There was no special lecture, just a really fun, nice tour at the behind the scenes workings of the Tsukiji fish market. The tour guide was very friendly, informative, helpful and understanding in showing us around and making sure we knew the history and interesting details of Tsukiji. This is a must if you are at all interested in sushi or the fish market culture of Japan. The sushi restaurant at the end of the tour is especially great. The sushi chefs are delightful, entertaining and willing to take questions, even obvious ones from clueless Americans. The sushi is the best I have ever had. The walk through the fish market is another highlight. It's a little busy and dangerous, but very interesting to see all the wholesalers in their grubby fishmonger gear chopping fish heads and sawing frozen tuna into slices. Overall, a great experience!