also: ひとすみ
noun
Often used in the phrase 一隅を照らす (to shine a light in one corner, i.e., to do one's part quietly). Can refer to a physical corner or a small, secluded place.
彼は部屋の一隅で静かに本を読んでいた。
He was quietly reading a book in a corner of the room.
「一
I like the phrase 'to shine a light in one corner.'