While passions have settled somewhat since Japan's surrender in World War II, tempers continue to flare on occasion over the widespread perception that the Japanese government has made insufficient penance for their past atrocities, or has sought to whitewash the history of these events. Today, though the Japanese government has effected some compensatory measures, anti-Japanese sentiment continues based on historical and nationalist animosities linked to Imperial Japanese military aggression and atrocities. Japan's delay in clearing more than 700,000 (according to the Japanese Government) pieces of life-threatening and environment contaminating chemical weapons buried in China at the end of World War II is another cause of anti-Japanese sentiment.