Japanese people have a long history of eating tofu, a filling food that always goes well with a drink. It is made simply by grinding and cooking soybeans, before extracting and solidifying the soymilk. In the mountains, unique varieties of tofu emerged as a result of efforts to avoid wasting the precious beans. In an area of heavy winter snowfall, tofu plays an important part in an annual religious ceremony. We explore the secrets of tofu from across the islands of Japan.