The seven-year trial focused on Miyazaki's mental state at the time of the murders. Under Japanese law, people of unsound minds are not subject to punishment, and the feeble-minded are entitled to reduced sentences. Three teams of court-appointed expert psychiatrists came to differing conclusions about Miyazaki's ability to tell right from wrong. Two teams determined him to be feeble-minded—one team concluding that he was schizophrenic, the other that he had multiple personality disorder. A third team found that although Miyazaki had a personality disorder, he was still capable of taking responsibility for his actions.