Hiromi "Kumi" Isozaki (Japanese: 磯崎 公美; born 20 March 1965) is a Japanese former track and field athlete who competed in sprinting events from 100 metres to 400 metres. She won four gold medals at the 1982 Asian Games, which she set three games records. She later won 400 m bronze at the 1986 Asian Games and a 200 metres bronze at the 1987 Asian Athletics Championships. She was also a three-time silver medallist in the 4×400 metres relay at continental level.