I really tried to get in touch with someone about the JP RP community, but just couldn't find anyone fluent enough with the JP community to figure it out. This was the best I got for my efforts, one of them linked me to the wiki article on Japanese pen and paper roleplaying, which suggests that at least in some ways they RP like westerners do:
http://en.wikipedia.org/wiki/Japanese_ro...ying_games
http://en.wikipedia.org/wiki/Japanese_ro...ying_games