The white house of one-story is located in a rural landscape. Its spatial composition is really simple, being closed toward the outside by 3 vertical surfaces and a horizontal plane, has a semitransparent wall and a tunnel as the entrance in the principal façade. Thanks to this glass wall, sunshine reaches into the rooms during the daytime, and the house changes to a luminous box in the darkness.The interior is composed of the 2 type spaces. In the North side we arrange some small rooms such as walk-in-closet or utility room in a line. These closed rooms have ventilation openings. In the South side, we connect lineally the main rooms with a wide courtyard. The unification of white color unifies the inside and out and makes the boundary indefinable. Particularly the LDK has good continuity with this white courtyard thanks to fully opening windows and using the same floor of porcelain tile. The white floor increase the sunlight taken in still more.