Red Zin' is dried soup stock made from mackerel, sardines and round herring. It's best suited to strong flavored dishes such as miso soup, oden (Japanese hodgepoge) and udon. 'Yellow Zin' is dried soup stock made from h igh-quality dried bonito and kelp. It's simple and light tasting, and can be used in various dishes such as miso soup, and Japanese Stewed dishes. Each package contains 18 dashi packs. Be sure to look for Odashi Uneno as they are hoping to schedule a Dashi workshop at the JCCCNC later this year! https://translate.google.com/translate?hl=en&sl=ja&u=http://odashi.com/&prev=search http://sharing-kyoto.com/shop_Odashi-Uneno