The Tsukiji Market
This is where most of the sushi comes from. The biggest and the best fish market in the world. I couldn't even understand half of the items available there. The market sells around 400 types of seafood, from weeds to caviar. There are two parts to this market, the outer market and the inner market. While the inner market is restricted to tourists on most days, the outer market is equally fun. There are various small sushi counters to grab some yummy delicacy. The best part of this market is the Tuna Auction that takes place early in the morning at 5 am. Very few tourists are allowed in (first come, first serve basis) but it is worth an effort!