Wedge House Rezidans by Kiyoshi Sugimoto

Wedge House Rezidans by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 A' Design Award Bwonz in Achitekti Competition Category.

BwonzAchitekti· 2025

Wedge House Rezidans

by Kiyoshi Sugimoto

Client: Masato Ikuta

A' Design Award Bwonz Winner in Achitekti Category

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Verified Award Winner
Verify Award Status for #162815

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Colors

The Design

About Wedge House Rezidans

Wedge House se yon rezidans twa etaj ki bati sou yon teren etwat ak yon pant apik nan Vil Ikeda, nan Japon. Koup transvèsal ki gen fòm koen an mete etaj ki pi gwo a anlè, ak etaj ki pi piti a anba tè, pou okenn fòs siplemantè pa aplike sou yon ansyen miray sipò. De etaj anwo yo fèt an bwa, epi sousòl la fèt an beton ame. Miray lès ak lwès yo fini ak plak asye ki gen kouvèti ajan, ki sipòte etaj ki fè sòti (kantilve) a epi ki ankadre vi a nan direksyon sid la. Espas pou viv la nan dezyèm etaj la ouvri sou yon teras ak yon bèl vi laj.

The Recognition

About the A' Design Award Bwonz

Wedge House Rezidans se yon ganyan A' Design Award Bwonz, yon rekonesans ki gen anpil prestij yo bay design ekselan ki make pa kreyativite, enjenyozite ak finès. Ganyan Bwonz yo se objè ki abil anpil e ki kreyatif nan fason ki frape, ki otantifye gwo eksperyans, imajinasyon ak debouyaj designer yo. Yo atann Wedge House Rezidans pou se yon objè anpil moun estime, admire e renmen, ki pwofesyonèl e inovatè nan fason remakab. Design sa a ki ganyen A' Design Award Bwonz enkòpore pi bon pratik nan atizay, syans, design ak teknoloji, e li ekselan pou atansyon li bay detay. Wedge House Rezidans satisfè bezwen yon fason espledid, li touche dezi, li chame santiman e li atire kiryozite.

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