Aum Shinrikyo founder Shoko Asahara has refused to speak throughout much of his seven-year trial on charges related to the deadly 1995 sarin gas attack on Tokyo's subway system, so it came as little surprise when he remained tight-lipped at Thursday's session at the Tokyo District Court.

Nevertheless, the court, prosecutors and his defense agreed to hold another two question sessions before the prosecution demands punishment.

Asahara's lawyers and presiding Judge Shoji Ogawa have encouraged him to speak of his role in the various cases, but the 48-year-old defendant has responded only with gestures, at times violently, as though trying to communicate in sign language.