|Anime||Episode 1 School's Seven Mysteries Murder Case|
Ryuuta Saki is Hajime's and Miyuki's kouhai (junior) in Fudo High School. He is also a member of its Mysteries Research Club, and accompanies Hajime in many murder cases.
Debut-1997 series Episode 1, School's Seven Mysteries Murder Case.
Saki wears glasses, and is always seen carrying his camcorder recording everything he sees. Though this peculiar habit of his makes him seem unusual, it has helped Hajime solve many mysteries.