Whether it was before the outbreak of World War II, during the war or after World War II, Miyamoto Yuriko, always adhering to the struggle against the unjust war started by Japanese fascist militarism, through the novel, comments, diaries and other carriers, expressed the hatred for war militarism government, the sympathy for the suffered people due to the war and a strong complaints against the war causing humanity devastation. Different with the other Japanese writers who indulged in that war bringing about harm to the Japanese people, Miyamoto Yuriko clearly recognized the role of the Japanese as invaders during World War II, and associated herself with the democracy movement and the women’s liberation movement. Even after the end of World War II, Miyamoto Yuriko still spared no effort to expose the evil nature of the Japanese militarists that had launched the war, and sounded the alarm against the recurrence of preventive wars.