin. The northern to northeastern part of the city near the prefectural border is part of the Kyushu Mountains. The Kikuchi River flows through the center of the city.

Surrounding municipalities

Fukuoka Prefecture

Yame

Kumamoto Prefecture

Gyokutō

Kikuchi

Kumamoto

Nagomi

Ōita Prefecture

Hita

Climate

Yamaga has a humid subtropical climate (Köppen climate classification Cfa) with hot, humid summers and cool winters. There is significant precipitation throughout the year, especially during June and July. The average annual temperature in Yamaga is 14.9 °C (58.8 °F). The average annual rainfall is 2,177.9 mm (85.74 in) with July as the wettest month. The temperatures are highest on average in August, at around 26.3 °C (79.3 °F), and lowest in January, at around 3.5 °C (38.3 °F). The highest temperature ever recorded in Yamaga was 38.9 °C (102.0 °F) on 3 August 2026; the coldest temperature ever recorded was −10.1 °C (13.8 °F) on 19 February 1977.

Demography

Per Japanese census data, the population of Yamaga is as shown below,

History

The area of Yamaga was part of ancient Higo Province. There are many burial mounds dating from the Kofun period within the city limitsm and the name "Yamaga" appears in early 8th century records. During the Kamakura period, the area developed as a hot spring town and in the Muromachi period it developed into a commercial settlement and a post town on the Buzen Kaido highway, and was noted for its production of umbrellas. During the Edo Period it was part of the holdings of Kumamoto Domain. It was the site of a battle during the 1877 Satsuma rebellion. After the Meiji restoration, the town of Yamaga was established with the creation of the modern municipalities system on April 1, 1889. On January 15, 2005, Yamaga absorbed the towns of Kahoku, Kamoto, Kaō and Kikuka (all from Kamoto District) to create the new and expanded city of Yamaga.

Government

Yamaga has a mayor-council form of government with a directly elected mayor and a unicameral city council of 20 members. Yamaga contributes two members to the Kumamoto Prefectural Assembly. In terms of national politics, the city is part of the Kumamoto 3rd district of the lower house of the Diet of Japan.

Economy

The local economy is based on agriculture and light manufacturing.

Education

Yamaga has 15 public elementary schools and six public junior high schools operated by the city government, and three public high schools operated by the Kumamoto Prefectural Board of Education. There is also one private high school. The prefecture also operates a special education school for the handicapped.

Transportation

Railways

Yamaga has no passenger railway services. The nearest train stations are Shin-Tamana Station on the Kyushu Shinkansen or either Tamana Station or Ueki Station on the JR Kyushu Kagoshima Main Line.

Highways

The Kyushu Expressway passes through the western part of the city, but there are no interchanges within the city

National Route 3

National Route 325

National Route 443

Local attractions

Attractions include the Kumamoto Prefectural Ancient Burial Mound Museum.

Yamaga Bon-dancing Lantern Festival, every August event

Yachioza Traditional Theater

National Historic Sites

Benkei-ga-ana Kofun

Chibusan-Obusan Kofun

Iwabaru Kofun cluster

Katōda Higashibaru Site

Kikuchi Castle ruins

Kumabe Clan Yakata

Nabeta Cave Tombs

Notable people from Yamaga

Mayumi Aoki, swimmer

Ryōtarō Araki, football player

Chiyohakuhō Daiki, sumo wrestler

Shin'ichi Etō, baseball player

Daiki Inaba, professional wrestler

Ikuo Kabashima, politician

Sō Kawahara, football player

Kiyoura Keigo, politician

Raizō Matsuno, politician

Yorihisa Matsuno, politician

Kōhei Miyazaki, football player

Kubushiro Ochimi, suffragist and temperance leader