noun
brown sash
General term for a brown sash, not limited to martial arts; can refer to any brown-colored sash or obi.
彼女は着物に茶帯を合わせた。
She paired her kimono with a brown sash.
noun
brown belt
Specifically in martial arts such as judo or karate, the brown belt worn by practitioners of a certain rank.
彼は柔道で茶帯を取った。
He earned his brown belt in judo.