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Wedge House Loĝejo by Kiyoshi Sugimoto

Wedge House Loĝejo by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 Bronza A' Design Award in Dezajno de Arkitekturo, Konstruaĵoj kaj Strukturoj Competition Category.


BronzoArkitekturo· 2025

Wedge House Loĝejo

by Kiyoshi Sugimoto

Client: Masato Ikuta

Bronza A' Design Award Winner in Arkitekturo Category

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Verified Award Winner

Verify Award Status for #162815

Colors

The Design

About Wedge House Loĝejo

Kojnodomo estas trietaĝa loĝejo konstruita sur mallarĝa terpeco kun kruta deklivo en la urbo Ikeda, Japanio. La kojnoforma tersekcio metas la plej grandan etaĝon supre kaj la plej malgrandan etaĝon sub la tersurfaco, tiel ke neniu aldona forto estas aplikata al malnova subtena muro. La du supraj etaĝoj estas faritaj el ligno, kaj la kelo estas farita el armita betono. La orientaj kaj okcidentaj muroj estas finpretigitaj per arĝentkovritaj ŝtalaj plakoj, kiuj subtenas la elstarantan etaĝon kaj enkadrigas la vidon suden. La loĝejo en la dua etaĝo malfermiĝas al teraso kun vasta panoramo.

The Recognition

About the Bronza A' Design Award

Wedge House Loĝejo estas gajninto de la Bronza A' Design Award, tre prestiĝa rekono donata al elstaraj dezajnoj distingitaj per kreemo, ingenieco kaj sagaco. La Bronzaj gajnintoj estas abunde lertaj kaj frape kreemaj artefaktoj, kiuj aŭtentikigas la vastan sperton, imagpovon kaj elturniĝemon de siaj dezajnistoj. Oni atendas, ke Wedge House Loĝejo estu tre estimata, admirata kaj ŝatata objekto, kiu estas rimarkinde profesia kaj nova. Ĉi tiu dezajno gajninta la Bronzan A' Design Award enkorpigas plej bonajn praktikojn en arto, scienco, dezajno kaj teknologio, kaj estas bonega pro sia atento al detaloj. Wedge House Loĝejo bonege kontentigas bezonojn, tuŝas dezirojn, ĉarmas sentojn kaj allogas scivolemon.

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.
Patents
Copyright 2024 Kiyoshi Sugimoto.
Team Members
KIYOSHI SUGIMOTO
Image Credits
All photos and videos Hirofumi Imanishi

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