Tokyo University's forensic medicine professor said Tuesday at a hearing for Aum guru Shoko Asahara that the death of a Tokyo sarin attack victim is linked to a consciousness disturbance caused by an organic phosphorus substance.

Sarin gas is an organic phosphorus substance.

Takehiko Takatori, who conducted a postmortem examination of Mitsuo Okada after he died from the March 1995 nerve gassing of Tokyo's subway system, testified that the autopsy shows a strong link between Okada's death and such a substance. Okada died three months after the subway gas attack, which killed 11 people and injured thousands. He was 51.