KIKKOMAN Soba Tsuyu Straight is a ready-to-use Japanese dipping and seasoning sauce, perfectly formulated for both hot and cold soba noodle dishes. Crafted with a blend of soy sauce, mirin, and rich bonito-based dashi, this tsuyu delivers a savory, slightly sweet, and umami-rich taste. Because it's "straight," it means it's pre-diluted and ready to use as is, without needing to add water.