Kenji Doihara  As a leading intelligence officer, he played a key role to the Japanese machinations that led to the occupation of large parts of China, the destabilization of the country, and the disintegration of the traditional structure of Chinese society to diminish reaction to the Japanese plans by using highly-unconventional methods. He became the mastermind of the Manchurian drug trade and the real boss and sponsor behind every kind of gang and underworld activity in China. After the end of World War II, he was prosecuted for war crimes in the International Military Tribunal for the Far East. He was found guilty, sentenced to death, and hanged in December 1948. Kenji Doihara was born in Okayama City, Okayama Prefecture. He attended military preparatory schools as a youth, and graduated from the 16th class of the Imperial Japanese Army Academy in 1904. He was assigned to various infantry regiments as a junior officer, and returned to school to graduate from the 24th class of the Army Staff College in 1912. Doihara longed for a high-ranking military career, but his family's low social status stood in the way. He therefore contrived to use his 15-year-old sister as a concubine for a prince, who in exchange, rewarded him with a military rank and a posting to the Japanese embassy in Beijing, China as assistant to the military attaché General Hideki Tōjō. After that Doihara worked more easily his way up the military ladder by taking a number of regular army posts necessary as to earn promotions. He spent most of his early career in various postings in northern China, except for a brief tour in 1921-1922 as part of the Japanese forces in eastern Russia during the Siberian Intervention. He was attached to IJA 2nd Infantry Regiment from 1926 to 1927 and IJA 3rd Infantry Regiment in 1927. In 1927, he was part of an official tour to China and then attached to IJA 1st Division from 1927 to 1928. He learned to speak fluent Mandarin Chinese, and other Chinese dialects and with this he managed to take a position to the military intelligence. From that post in 1928, it was he who masterminded the assassination of Zhang Zuolin, the Chinese warlord who controlled Manchuria on his way from Beijing to Shenyang ordering to blown up of his train at Shenyang. After that he was made military adviser to the Kuomintang Government until 1929. In 1930, he was promoted to colonel and commanded IJA 30th Infantry Regiment.