Translation of "Anonymous" in Japanese

And he's asked to remain anonymous.

匿名にするよう 頼まれたからです

When the police received an anonymous report

彼女が自分を傷つけているかもしれないという

I want to remain anonymous in this.

この件では名前を出したくない。

The poem was composed by an anonymous author.

その詩は無名の著者が詠んだ。