The Working Group on Transparency of Police Investigation, a group of organizations which works to prevent wrongful convictions as a result of reprehensible investigations, held a conference with representative Shuji Ikeguchi, Nobuo Masao, and Mister of Justice Toshio Ogawa on May 30th. The group suggested that the government to ensure fully transparent police investigation and access to evidential materials, and abolish substitute prison system immediately. This discussion was also attended by human rights organizations including Amnesty International Japan and Center for Prisoners' Rights. The Group also turned in the petition signed by 6,933 people to Mr. Ogawa.