Abstract
There are two kinds on the position of a main room in the main house, right hand and left hand. Annexes usually are arranged to the lower part in the site (opposite side to a main room). So, the architectural landscape is different by the position of a main room. There are three reasons of being much more right hand main rooms including a main room are directed southerly among all the compass directions. In the next, the main room in the southerly direction is posited to the right hand, because of wishing sun rise. Finally, the right hand main room facing southerly have great advantage to the wind direction in summer and winter. There are seven reasons on the left hand main room, belief and convention, relationship to the neighboring house, drainage, water supply, building process of a main house, conditions of a site, and, compass direction and weather conditions.
