Comfort women were women and girls forced into sexual slavery by the Imperial Japanese Armed Forces in occupied countries and territories before and during World War II. The term "comfort women" is a translation of the Japanese ianfu (慰安婦), which literally means "comforting, consoling woman". During World War II, Japanese troops forced hundreds of thousands of women from Australia, Burma, China, the Netherlands, the Philippines, Japan, Korea, Indonesia, and other countries into sexual enslavement for Japanese troops; however, the majority of the women were from Korea. Many women died or committed suicide due to brutal mistreatment and sustained physical and emotional distress. After the war, Japan's acknowledgment of the comfort women's plight was minimal, lacking a full apology and appropriate restitution, which damaged Japan's reputation in Asia for decades. Only in the 1990s did the Japanese government begin to officially apologize and offer compensation.

The Nanjing Massacre or the Rape of Nanjing was the mass murder of Chinese civilians in Nanjing, the capital of the Republic of China, immediately after the Battle of Nanking and the retreat of the National Revolutionary Army in the Second Sino-Japanese War, by the Imperial Japanese Army. Beginning on December 13, 1937, the massacre lasted six weeks. The perpetrators also committed other war crimes such as mass rape, looting, torture, and arson. The massacre is considered to be one of the worst wartime atrocities.