Matsuai’s 10-year-aged Soy Sauce “AWAYA” is crafted from marudaizu, whole soybeans, and wheat grown in Kumamoto without pesticides or chemical fertilizers during cultivation. Slowly aged using a low-temperature technique, this long maturation softens the sharpness of the salt and creates a deeply concentrated aroma and rich, mellow umami. The soy sauce carries the name “AWAYA,” honoring a historic family business that predates Matsuai, and has a rare, refined quality with a smooth, full-bodied flavor and a luxurious fragrance.