Short answers, pulled from the story.
Kuusankoski is nicknamed the "Paper capital of Finland" because it is primarily known for paper manufacturing and is home to three large factory complexes. The paper industry traces back to factories established in the 1870s and 1890s, powered by the rapids of the river Kymijoki.
Kuusankoski was founded as a municipality in 1921, formed from parts of the neighbouring territories of Iitti and Valkeala. It gained the status of kauppala (a place of commerce) in 1957 and became a town in 1973. In 2009 it merged with five other municipalities to form the new, consolidated city of Kouvola.
UPM-Kymmene Oyj operates three hydropower plants in the area: the Kuusankoski plant and the Voikkaa plant, each at 30 megawatts, and the Keltti plant at 17 megawatts. All three were registered in Finland's Guarantee of Origin system in 2014.
Kuusankoski is the hometown of footballer Sami Hyypia, born in 1973. Former Nightwish singer Tarja Turunen has also lived there. Other notable figures include composer Kaj Chydenius (1939-2024) and Eeva-Kaarina Volanen (1921-1999).
In 2009, Kuusankoski merged with five other municipalities, including Kouvola, Elimaki, Anjalankoski, Valkeala, and Jaala, to form a new consolidated Kouvola with a population exceeding 80,000, making it the tenth largest city in Finland. Kuusankoski became a neighbourhood within the new city.
The Kuusankoski Speedway track is a motorcycle speedway circuit located on the southern outskirts of the neighbourhood, off the Kuusaantie road. It hosted the final of the Finnish Individual Speedway Championship in 2007.