Translation guide
A G-string is a minimal underwear or swimwear style. In Japanese, it is usually referred to by borrowed terms or descriptive phrases.
Refer to the skimpy garment that has a thin strip of fabric at the back.
The most direct loanword from English, widely understood in fashion and retail contexts.
彼女はGストリングをはいている。
She is wearing a G-string.
Literally 'T-back', a common Japanese term for thong or G-string style underwear. Slightly broader than G-string but often used interchangeably.
水着はTバックが流行っている。
T-back swimsuits are in fashion.
Slang for 'string panties', referring to very skimpy underwear. Casual and somewhat vulgar.
紐パンは見えちゃダメだよ。
Your string panties shouldn't be visible.