2 wrongs don't make 1 right.
>> No one can deny, Asians and Arabs robbed other nations of their prosperity.
Scale vastly differs. You should be checking how much Europe extracted out of Asia/Africa before bringing Japan into the discussion.
I bet most Europeans are not taught about Europeans atrocities committed in Africa/Asia at school. That's why you are not able to even perceive scale of exploitation correctly. Europeans killed 4 million people deliberately engineering famine in South Asia. Pretty, sure they've removed these things out of their textbooks but feel free to do your own research. These things are less than 100 years old.
Yes, Japan/Europe are both rich today so are those Arab nations too.
What about the countries who they robbed?