Well theres Amemura in Osaka - tranlates to "American Village". Its just a shopping district though.Well, I would not call Cabramatta in Sydney for instance ,a fine example of cultural integration. Generally, Asian people stick together, and are opposed to inter-racial relationships and marriage.
I don't like Chinatowns, they encourage segregation. Do you think you would be able to go to Beijing and build an "Australia Town". You would be laughed at! So why do we allow it, and they don't?
But I do agree with your point in that the Chinese as a nation are culturally closed and although very rich in heritage, they are not mature culturally, and very inward focussed people. Thats just my experience.
But I do not see that as any reason for us not to celebrate our diversity by having these type of developments. It does lead to less integration but on the positive it allows many Australians to experience another culture that may not otherwise do so. I think these things as a whole are a benefit to the rest of our society. I for one do not want immigrants to be entirely integrated into traditional Australian society and ways, I like them to be proud of their culture and show that to to the rest of Australia by displaying it in these developments. It adds to the rich fabric of our society.