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Kenji Doihara is a famous modern Japanese strategist who led the secret service to engage in aggressive activities in China for more than 20 years. Kenji Doihara's criminal activities were by no means limited to strategic work. He participated in the transition from Emperor Taisho to Emperor Hirohito, and made unremitting efforts to complete Japan's militaristic system; as the core backbone of the Japanese Army's southern movement, he once launched an attack on the powerful northward movement of the Army and achieved complete victory; in the six years after he instigated the rebellion of Wang Jingwei to establish a puppet regime, he also participated in all planning for foreign aggression as an important general of the Army.