The Japanese actress who offered to mate with Oliver the chimp for scientific research was Kumiko Yamaguchi. This unusual proposal was made in the late 1970s when Oliver, a chimpanzee known for his human-like features, became the subject of interest for researchers studying the origins of human traits. As for what happened to her, Kumiko Yamaguchi's offer received significant media attention, but it did not lead to any actual mating or research project. Over the years, she continued her career in the entertainment industry in Japan, although specific details about her later life and career are less documented.
