An afternoon at Tokyo’s Tsujiki Outer Market introduced me to the art of Japanese shopping. This is Japan’s “Food Town,” featuring every imaginable traditional Japanese food. It’s raucous and noisy but in a very polite, Japanese way. One main and three side streets feature stalls of the finest, just off the hook sushi-grade fillets in rainbow display. Or blast-cooked, in season oysters. Luscious! Grills smoke, griddles spit and the whole …