The yo-jō-han, 四畳半, four-mat-half Tearoom, may be perceived as the center of the world, the world of Chanoyu, certainly. It can be a calendar and a map. When viewed as a map, the simplest division is its directions. In the ideally placed tearoom, this would be due north, south, east, and west. While the ideal placement is not always possible, the North is established by the presence of a toko-no-ma, 床の間, bed/floor’s-room. It is an alcove located toward the East. This is to protect against the harsh influences from the Northeast.   The width of the tokonoma is half the width of the wall.  This direction is called...