My friend from the United States asked me, “What is Warabi Mochi?” I said, “It’s a transparent rice cake, which is usually covered with Kinako, sweet soybean powder.” But I was wrong. Warabi Mochi is not a rice cake. It is made from a starch extracted from the roots of a plant, Warabi. It is actually very similar to Tapioca. Tapioca is also made from a starch extracted from the roots of the cassava plant. Since I did not know how Warabi Mochi is made, I provided the wrong information to my friend. To be a good tour guide, studying English is not enough. It is also important to have a lot of knowledge about Japanese things.