one's seat; one's place
Archaic noun for one's seat or place where one sits. Not used in modern Japanese; encountered only in classical texts.
In classical language, 居処 was read いど and referred to the place where one sits.
Archaic noun for the buttocks. Extremely rare; modern Japanese uses 尻 (しり) or 臀部 (でんぶ).
Examples where 居処 means buttocks are limited to old documents.
bottom; buttocks
The historical derivation is uncertain. The kanji 居 (reside) and 処 (place) suggest a place where one sits or stays, but the word is archaic and its origin is not clearly documented.