The japanese state is trying to create a military that can compete with the best armies in the world. To do this it needs an indigenous, long standing warrior ethos and tradition of its own. It will need values like courage, benev ence, politeness, selflessness, sincerity,. honor, loyalty, self control and a strong sense of justice. But there's much more grounded, understandable reasons why japanese soldiers might be reluctant to surrender or flee.
The Asia-Pacific War of 1937-1945 has deep roots. It also involves a Japanese society that's been called one of the most distinctive on Earth. If there were a Japanese version of Captain America, this would be his origin story.