Translation

反社会的な / 迷惑な / 社会規範に反する

Meaning

Antisocial most often means harmful, hostile, or disruptive toward other people or society. It is used for behavior such as vandalism, harassment, violence, or serious rule-breaking. Do not confuse it with asocial, which simply means not very social.

Examples

• 夜中の破壊行為は反社会的行動として扱われました。
  The late-night vandalism was treated as antisocial behavior.
• 近所の人たちは迷惑行為について市に苦情を出しました。
  Neighbors complained to the city about antisocial conduct.