In 2010 I've been to Japan to DesignFesta in Tokyo: it is a HUGE arts&crafts event, with usually 250.000/300.000 visitors in two days, and takes place twice a year. It is connected to a residential gallery in city center: it is about any kind of art, including performative arts. It has been a great time for me, japanese audience is lovely: at first when I did get there I wondered how people would notice my little space in such a huge and crowded environment, but it instead it turned out a wonderful experience. also sales turned out good considering that I had my space for one day only.
I wonder how would it be to have a Flatstock block in there =)
here's the link to a report video I made and to some photos so you may have an idea of mood and the place: