Japan was a totally different story. First off, they were with the allies in WW1. Second, they had a dictator that had different opinions on things than the leader in WW1. He looked at Hitler as a role model almost. The Japanese obeyed him either out of loyalty to leadership, or fear.
But I feel the worst for the Chinese, who were treated terribly by Japan until 1945, and then only had 4 years of freedom until Mao Zedong came into power in 1949, the same way Hitler took over Germany. He persecuted his own people, probably worse than Japan did. I actually joke that if China should get reparations from Japan, they show also get reparations from China.