Ōishi Kuraudo is a character in the Higurashi no Naku Koro ni series. He is an old detective who works for the Okinomiya Police Station. For the past five years, he has been trying to prove that the Sonozaki family is behind the strange incidents that occur about the same time as the Watanagashi Festival, and has become increasingly persistent as his retirement draws close. He usually appears not long after the first murder occurs in a given arc, where he will ask driving questions to main character of the arc. The questions and his theories often fuel their building paranoia.