Tokonoma & Chigaidana in The Sims3. These are the architecture of traditional Japanese.
Tokonoma is about the size of about one or a half tatami mat and is set into a wall of a Japanese-style room. It is the place to put up scrolls or display flower arrangements. Its floor is made of wood and is a step higher than the rest of the room. In the past, it was a place where divinities were worshiped, but from the Muromachi(1392-1573) and the Azuchi-Momoyama Period(1573-1603) on it became a standard built-in feature with a decorative purpose. Recently, however in the average residence, there are many floor plans without tokonoma.