Yukiko Okamoto, also known as Sachiko Okamoto, (Japanese: 岡本幸子;[1] born 29 November 1974) is a retired Japanese runner who specialized in the half marathon and marathon.
At the 1990 World Cross Country Championships she finished eighteenth in the junior race,[2] and won a silver medal in the team competition.
At the 1995 World Cross Country Championships she finished fifteenth in the senior race and ended fourth in the team competition.
She also won a bronze medal at the 1996 World Road Relay Championships.
[2] These two championships ended with a fifth place and silver medal, respectively, in team competition.