I flipped past some crappy samurai documentary on the history channel the other day. It stated that Japanese people think of the belly as westerners do the heart. Like, a "big belly" means "kind and generous" (ref. "big hearted"). The documentary was trying to say that Seppuku (hara-kiri) was like cutting out your soul.
Does that explain, then, things like Hare+Guu, and this video (via)?
Is getting eaten like visiting the soul of the eater? This is the type of question that keeps me up at night.