Japanese police will make audio and video recordings of the entirety of interrogations in criminal cases subject to lay judge trials on a trial basis starting Oct. 1, according to a new guideline formulated Thursday by the National Police Agency.

Transparency efforts in interrogations by police began in 2008, and the entirety of interrogations were recorded in 1,565 cases, or 48.6 percent, of 3,217 cases subject to lay judge trials in fiscal 2015.

The number of cases subject to audiovisual recordings is limited to about 3 percent of all criminal cases in Japan.