Ochozu-no-ma

…The west wing is nine bays long from north to south and one bay long from east to west. The first bay on the north side is the “Oyuden-ue” (upper bathhouse), and is a room for ladies who serve the Emperor with hot water in the Oyuden (bathhouse) to the west, separated by a fence. The second bay is the “Ochiyouzu-no-ma” (bathroom for washing hands), followed by the “Asagarei-no-ma” (morning meal room). These are the rooms where the Emperor uses his hand washing and eats. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…西廂は南北9間，東西1間，北寄り第1間は〈御湯殿上〉で，簣の子を隔て西にある御湯殿で御湯を天皇に奉仕する女房の詰所である。第2間は〈御手水間（おちようずのま）〉，ついで〈朝餉間（あさがれいのま）〉と続く。天皇が手水をつかい，食事をする室である。…

※「御手水間」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