After becoming paralyzed from the waist down at the age of 16 following a car accident, Ohama was approached a Calgary Grizzlies player in a store who convinced her to play the sport. She was eventually invited to tryout for the Canada women's national wheelchair basketball team in 1989. Ohama made her senior debut at the 1992 Summer Paralympics, where Team Canada won gold. She also won gold at the 1996 and 2000 Paralympic Games and bronze at the 2004 Summer Paralympics. Ohama was later named to Team Canada's roster for the 2008 Osaka Cup in Japan.