Sink - Onagashi

…Today, it mainly refers to a box-shaped facility made of stainless steel or ceramic for washing dishes and laboratory equipment, but in the past, it broadly referred to any facility or place for washing things. The washing area in the bathroom was also called nagashi, and in some areas the kitchen was called o-nagashi. The simple type of nagashi used in private homes was a water tank carved out of wood buried in a corner of the dirt floor, or surrounded by stones, with running water drawn in by a waterway or water spout, and was often seen in mountain villages. …

*Some of the terminology that refers to "orashi" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…現在は食器や実験器具などを洗うためのステンレスや陶器などで作った箱型の設備をおもに指すが，古くは物を洗う設備や場所を広く指した。風呂場の洗い場も流しと呼ばれ，台所を〈お流し〉と呼ぶ地域もあった。民家で使われた素朴な形式の流しは，土間の一隅に，木をくりぬいた水槽を埋めたり，石で囲んだ水槽を設け，水路や筧（かけい）で流水を引きこむもので，山村に多く見られた。…

※「お流し」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報