The Japanese soliders probably never thought so do to their incorrect version of Bushido, the Samurai code. However, I believe that if the Japanese citizens knew about things like the Baton Death March, they would know it was wrong.
Nanking
Conscious
They needed to Modernize.
In turn, have the Japanese EVER said sorry for the BATAAN death march. The rape of Nanking, slave labor of allied prisoners of war ? Best check out Japanese atrocities during WW2 as appose to those of US. You might also check out Japanese atrocities in China and the Philippines during WW2. You might also check the source of your information.
never
The Imperial Japanese committed atrocities and crimes against humanity across Eurasia, the Indian subcontinent and the Pacific region. One of the largest series of crimes included what is now known as the Rape of Nanjing (after the city for which the actions were perpetrated).
They dont realize it's wrong so they do it again
I think when the person realize that he/wrong.
In their history books it never happened. Neither did the Japanese military invasion and atrocities in China leaving millions dead. The negative events from 1933 - 1945 are mostly forgotten and not even taught to the current generation of Japanese students.
Battle of Guadalcanal.
There have been vicious atrocities on both sides of the ages-old conflict between Korea and Japan.
Annulments were designed to address that problem.