No, I don't believe the Japanese connect to the American Tama. Language issue. Coding issue... In a way, they may look simmilar, be simmilar, but they are pretty much a different version... (as far as I know)
I believe there is a Japanese version of Tamatown... I couldn't tell you where though. (because I don't Know where, but I think is under a Bandai.ttentama.jp something like that. I don't navigate the Japanese site very well... Not the older stuff anyway. I ventured a while ago, but memory has failed me.