Relatives of a Sri Lankan woman who died while in custody at an immigration center in central Japan last year sued the government on Friday, demanding ¥156 million ($1.35 million) in damages.

The family of Ratnayake Liyanage Wishma Sandamali alleges she was illegally detained and died due to a lack of necessary medical care. The suit was filed with the Nagoya District Court two days before the first anniversary of her death.

Wishma died at the age of 33 on March 6 last year at the Nagoya Regional Immigration Services Bureau after a month of medical complaints, including vomiting and stomach aches.