Plot: Hiroshi and his friends suspect that Matenro's true identity is Ochiai Sensei, and begin investigating Ochiai's background. However, Ochiai is a completely dull man, and even if I'm mistaken, he doesn't seem to be Matenro
Cast
Megumi UenoYasuko AkagawaMegumi Ueno was 13 in Omoikkiri Detective Team Hardgumi - Season 1 - Mysterious monster mansion (Episode 4).
Birthday: Fri, Jun 15 1973
Taisaku AkinoOchiai-sensei / Kaijin Matenro (voice)Taisaku Akino was 43 in Omoikkiri Detective Team Hardgumi - Season 1 - Mysterious monster mansion (Episode 4).
Birthday: Sun, Feb 14 1943
Toshiyuki AmagasaSusumu AonoToshiyuki Amagasa was 10 in Omoikkiri Detective Team Hardgumi - Season 1 - Mysterious monster mansion (Episode 4).
Birthday: Wed, Aug 25 1976
Yoshimi NakajimaSatoru ShirokinYoshimi Nakajima was >> in Omoikkiri Detective Team Hardgumi - Season 1 - Mysterious monster mansion (Episode 4).
Birthday: Unknown Birthday