A California-based lawyer on Friday urged the Japanese government and Japanese companies to disclose wartime documents that would expose facts about the forced labor of American prisoners of war in Japan during World War II.

Barry Fisher, who is consulting on lawsuits filed recently in California by former U.S. POWs against Japanese companies, charged that Tokyo and Washington are reluctant to release documents on war-related issues, whereas the German government recently disclosed papers that revealed over 500 firms were involved in the Holocaust.

Fisher, who represents most lawsuits by Jewish Holocaust victims against private companies and banks in Europe, said he expects more lawsuits to be filed against Japanese companies.