Chikugo River

{{Short description|River in Kyūshū, Japan}}

{{More citations needed|date=January 2024}}

{{Infobox river

| name = Chikugo River

| native_name ={{native name|ja|筑後川}}

| image = Chikugo-river Ukiha-Hita.jpg

| image_size = 200px

| image_caption = Chikugo River at Ukiha-Hita

| source1_location = Mount Aso, Kyūshū

| mouth_location = Ariake Sea

| subdivision_type1 = Country

| subdivision_name1 = Japan

| length_km = 143

| source1_elevation =

| mouth_elevation = {{convert|0|m|ft|abbr=on}}

| discharge1_avg = {{convert|94.09|m3/s|cuft/s|abbr=on}}

| basin_size_km2 = 2860

| river_system = Chikugo River

}}

File:Chikugo river up20060426.jpg]]

File:The Famous Scenes of the Sixty States 60 Chikugo.jpg]]

The {{nihongo|Chikugo River|筑後川|Chikugo-gawa}} flows through Kumamoto, Ōita, Fukuoka and Saga prefectures in Japan. With a total length of {{Convert|143|km|mi|0}}, it is the longest river on Kyūshū. It flows from Mount Aso and empties into the Ariake Sea. It is also nicknamed "Tsukushi Jirō". {{coord|33.15|N|130.35|E|display=title}}

The upper reaches of the river are important to forestry, and the middle and lower reaches are important to local agriculture, providing irrigation to some {{Convert|400|km2|mi2|0}} of rice fields on the Tsukushi Plain. The river is also important to industry, with twenty electrical power plants located along its banks, as well as the major city of Kurume in Fukuoka Prefecture. Recognizing the requirement to satisfy divergent needs of various communities along the river, the Japanese Ministry of Land, Infrastructure, Transport and Tourism designated the Chikugo River (along with six other river systems in Japan) as a "Water Resources Development River System" with a comprehensive utilization plan to develop the river's resources.de Graaf, Urban Water in Japan. page 8

The Chikugogawa Onsen Fireworks, held annually on July 28, are the largest fireworks display in Kyūshū. The event has been held since 1650 on the riverbanks at Kurume.