Our focus today is fugu, or pufferfish. As one of Japan's great winter delicacies, it is eaten as nearly-transparent slices of sashimi, or in umami-packed hot pots. Even in seafood-loving Japan, fugu is a special treat that is among the most expensive fish. It's also known for containing lethal amounts of poison, requiring chefs to obtain a special license in order to prepare it. Dive in to learn more about the various methods devised to provide quality flavor while also ensuring safety.