So I went to the Tokyo Stock Exchange... on the basis of "why not". I don't really know why, but I expected to see something exciting. However, they replaced the trading floor with a computer system several years ago, and now it is just a few computers in a fancy room with a few employees calmly glancing at screens, while the computers do all the work.
I was told the Tokyo market works differently than other markets because it is a pure auction- computers matching buy and sell orders.
Most interestingly, the stock market has a LUNCH BREAK!! They are only open like 4 hours a day, but of course trading can happen outside those hours when a computer system monitors trades (instead of the calm people in the pictures).