Because of this, collectors who enjoyed the many designs and colors of began meeting to exchange them with one another; first, the meetings took place at private homes, and then later were arranged for public places like restaurants and expensive tea houses. According to Kiritani's "Vanishing Japan", the oldest surviving invitation card to a meeting dates back to 1799. Due to the growing popularity of meetings, the government enforced a law forbidding their trading, which did not stop the meetings from taking place. meetings continue to this day, with collectors and aficionados alike meeting to share and trade their own designs as well as admire others.