波止浜の家 House of Hashihama

This two-family house was planned in a residential area facing a national highway in Imabari City, Shikoku.
The national highway passing nearby has a heavy traffic volume, and the challenge was to ensure privacy from the outside and to separate the lives of the parent and child households with a good sense of distance between them. In addition, the number of rooms would naturally increase for a two-family house, and it was assumed that adequate ventilation and lighting would need to be taken into consideration.

First, a RC wall was built around the perimeter of the site. This was to block noise and sight lines from the busy national highway.

Next, for convenience, it was decided to divide the house into two large groups: the parent household on the first floor and the child household on the second floor.
The first floor is divided into three volumes: a shared LDK + water area where the whole family can gather, a living room + bedroom for the parents, and a common area such as the entrance to the garage. The first floor is divided into three volumes. By arranging them in a staggered arrangement with a central corridor, a garden is provided between each volume, creating a good sense of distance by connecting them via the central corridor. The garden also allows each room to have ventilation and lighting.

The second floor has a double-skin structure with translucent glass covering the perimeter, which allows for large openings on the inside, providing light and a sense of openness while blocking the view from the outside and ensuring privacy. The high-sided windows with sloping ceilings and the courtyard provide ventilation and lighting to each room on the second floor.

The RC wall on the perimeter of the site, the painted wall volume on the first floor, the glass box on top of the wall, and the metal plate of the sloping roof are all made of different materials, giving a sense of lightness to the large volume and a sense of oppression to the surroundings. The building is made of different materials to give a lightness to the large volume and to make it feel less oppressive to the surrounding environment.

The building is closed to the surrounding area to ensure privacy, but by utilizing the gaps created by staggering the volumes, a bright and comfortable living environment with good ventilation and lighting was realized.


  • Completion 2012.06
  • Building site Imabari City, Ehime
  • Principal use private residence
  • Structure RC, 2 stories
  • Photo Toru Kitamura