Omotekimon

...In Onmyodo, this refers to the northeast corner, which is considered the most evil direction. This is the front demon gate, and its opposite, the southwest corner, is also frowned upon as the back demon gate. Even today, carpenters are particularly averse to building in this direction, and it is said that it is bad luck to build a toilet, entrance, bathroom, etc. in the direction of the demon gate within a house. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…陰陽道（おんみようどう）でもっとも悪いとされる丑寅（うしとら）(艮)すなわち北東の隅をいう。これを表鬼門とし，また，その正反対の未申（ひつじさる）(坤)すなわち南西方も裏鬼門として忌み嫌った。ことに大工はいまでもこの方角への建築を忌み，とくに屋敷内の鬼門に当たる方角に便所，玄関，風呂場などを造るのはよくないなどという。…

※「表鬼門」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