noun which may take the genitive case particle 'no', noun
topless; bare-breasted
Describes a state of being without a top, typically for women; used as a no-adjective or noun.
そのビーチではトップレスが許可されている。
Going topless is allowed on that beach.
彼女はトップレスの写真を撮られた。
She had a topless photo taken.
noun
monokini; topless swimsuit
Specifically refers to a swimsuit that exposes the breasts; a type of monokini.
彼女は大胆なトップレスを着てプールサイドに現れた。
She appeared at the poolside wearing a daring monokini.