In other words much of Japanese culture, be it traditional or pop, sees the kind of japanese role playing games Codexia believes to be the only kind of japanese role playing games in a way not so different of how Codexia does see them. The difference, however, is that, based on my own experience at least, Japan in general does not consider role playing games to be an interest acceptable for a reasonable adult, and thus the games are actually designed to be childish, adolescent, immature, and lifeless otaku-ish, and in most social circles carry the same stygma of being a total loser as being a total dungeons and dragons nerd carries in the west.
And neither would the west, traditionally at least, accept such pastimes and hobbies as belonging to reasonable adults. Even many of those who consider reasonable adults can enjoy gaming in an involved way would consider any adult who invest so much time and effort in a game as a hardcore role playing game demands while having a career, a job, a spouse, children, relatives, many social and professional responsabilities, his own personal development, and more to worry about or to entertain himself with immature, childish, and in no way "reasonable." That western culture is rapidly losing that may as well be a sign of the decline.