I may have mentioned some time ago that the name of the restaurant Wagamama was a little rude. Well, here's what I found (and it matches with my recollection):

"Wagamama means selfish, willful; in a culture where personal sacrifice is the highest virtue, the connotation is far harsher."

From http://www.farfilm.com/peggy/articles/parasites.htm which also mostly fits in with my experience of Japanese culture, though while I was there in 1992 it was in the early stages.