noun
red herring
A misleading clue or distraction, used in the same figurative sense as in English. Common in mystery and debate contexts.
その証拠は単なるレッドヘリングだった。
That evidence was just a red herring.
議論の中でレッドヘリングを持ち出すのはよくない。
It's not good to bring up a red herring in a discussion.