Telegraph: Japanese massacre of British PoWs was 'covered up'
A total of 548 British and Dutch PoWs were machine-gunned when the Suez Maru, the Japanese "Hell Ship" transporting them, was sunk by an American torpedo attack in the Flores Sea off Indonesia in November 1943. According to a statement made by the Japanese ship's commander, attempts were made by a minesweeper to rescue the PoWs, but they could not be reached in time. However, six years later a crew member admitted the truth, and was backed up by the ship's purser. It has emerged that the then-Secretary of State for War, Manny Shinwell, was informed, and despite the perpetrators being in custody, the decision was taken not to prosecute them, according to a BBC investigation. By that point, while more than 700 Japanese soldiers had been found guilty of war crimes, the Cold War was under way and Japan was needed as an ally against the Soviet Union...Alexander Knoops, a lawyer at the International Criminal Court at the Hague, believes the victims' families were denied justice and might have a good case on which to sue the Government...more...
There's a written account here. There's also a recent BBC radio programme on the incident here but there may be territorial restrictions on listening to it.