Karasu

Karasu is a Turkish toponym meaning “black water,” formed from kara (black) and su (water). The name is used for several places in Turkey and is common in descriptive toponyms across the country.

The best-known Karasu is a town and district of Sakarya Province in the Marmara region, located on the northern coast of the Black Sea. The district includes coastal settlements and inland villages and functions as a regional center for agriculture, fishing, and light industry, with road and rail connections to larger urban areas.

In addition to Karasu in Sakarya, the name appears in other Turkish localities as part of place names that reflect the geographical feature described by the term. The same string also exists outside Turkish geography in different linguistic contexts, notably in Japanese where karasu means crow, written with the kanji 烏 or 鴉.