I'm curious, what makes you ask if scallops from Japan are good? Are you considering trying them out for the first time, or have you had them before and are wondering about the quality? It's known that Japanese cuisine places a high emphasis on fresh, seasonal ingredients, and seafood is a staple of their diet. So, in general, it's likely that scallops sourced from Japan would be of high quality, but of course, there can always be variation depending on factors like when and where they were caught, how they were handled and prepared, and even personal taste preferences. Have you had any specific concerns or questions about Japanese scallops that you'd like to explore further?