What is diplomacy?

A Japanese news photographer was killed in Burma this Friday. He was just taking a video of the monks' and citizens' demonstration which was dispersed by the military. It was reported at first that he was hit by a stray bullet, but the video released through the Internet a few hours later clearly showed what had really happened. He was intentionally shot at close range by a soldier of the military regime. The scene in which he was hit and flew backward into the street was too shocking and terrible. However, the attitude of Japanese government looks too cool and gentle so far. Why don't they get more angry and complain about the cruel murder. Is this the way of Japanese diplomacy? A Japanese Prime Minister said decades ago that a man's life is heavier than the earth and released terrorists and hijackers from jail to North Korea. It was the story decades ago, but the Prime Minister was the father of the present Japanese Prime Minister and the son looks too gentle to the Myanmar's military regime though a life of a Japanese, which should be heavier than the earth, was taken in such a cruel manner. Furthermore, no countries in the world do not act directly to help the Burma people. Can we overlook if a mother and her children ask for a help from a violent father? I am really disappointed at the so called Japanese and international diplomacy.