A weekend house for a couple located on a rocky coast two hours drive from Tokyo. The site is a rocky stretch facing the Pacific Ocean with approaches sloping down to the water level. The characteristic of its plan, imagined like the branches of a tree, is a continuous one room. All the required spaces, entrance, living area, dining area, kitchen, bed room, Japanese style room, study room and bath room are arranged in this continuous one room. Oriented in different directions, one can find various views of the ocean walking throughout the house. Living area, bedroom and bathroom each has its unique relation to the ocean. Architecture as primitive, “in-between natural and man-made”.