After invading Manchukuo Russian soldiers repeatedly gang raped Japanese girls and nurses, dismissing the complains of Japanese officers. Japanese girls in Manchukuo called Zanryu Fujin were taken as wives by Chinese men.

https://books.google.fr/books?id=eWClDwAAQBAJ&pg=PT99&dq=Every+day+Russian+soldiers+would+come+and+rape+a+group+of+them+%5BJapanese+nurses%5D.+Japanese+officers+made+many+official+complaints+to+the+Soviet+military+headquarters+about+these+incidents+but+to+no+effect.+In+fact,+the+Soviet+forces+responded+to+these+complaints+by+asking+the+Japanese+officers+to+provide+a+number+of+nurses+as+prostitutes,+as+they+believed+this+would+minimize+the+number+of+rapes+by+Soviet+soldiers.&hl=en&newbks=1#v=onepage&q=Every%20day%20Russian%20soldiers%20would%20come%20and%20rape%20a%20group%20of%20them%20%5BJapanese%20nurses%5D.%20Japanese%20officers%20made%20many%20official%20complaints%20to%20the%20Soviet%20military%20headquarters%20about%20these%20incidents%20but%20to%20no%20effect.%20In%20fact%2C%20the%20Soviet%20forces%20responded%20to%20these%20complaints%20by%20asking%20the%20Japanese%20officers%20to%20provide%20a%20number%20of%20nurses%20as%20prostitutes%2C%20as%20they%20believed%20this%20would%20minimize%20the%20number%20of%20rapes%20by%20Soviet%20soldiers.&f=false

American soldiers who landed in Japan and occupied all of the country in 1945 immediately started mass raping Japanese girls and women.

https://books.google.fr/books?id=eWClDwAAQBAJ&pg=PT100#v=onepage&q&f=false

https://uncensoredhistory.blogspot.com/2012/10/rape-abuse-japanese-women-american-soldiers.html

Australian, New Zealand and Indian soldiers under British command also participated in rape of Japanese women in the sectors of Japan they occupied like Hiroshima

https://books.google.fr/books?id=eWClDwAAQBAJ&pg=PT101#v=onepage&q&f=false

This was right after the firebombing of Japan. Entire cities of Japanese civilians were burned to death

https://en.wikipedia.org/wiki/Bombing_of_Tokyo