More information here for those interested
I admit, it's pretty pricy at $100, but right now B&N is selling all the Criterion movies for 50% off. Also, you get a LOT with this -- all six of the original movies, the English-dubbed 'Shogun Assassin', a silent documentary dating to 1937 about the making of samurai swords, and quite a few interviews and documentaries.
It sounds like a good deal for the current price, and I can remember when everyone who liked manga and Japanese film was talking about this series. Hopefully it appeals to someone here.