Yujiro Ishihara
Yamaguchi was a native of Nagoya. She began her career by opening an upscale bar in the Ginza district of Tokyo. Yamaguchi wrote song lyrics during the slow times while managing her bar, leading to a series of successful songs during the 1970s. In 1971, Yamaguchi's song "Yokohama Tasogare" ("Yokohama Twilight Time"), performed by Hiroshi Itsuki, became a major hit within the enka genre. Yamaguchi penned another hit with "Brandy Glass," performed by actor and singer, Yujiro Ishihara. She began writing novels during the 1980s.