This is all having a very familiar ring to it.
I grew up in the middle of the San Joaquin valley, which also had a large Japanese population and many of my schoolmates were descendant's of those who were once in the internment camps. (To this day it infuriates me to think that the man who came up with that brilliant idea went on to become Chief Justice of the Supreme Court



)
My father recalls the fact that one day he showed up for school and all of his Japanese classmates were just gone. Those interred, rather than looking for someone to be angry at hungered for something productive to do while they were there. The garden farms they had worked in the valley were replaced by small plots they chiseled out of the miserable dirt at the camps. Those who were of age sought military service out of a sense of patriotism in spite of the injustice done to them, and the desire to restore honor to their families which had been dishonored by the misguided powers that be. Growing up where I did I can honestly say that if you wanted to hear of the grave injustice done to them you had to ask a white man. Those who were interred never gave in to bitterness, but rather went about the business of hard work and a productive life.
That is the culture from which our "culture of Koi" descends. Small wonder we get so much more from it than "pretty fish".