Umami, the fifth taste that has attracted the world's attention, is a world-renowned "basic taste" that was born in Japan. If the ``dashi'' is strong, there is no need to add flavor later, so less seasoning is required, resulting in a reasonably priced and healthy dish. Therefore, this book provides a thorough explanation of the basics of dashi. They sell Japanese-style soups such as ``bonito soup,'' ``kelp soup,'' and ``shiitake soup,'' Western-style soups such as ``chicken bouillon,'' and Chinese soups made with chicken bones. The supervision is by Shigeki Kokubo, the owner of Akasaka Marushige. We will tell you everything about the secret to the deliciousness of this popular restaurant, which is flooded with reservations, starting with how to choose the ingredients. Introducing how to make dashi to save time, with easy-to-understand photos. We also include recipes for dishes using each type of ``dashi'' and soup. Please try using your own ``dashi'' and experience the difference in taste from regular dishes.