The first trial involving lay judges kicked off Monday in the Tokyo District Court with Katsuyoshi Fujii, 72, pleading guilty to murdering his neighbor, Mun Chun Ja, 66, in May.

Before introduction of the lay judge system, which entails six citizens sitting with three professional judges to try serious criminal trials, Japan was the only Group of Eight nation whose public did not participate in criminal trials, according to the Japan Federation of Bar Associations. Japan had a jury system between 1928 and 1943, but only on a limited basis.

Many people remain reluctant to participate in the new system, in which they will have to reach verdicts and hand down sentences, including the death penalty, opinion polls show.