Though we did not meet Mariko because of a previous commitment, her arrangement to have the tour with her friend Guts was great! We had a wonderful time. We had been to Tsukiji Fish Market before, but it was a richer experience with Guts since he was able to explain more things to us. Also Mariko helped us by introducing us to another friend in Kumamoto, which was a huge help for another leg of our travels. Thanks for being a great resource for us in Japan!