Their ancient name was "Samurai"; during WWII Japanese or Nipponese.
There is a Nipponese term which fits that description - "zaibatsu".
The Japanese Empire - Japanese Militarism. The Far East had been an important trading area for the European powers for centuries and a developing resentment against what ...
Nips (short for Nipponese), or Japs were the primary terms. I'm sure other terms that were derogatory were used, and these varied from place to place.
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The name sharoy come from Israel.