Even if General Matsumi was executed because of the behavior of his men, most of the actual criminals were lived years and years after the massacre, with the consciousness of killing thousands.
One of the most surprising consequences of the events that happened in nanking was the response of the Japanese government, they planned an underground system for military prostitution, they thought that it will end the raping of local women.
The number of survivals was very low, but those who survived faced different problems trough they lives, they suffered of shame and and isolation for a lifetime.