The Chashitsu (teahouse) is the main setting of the ceremony. The host enters through the Sadouguchi, a full sized sliding door, and kneels on his Temaeza, the particular tatami mat on which he prepares tea and lights the charcoal fire. The guests enter through the Nijiriguchi, the small opening that the guests must crawl in order to demonstrate their humility and respect. The Tokonoma, the alcove, is the most important section of the room because it displays the scroll (Kakejiku) and flowers (Chabana) in a vase that reflect the season, time of day, and occasion.
(TJTC)
(TJTC)