Imperial Japan
During World War II, Imperial Japan conquered large parts of Asia and the surrounding Pacific Islands. During that time, the Japanese army was responsible for the death of millions of civilians and prisoners of war. They experimented on, tortured, starved, and enslaved many of the people they conquered. Estimates range from 3 to 14 million people in total.
I'm not sure where or how, izismile gets his facts... well, not facts really, leftist propaganda more like it. As in, Confederates raping "millions" of African-American women and, too, the items you mention as well as many others. Columbus a 'conquistador'... seriously.
Post entertainment, entertaining pictures, etc., not skewed takes on history in support of a Howard Zinn view of the world.