[3] She attended North Sydney Girls High School,[4] and went on to study communications and theatre media at Charles Sturt University in Bathurst, New South Wales.
[7] Oyama directed, co-wrote, and co-starred in The Angus Project, a web series and television pilot that aired on ABC iview in 2018.
Based on real events in Bathurst,[8] the series co-stars Angus Thompson as a sports journalist with cerebral palsy, for whom Oyama becomes a friend and caregiver.
[14] Also in that year, Oyama received media attention for making "#CatPoop" a trending topic on Twitter in Australia.
[15] On 9 July 2024, Deadloch was renewed for a second season and it was announced that Oyama would reprise the role of Abby Matsuda.