Japanese Clam Soup. In spring, people across Japan savor clam soup, as this season is the prime time to enjoy it at its most savory. Clams hibernate in winter and come out to spawn in summer. Since their flavor diminishes after spawning, spring is the best season for eating clams. In Japan, the shape of the clam also symbolizes "conjugal harmony," which is why this soup is named "Blooming Flowers and Full Moon" (representing marital bliss). Japanese Clam Soup is made with clams as the main ingredient, paired with unsalted butter, water, sake, miso, salt, and chopped scallions, and prepared using techniques such as pan-frying and boiling, resulting in an extraordinarily delicious flavor.