河口 かこう Also written 川口, かわぐち Meanings Noun, の-adjective mouth of river; estuary Kanji 河 river. Read as カ. 口 mouth. Read as コウ. Common phrases 河口にある 河口に広がる Words containing 河口 河口港 (かこうこう) port at the mouth of a river Jinuma: Japanese Dictionary · Word lists