Guo Xicui, a Chinese woman who filed a lawsuit against the Japanese government seeking reparations for wartime sexual slavery, has died, a source who knew her said. She was 86.

Guo died Tuesday of an unknown cause at her home in Yu County, Shanxi province, the source said Thursday.

Guo, who sued Japan asking for an apology and compensation, told the court she was abducted by Japanese soldiers in Shanxi in 1942, confined to military facilities and sexually assaulted daily for a long period of time.

In April 2007, the Supreme Court in Japan acknowledged Guo had been subjected to violence but ruled that Chinese individuals have no judicial right to demand war reparations from Japan due to the terms of a 1972 bilateral agreement.