実じっ行こう犯はん

noun

perpetrator

Refers to the person who actually carries out a crime or illegal act, as opposed to an accomplice or mastermind.

• 警けい察さつは実じっ行こう犯はんを逮たい捕ほしたが、首しゅ謀ぼう者しゃはまだ逃にげている。

  The police arrested the perpetrator, but the ringleader is still at large.

• 彼かれは計けい画かくには加くわわっていなかったが、実じっ行こう犯はんとして有ゆう罪ざいになった。

  He wasn't involved in the planning, but was convicted as the perpetrator.