ルックス (rukkusu) Japanese meaning: looks | KotomoraHe's popular because he has good looks.
You shouldn't judge people solely by their looks.
Usage patterns
ルックスがいいto be good-looking
He's good-looking, so he also works as a model.
ルックスで〈動詞〉to judge/choose based on looks
She doesn't judge people by their looks.
ルックスに自信があるto be confident about one's looks
He seems confident about his looks.