Tokyo's Tsukiji market is a must-visit destination for any food lover. You'll find not only fresh fish there, but everything needed to create an authentic Japanese meal. This program spotlights one particular ingredient -- katsuobushi (a.k.a. bonito flakes). The flakes, which are shaved from rock-hard slabs of fermented fish, are used in the soup base of almost every Japanese dish and are the essence of umami.