Her first album, 1975's Good Bye, was inspired by a friend's death.
All of her subsequent albums, such as Mother Sky and The Last Waltz, also explored tragic or morbid themes.
Throughout her performing career, Morita was a secretive and reclusive performer who always wore round sunglasses and grew her curly hair long to hide her identity.
This led to a revival of interest in her work and the release of a greatest hits album.
Morita died of heart failure eight years later on April 24, 2018, at the age of 65.