Strangest Japanese Videogame Genres Discussed

Thanks to GameSpy for their column discussing a number of videogame genres that are popular in Japan, but not in the West. Picks include the more obvious such as dating sims ("Players look through the eyes of a young man and try to woo a variety of girls by making the proper dialogue choices"), pet raising sims ("where you raise and, uh, feed an everyday hamster... or a rhinoceros beetle"), and even voyeurism-based titles such as Primal Image, where "...poorly constructed 3D women with frightening facial features played brief animated sequences while you took pictures before the time limit ran out." Have Japanese-only genres such as dating got the capacity to take off in the States?