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These are the sweets my wife and I chose to buy as souvenir from Kagawa prefecture. The brown one is called "Kawara Sembei"(Tile-shaped hard cracker). This is really hard so that I won't recommend it for older people without strong teeth and jaws. I like it because it maintains the shape in my mouth for quite a long period, maybe 30 minutes to 1 hour, during which I can enjoy the taste. - MT