氏名不詳の方も依頼しましたが名前が分からなければ調査できないと回答されました。
氏名不詳ならば難しいと思います。
自分で調査できれば一番ですが
I also requested a person with an unknown name, but the other party responded that they could not investigate if they did not know the name.
I think it is difficult if the name is unknown.
It would be best if I could do the research myself.