These are master fish handler and its easy when you have the right tools, whether it be a very sharp knife or a huge variety of seafood. The Tsukiji market is a must see even though you miss the very early morning auction. Its not just a fish market, it is a market for everything. Producers of foodstuff bring their wares here to be distributed to the rest of Japan. So one can find anything in season here. Its busy because of locals and visitors.