Ah, so this is the reason Japs killed 20 million chinese. They needed oil. Presumably it's also the reason they vivisected prisoners. They needed oil. American airmen were vivisected at a Japanese medical school. This latter event proves that even Japan's finest, such as their med students and doctors, were sick in the head.
China’s oil is in the northwest. What was Manchuria. Yup, that’s why they went there.