Doji Morita

 was a Japanese singer-songwriter, from Tokyo.
Background.
She was 20 years old when a friend's death inspired her first album. All of her albums keep to tragic or morbid themes.
She ended her career as musician in 1983, after giving a final concert in Tokyo. During her career as a musician she was exceptionally secretive, she wore sunglasses and used her curly hair to hide her face.
In the 1993 TV drama Kou Kou Kyoushi (a.k.a. High School Teacher) as well as in the 2003 TV drama Kou Kou Kyoushi 2003 (a.k.a. High School Teacher 2003), the song "Bokutachi no Shippai" from the second album "Mother Sky" was used as theme song. 
As a result, the greatest hits album "Bokutachi No Shippai" was released.
She married Maeda Ado who used to be her illustrator manager. Maeda Ado died 2010, 8 years before Doji.
Death.
Doji Morita died of heart failure on April 24, 2018 at the age of 65.