That may have been a bit of a stretch... I'm also pretty sure there was anti-German propaganda. They wouldn't even sell Hamburgers because of the connection with Germany. They were renamed :3
True, we had a special program for the issei and nissei in this country, but the propaganda stretched across the entire "axis of evil."
As for lingering effects, if we hated all things Japan, goodness knows we wouldn't love their cars
or Sony and Sega and Nintendo... You see what I'm getting at?
I think the culture isn't hated. But it's become a nerdy subject, like computers and videogames and stuff.