Yeah, I never think to go to Wikipedia to get answers...for some reason. What you`ve linked could be though. Not sure my father in law would be that as philosophical about it as that...but the moat concept, you know the floating castle thing, does sound like something that would fit in with the Japanese way of looking at things from my experience here. The circle being seen as completeness is something that appears in many cultures I believe. All very interesting...can it be Wikipedia actually came through this time?