Blood Oath, known in some countries as Prisoners of the Sun, is a 1990 Australian drama film directed by Stephen Wallace and co-written by Denis Whitburn and Brian A. Williams.

At the end of the Second World War on Ambon Island, Australian troops liberate a prisoner-of-war camp and are told by the survivors that their Japanese captors had engaged in systemic beatings, torture, and executions.

Meanwhile, the Australians issue a warrant for the Japanese admiral in charge of the region, Vice-Admiral Baron Takahashi, who is then brought to the island to stand trial.

Seeing his case failing, Captain Cooper then learns about a secret court martial in which Takahashi summarily ordered the deaths of four Australian aircrew members who had been on a reconnaissance flight.

Captain Cooper, not willing to give up his case, beats a confession out of Ikeuchi who admits that the court martial of the airmen had taken place and names a signals officer, Lieutenant Tanaka, as one of the participants.

Tanaka takes the stand and admits the court martial happened, and that Takahashi had ordered the deaths of both the airmen and the prisoners killed at the mass grave.