Note: This is his family's background, not his own...or maybe it is, you will just have to see ;)
Basically I wanted to explore with this main character the dynamics of shame and the effects of a crisis of faith as well as radical groups and their member's children.
Here is a link to the wikipedia page that describes the uyoku dantai, the Japanese term for Japan's radical imperial nationalist groups.
I am doing a lot of research so I can correctly capture the Japanese culture and the mindset of these groups and what their effect would be on this character. I try to be as accurate as possible in the portrayal of any culture or background when I write.