Glass Tea House - KOU-AN is a chashitsu (teahouse) created by Japanese designer and artist Tokujin Yoshioka. The teahouse made its debut at the 54th La Biennale di Venezia in 2011. Starting with the exhibition at Tendai Sect Shōren-in, Kyoto in 2015, the teahouse is traveling inside Japan, and it is currently exhibited at the National Art Center, Tokyo.