Yoshiyuki Kono, falsely accused in connection with the June 1994 nerve gas attack in Matsumoto, Nagano Prefecture, said Wednesday at the trial of an Aum Shinrikyo figure that he hopes the proceedings shed light on what really happened.

"I don't know if the defendant was one of the perpetrators, but if he was involved in the case, I want him to tell the facts as they are," said Kono, who took the witness stand for prosecutors in the murder trial of senior Aum figure Tomomitsu Niimi before the Tokyo District Court.

The gas attack in the Matsumoto neighborhood killed seven people and injured hundreds, including Kono, 48, and his wife, Sumiko, who remains in a coma.