Wedge House Nyumba Yokhalamo by Kiyoshi Sugimoto

Wedge House Nyumba Yokhalamo by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 Mphoto ya Bronze ya A' Design Award in Mapangidwe a Nyumba, Zomanga ndi Zomangidwa Competition Category.

BronzeZomangamanga· 2025

Wedge House Nyumba Yokhalamo

by Kiyoshi Sugimoto

Client: Masato Ikuta

Mphoto ya Bronze ya A' Design Award Winner in Zomangamanga Category

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Colors

The Design

About Wedge House Nyumba Yokhalamo

Wedge House ndi nyumba ya makonde atatu yomangidwa pa malo opapatiza okhala ndi phiri lotsetsereka mumzinda wa Ikeda ku Japan. Kaonekedwe ka mbali yake ngati chikwakwa amayika padoko lalikulu kwambiri pamwamba ndipo padoko laling'ono kwambiri pansi pa nthaka, kotero kuti palibe mphamvu yowonjezera imene ikuponderezedwa pa khoma lakale loteteza nthaka. Makonde awiri apamwamba amamangidwa ndi matabwa, pamene chipinda chapansi (basement) chimamangidwa ndi konkire yolimbitsidwa ndi chitsulo. Makoma a kum'mawa ndi kumadzulo amamalizidwa ndi mbale zachitsulo zokutidwa ndi siliva, zomwe zimagwirizira pansi paulendo wotambasuka (cantilevered floor) ndikupanga chimango cha maonekedwe kumwera. Malo okhalamo pa konde lachiwiri amatsegukira pa terrace yomwe imapereka maonekedwe otambalala.

The Recognition

About the Mphoto ya Bronze ya A' Design Award

Wedge House Nyumba Yokhalamo ndi mmodzi mwa opambana a Mphoto ya Bronze ya A' Design Award, kuzindikirika kolemekezeka kwambiri komwe kumaperekedwa kwa mapangidwe abwino kwambiri omwe amaonekera ndi luso lolenga, kuchenjera ndi nzeru zakuthwa. Opambana a Bronze ndi zinthu zaluso kwambiri ndi zolenga modabwitsa zomwe zimatsimikizira zochitika zazikulu, kulingalira ndi kuchenjera kwa opanga awo. Wedge House Nyumba Yokhalamo akuyembekezeka kukhala chinthu choyamikiridwa, chosirira ndi chokondedwa, chaukatswiri wapadera ndi chatsopano. Mapangidwe opambana Mphoto ya Bronze ya A' Design Award awa amaphatikiza machitidwe abwino kwambiri a luso, sayansi, kapangidwe ndi ukadaulo ndipo ndi abwino kwambiri chifukwa cha kusamala kwawo zazing'ono. Wedge House Nyumba Yokhalamo amakwaniritsa zosowa mokongola, kukhudza zilakolako, kukopa mitima ndi kudzutsa chidwi.

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