Usukuchi is a light soy sauce made using a special process that makes the color lighter while retaining as much flavor as conventional soy sauce. Usukuchi is used for keeping the color of foods appetizing while still adding the full-bodied flavor of soy sauce. It is commonly used in soups, sauces, and braises to retain more natural color for upscale meals such as kaiseki.
Light soy sauce is essential in achieving aesthetic food where the vibrant colors are not masked by the dark color of soy!