Japan's mountain yams, yamaimo, are an extremely versatile ingredient. Grated, they're enjoyed on rice in a sticky yet delicious paste. When cooked, they take on a range of textures and flavors. On this episode, we visit farmers to discover the labor-intensive methods used to create perfect yams, explore a centuries-old restaurant that offers a variety of traditional yam-based dishes, and even see how they're used to create sweet Japanese confections.