The ninja used various tools and weapons on their secret missions. To protect themselves in dangerous situations, they used concealed weapons. Portable and hidden from view, some were even disguised as ordinary items. In this episode, we'll feature concealed weapons including the "amigasa," "kakute," "shikomi-tessen," and how they were used. We'll also join a ninja expert and recreate "hyorogan," the ultimate ninja ration, to learn the secrets behind its ingredients.