Yoko Yamamoto was born on March 17, 1942 in the Nakano ward of Tokyo, Japan. After graduating from Kokugakuin High School, she started working for Nomura Shoken . Yamamoto's career took off when she started to star in TV dramas such as "Shirobanba", "Shichinin no mago", "Shiroi Kage" and "Shiroi Kassouro". The TV program she stars in usually had high ratings, and she was in demand throughout the '70s, '80s, and '90s. In 1980, she started to branch out into stage acting, and has been active to this day.
