In Japanese tradition, architectural spaces designed to be used for tea ceremony (chanoyu) gatherings are known as chashitsu (茶室, literally "tea rooms").
The architectural style that developed for chashitsu is referred to as the sukiya style (sukiya-zukuri), and the term sukiya (数奇屋) may be used as a synonym for chashitsu. Related Japanese terms are chaseki (茶席), broadly meaning "place for tea," and implying any sort of space where people are seated to participate in tea ceremony, and chabana, "tea flowers", the style of flower arrangement associated with the tea ceremony.
Typical features of chashitsu are shōji windows and sliding doors made of wooden lattice covered in a translucent Japanese paper; tatami mat floors; a tokonoma alcove; and simple, subdued colours and style. The ideal floor size of a chashitsu is 4.5 tatami mats.(Wikipedia)
"Japanese Tea House"