Our theme for this episode is grilling. We'll be making Goko-yaki, named for its "five aroma" sauce, seared rare tuna with plenty of sesame seeds. Tuna is very popular served as sashimi, but it's also delicious when cooked. The sauce is made with 5 ingredients -- Myoga ginger bud, shiso, natto, wasabi and sesame seeds -- with refreshing flavors that make this a perfect dish for summer. For our side dish, we'll be cooking green bell peppers, a summer vegetable, and seasoning them with umeboshi pickled plums and nori seaweed, for a deliciously Japanese flavor and aroma.