Wedge House Rezidencija by Kiyoshi Sugimoto

Wedge House Rezidencija by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 Brončana nagrada A' Design Award in Dizajn Arhitekture, Zgrada i Konstrukcija Competition Category.

BronzaArhitektura· 2025

Wedge House Rezidencija

by Kiyoshi Sugimoto

Client: Masato Ikuta

Brončana nagrada A' Design Award Winner in Arhitektura Category

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Verified Award Winner

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The Design

About Wedge House Rezidencija

Kuća Klin je trospratna rezidencija izgrađena na uskoj parceli sa strmim nagibom u gradu Ikeda u Japanu. Klinasti presjek smješta najveću etažu na vrh, a najmanju ispod nivoa zemlje, tako da se na stari potporni zid ne prenosi nikakva dodatna sila. Dvije gornje etaže su izrađene od drveta, dok je podrum izrađen od armiranog betona. Istočni i zapadni zid su obrađeni srebrno obloženim čeličnim pločama koje podupiru konzolnu etažu i uokviruju pogled prema jugu. Dnevni boravak na drugom spratu otvara se prema terasi sa širokim pogledom.

The Recognition

About the Brončana nagrada A' Design Award

Wedge House Rezidencija je pobjednik Brončane nagrade A' Design Award, visoko prestižnog priznanja koje se dodjeljuje izvanrednim dizajnima što se odlikuju kreativnošću, domišljatošću i oštroumnošću. Brončani pobjednici izdašno su vješti i upečatljivo kreativni artefakti koji potvrđuju golemo iskustvo, maštu i snalažljivost svojih dizajnera. Očekuje se da Wedge House Rezidencija bude visoko cijenjen, voljen i njegovan predmet koji je izuzetno profesionalan i inovativan. Ovaj dizajn koji je osvojio Brončanu nagradu A' Design Award uključuje najbolje prakse u umjetnosti, nauci, dizajnu i tehnologiji i izvrstan je zbog pažnje posvećene detaljima. Wedge House Rezidencija sjajno zadovoljava potrebe, dotiče želje, očarava osjećaje i privlači znatiželju.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: The site has a nice view, but it is narrow and has a steep slope, and due to area regulations, the building coverage ratio is a strict 40%.
In order to meet the required area to comply with strict regulations, we adopted a three-story mixed structure with two floors above ground made of wood and one floor below ground made of reinforced concrete.
The building has a wedge-shaped shape, with the second floor, which has the best view, as the living space and the largest area, and the area decreases as you go to the lower floors to avoid applying force to the retaining wall.
Dimensions & Packaging: Total floor area 111.16㎡　Width 5560mm x Depth 11000mm x Height 10190mm
Tags: Slopingland structure protruding structure wedge Basement mountainside
Production Technology: The east and west walls are finished with silver galvalume steel plates, which support the cantilevered floor that protrudes from the basement, and at the same time serve to frame the view to the south.
The basement is a bedroom with a sense of security that feels like it's nestled on a slope. The first floor has a water area and a study with a view of the greenery of the park behind the deep eaves. From the sky terrace of the LDK on the 2nd floor, you can enjoy a panoramic view of the Osaka plains. This is a house where you can enjoy the three different slopes of Mt. Satsuki.
Design Challenge: Stable structural design with an underground shape that does not apply force to old retaining walls on a narrow, steeply sloped site, and a protruding structure for the wooden upper building.
Research: Research on stable structures with protruding shapes in wooden buildings
Inspiration: The site is located at the foot of Mt.Satsuki in Ikeda City, Osaka Prefecture, Japan. The site was narrow, and more than half of the site was on a steep slope.
Additionally, the site is located on an old, tall retaining wall, so the building had to be constructed in a way that would not put stress on the retaining wall.
Therefore, the building's cross-sectional shape is wedge-shaped, with the basement being the smallest and increasing as the floors rise.
Project Duration: Design for the project began in September 2022 at a site in Ikeda City, Osaka Prefecture, and was completed in June 2024.
Operation Flow: A basement with a shape that does not apply force to the old retaining wall, and a pop-out floor structure for the upper wooden building to maintain the required area.
Team Members: KIYOSHI SUGIMOTO
Image Credits: All photos and videos Hirofumi Imanishi