[2] Ishizu first started archery as a college student at Yamaguchi University,[3][2] with four-hour training sessions twice a week.
[3] She went on to become an elementary school teacher, continuing archery training early in the morning and late at night.
[4] In 1984, Ishizu competed at the Summer Olympic Games in Los Angeles in the women's individual event and finished fourth with 2524 points scored,[5] after initially tying for second place in the first round.
[6] It was the first fourth-place finish for Japan in Olympic women's archery.
[2] Ishizu won a bronze medal at the 1986 Asian Games in the team event.