Kabuki actor Ichikawa Ennosuke IV claims to have agreed with his parents that they would die together, investigative sources said Saturday, a day after he was discharged from a hospital.

On Thursday, the popular actor was found collapsed with his parents at their home in Tokyo. Ennosuke's father, Ichikawa Danshiro, 76, was also a kabuki actor. An autopsy has found the parents, who were confirmed dead Thursday, allegedly died from an overdose, the police said.

There were no signs anyone other than the family members were involved in the incident, such as footprints in the house, according to the police, which conducted an on-site investigation Friday. The police plan to question Ennosuke.