na-adjective
antisocial; contrary to public order or morality
Describes behavior, attitudes, or groups that violate social norms, laws, or public morality. Can range from mildly offensive to sociopathic.
See also: 社会 (しゃかい)
彼の反社会的な行動が問題になった。
His antisocial behavior became a problem.
He is suspected of having ties with antisocial forces.