Psycho geographical view of tending power

Engagement in war is the historical tradition in Japan before US occupation. Imperial Japan was believed in a theme, more military power, the more wealth. Before, US occupation Japan had a strong Military power.
This tendency growing up in human mind is related with the some geographical context.
When any country foundation is based on agriculture then for more productivity there required more land. For the need of more production there required conquiring land. That leads to occupying.
In Japan, from the period of Shogun, a lot of samurai class warrior people are found to establish for protecting land from occupation and occupying other land. Because, Before rapid industrialisation Japan was complete agricultural country but not having suffient land for production due to having a lot of hills all over japan.