Debuted as a Mummy in the OVA version of the original Kaiketsu Zorori anime in 1989, Hiyama spent most of his beginner years continued to deliver newspapers, while also continued his performance training whenever he did not receive voice-acting cases to work. He also noted to have part-timed as a security guard for a short while, and mentioned how he deliberately hid his face in case his colleagues spot him out during a period where he has to overlook a construction site near his recording studio.
