Prosecutors on Friday demanded an eight-year jail term for a former top bureaucrat at the farm ministry who has admitted to killing his socially reclusive son in Tokyo.

Hideaki Kumazawa, 76, a former vice minister for agriculture, forestry and fisheries, is accused of stabbing his 44-year-old son Eiichiro Kumazawa in the neck and chest multiple times around 3:15 p.m. on June 1, causing his death from massive blood loss.

The defense team sought a suspended term, saying the defendant had supported his eldest son, who had a developmental disorder, for a long time and committed murder to save his own life after his son threatened to kill him.