"The Hiroyama Garden residential area is located in the southeastern part of Zushi City, Kanagawa Prefecture.
With views of Mt. Fuji and Enoshima to the west and Oshima to the south, this residential area is surrounded by a scenic and lush green environment. The land, which was created and developed in 1968 on the 80-meter-high Mt. Kotsubo, has maintained a generous and rich residential environment through thorough management and operation of landscape preservation, including strict building conditions and underground buried electrical facilities.
We decided to plan a weekend residence and guest room in this residential area, which is reputed to be the best in Japan.

The site is a northwest-facing corner lot facing a crossroads, with a maximum height difference of 2 meters between the north side road and the site. Because the site is elevated a step higher, the view to the northwest is excellent, and Enoshima Island and Mt. It was necessary to maximize the view while maintaining the privacy of the surrounding environment and both sides.

The building is composed of two wings, one large and one small, each with deep eaves, oriented in the north-south direction. The deep eaves are compatible with the Japanese climate, and the beautiful ridgelines of the roofs evoke a sense of Japanese beauty. The volume is divided into two halves, one of which is low in height, and the other is richly planted with trees, thereby reducing the sense of volume in the direction of height. The planting and the building coexist at the same level of volume, so as not to give an oppressive feeling to the surrounding area.

The south wing has three floors, two above ground and one below, with the LDK as a semi-public space on the first floor, private rooms on the second floor, and a theater room and bar in the basement. The second floor is a private room, and the basement is a theater room and bar. The north wing is a public space with a guest room and a study on two levels, and the height of the building is reduced by half a story in consideration of the view from the south wing.

The two skip-floor buildings are connected by a courtyard and a staircase with a sense of openness, bisecting the space while maintaining a gentle relationship between them.

The first floor has as few openings as possible in consideration of privacy and coexistence with the surrounding area, and light and ventilation are secured from the courtyards located in various places. The second floor balcony is a wooden rigid-frame structure (KES construction method) to maximize the window surface for the view. The height of the second-floor balcony's hip wall was set after careful consideration in order to block the view from the surrounding area while securing the view.

Natural materials such as solid wood for floors and ceilings and plaster for walls are used. As the months pass by, they acquire a deep luster and flavor. Slowly growing trees gradually cover the building, transforming it into an even greener and richer place.

Each location has its own local character and history.
The architecture must be appropriate for this place without being eccentric.
It should not shine with a glittering brilliance, but rather emit a profound and dull radiance. I turned my eyes once more to the Japanese sense of beauty, as in shrines and temples. It is not brightness, thinness of structural materials, or lightness. It is important to have a thick and strong framework and a shadowy space. This building will shine with a deep luster and acquire a more profound atmosphere over the years to come. I sincerely hope that it will continue to exist for a long time and become an architecture that evokes the "beauty" of Japan.


  • Completion 2018.07
  • Building site Zushi City, Kanagawa Prefecture
  • Principal use private residence
  • Structure Wooden 3-story building
  • Photo Nacasa & Partners


  • 2019 Dedalo Minosse exhibition catalogue 2018/2019(イタリア)
  • 2022 Architecture Single Residence Japan Winner