Karasu, Kara-su, Kara su or Qarasu means 'black water' or 'black river' in Turkic languages. In Japanese, karasu means 'raven' or 'crow'. It may refer to:
Rivers
The Balkans A former name of the Struma River (Struma Karasu) in Bulgaria and Thrace, northern Greece A former name of the Mesta/Nestos River (Mesta Karasu) in Bulgaria and northern Greece, forming the border between Greek Macedonia and Thrace A former name of the Haliacmon (İnce Karasu) in western Macedonia, northern Greece Karasu (Istanbul), a river in the greater Istanbul area of Turkey
Central Asia Qarasu River, a small river in northeast Iran feeding into the southeast corner of the Caspian Sea Kara-Suu (Aksy), a right tributary of the river Naryn in Aksy District, Kyrgyzstan Kara-Suu (Kara-Köl), a left tributary of the river Naryn near Kara-Köl, Kyrgyzstan Karasu, name of the last stretch of river Shiderti, Kazakhstan Karasu (Koybagar), a river in Kostanay Region, Kazakhstan Karasu (Karasor), a river in Karaganda Region, Kazakhstan
Japan Karasu River (Gunma) in Gunma Prefecture, Japan
Turkey Karasu (Euphrates), the western of the two major sources of the Euphrates in Eastern Anatolia Karasu (Hatay), a tributary of the Orontes River (formerly of Lake Amik) in Hatay Province, southeastern Turkey, bordering Syria A small river in northwest Anatolia, a tributary of the Sakarya River
Town and villages Azerbaijan Qarasu, Hajigabul Qarasu, Kurdamir Qarasu, Qabala Karasu Kumlakh or Qarasuqumlaq, Agdash Rayon
China Karasu, Xinjiang, a place at the foot of the Kulma Pass Crimea Karasubazar
Japan Karasu, Mie
Kazakhstan Karasu District, Kostanay Region Karasu (village), administrative center of Karasu District Kyrgyzstan several places, see Kara-Suu (disambiguation)
Tajikistan Karasu, Tajikistan, Vahdat District
Turkey Karasu, Sakarya, a town in Sakarya Province Karasu, Karacabey, a village in Bursa Province Karasu, Yenice, a village in Çanakkale Province Karasu, Refahiye, a village in Erzincan Province Karasu, Aşkale, a mahalle in Erzurum Province Karasu, Karayazı, a mahalle in Erzurum Province
Uzbekistan Karasu or Qorasuv, Andijan Province, adjacent to Kara-Suu, Kyrgyzstan
Fictional characters Karasu, a character from the manga and anime series Yu Yu Hakusho Karasu, a Noein character Karasu, a ninja puppet in Naruto Tabito Karasu, a character in Blue Lock
Other uses Karasu, an album in the 13 Japanese Birds series by Merzbow Karasu, or Ravens, or The Solitude of Ravens, a photo book by Masahisa Fukase Karasu Bay, a fictional bay in the air combat video game The Sky Crawlers: Innocent Aces Karasu relief, a rock relief in Turkey, near where the Karasu River, the western branch of the Euphrates, joins the eastern branch of the Euphrates Karasu, a species of giant beaked whale
People with the surname Carasso family, a Sephardic Jewish family of Salonika, often spelled Karasu Emmanuel Carasso (1862–1934), lawyer and politician Isaac Carasso (1874–1939), Emanuel's nephew, founder of Groupe Danone Daniel Carasso, Isaac's son, co-founder of Dannon in the U.S. Albert Karasu, Jewish-Turkish journalist Bilge Karasu (1930–1995), Turkish writer Oğuzhan Karasu (born 1995), Turkish volleyball player