No, but some of the older generation are. Most now view internationalisation as essential and are quite welcoming.
The problem is that while most foreigners adapt well to the culture, small groups refused to integrate and complain that things are different or worse to their own country. This jingoistic attitude and refusal to adapt to the way of life is what causes tensions between groups in the society. It isn't racism that is on display, more anger that a minority is refusing to even try and fit in.
basically a large percentage of immigrants who move the the US
I was describing the behaviour of Americans in Japan. They are the group who cause the most problems. Many of the ones I have had to deal with have come across as stuck up, jingoistic and utterly obnoxious. Their superiority complex and lack of social graces is why I have a little respect for US culture, as I now firmly believe American culture preaches a superiority above others, and this is just wrong.
In my time, I've seen; Americans refuse to bow, play music on their iphones on the quiet carriage of the shinkansen and punch a conductor when they complained.
Americans who refuse to bow to anyone sighting "I only bow to Jesus".
Constantly being late and making excuses. Never taking personal responsibility.
One pissed out of our office window located in a high rise building.
One keyed a bosses car.
When I first came to Japan I was a teacher. One idiot stole our school register and started calling teachers and students out for dates. Naturally he was fired.
I had one guy refuse to obey the traffic laws and used to cycle on the wrong side of the road saying crap like "They've gotta learn" and then crashed into a police car. I had to go and apologize on our company's behalf for his behaviour.
One coworker told me about how one American was using the office to have sex with. He had been caught in the action when the manager came in after noticing the light was on at night.
My former boss told me about how one got into a drunken brawl with a policeman. This happens often.
There are but a few of my extensive experiences dealing with Americans here.
Most Americans don't behave like punk-ass teens who go about committing petty crime. Somehow I doubt they make the transformation when visiting Japan. ---