chasoba noodles are Japanese noodles made from buckwheat flour, and are often used in the preparation of cold noodle dishes. they are usually served with a sauce made from dashi (a basic broth used in Japanese cuisine that is made from kelp and dried bonito), rice vinegar, mirin (a mild, slightly sweet Japanese rice wine) and wasabi (a pungent Japanese herb). Chasoba noodles have a tender texture and are lightly flavoured with buckwheat. They are often served as a main course or as a side dish for grilled fish or meat dishes.