Squid is boiled with soy sauce, sake and so forth. It should be for not longer than 5 or 6 min. Or squid could become firm. In the same seasoning, Japanese radish with a bit of ginger is cooked for some 10 min. Then, both of materials are mixed on a dish. Very simple. We love it very much.
I could hear some friends in foreign countries claim they won't try such as squid. They won't know one of the good things in the world throughout their lives. Sorry for that.