Name Kawaguchi Type Settlement Usage Japanese Scripts 川口(Japanese Kanji) かわぐち(Japanese Hiragana) Pronounced Pron. /ka̠.ɰᵝa̠.ɡɯ̟ᵝ.t͡ɕi/ Edit Status Status Meaning & History Means "estuary, mouth of a river" in Japanese, from 川 (kawa), meaning "river", and 口 (kuchi), meaning "mouth-like opening". This is the name of a city in Saitama Prefecture, Japan.