As far as the sushi is concerned; When Bill asks Beatrix if his (Hanzo’s) sushi had gotten any better… it was just Tarantino taking a stab at Okinawa’s sushi in general. Okinawa is known for it’s horrible sushi… at least in Japan it’s well known that you just don’t eat sushi in Okinawa. Tarantino, I think, was just poking fun at that.
