The answer is: on the battlefield
In the past, shogun is the title given to the man who take control of Japanese government using strong military power. The shoguns rule with absolute authority without any separation of powers within their government structure.
It is very common for a shogun to enter a battlefield, even though the shogun most likely be placed far away from the front line. The reason why shogun enter a battlefield despite his high status is to provide boost in morality for the soldiers.