Kyoto hosts two wonderful outdoor flee markets that brings crowds from all around the world ..one at Toji Temple, and the other Kita no Tenmangu. The market at Toji (Kobo-san by locals) is held on the 21st of every month, on the grounds of Toji. Arrive very early! On the 25th, "Tenjin-san" is held at Kita no Tenmangu Shrine.
Though they take place on religious grounds, the overall feel at these events is that of a lively and exciting flee market. You can find antiques, clothing, statues, fabric, kimonos, and ceramic tea bowls.