Wedge House Ebe Obibi by Kiyoshi Sugimoto

Wedge House Ebe Obibi by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 Ihe Nrite A' Design Award nke Bronz in Nhazi Ụlọ Owu, Ụlọ na Ihe Owuwu Competition Category.

BronzỤlọ Owu· 2025

Wedge House Ebe Obibi

by Kiyoshi Sugimoto

Client: Masato Ikuta

Ihe Nrite A' Design Award nke Bronz Winner in Ụlọ Owu Category

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The Design

About Wedge House Ebe Obibi

Wedge House bụ ụlọ obibi nwere ogo atọ nke e wuru n'ala warara nke nwere ugwu dị nkọ na Obodo Ikeda, Japan. Ọdịdị ya dị ka ngiga na-eme ka ala kasị obosara dịrị n'elu, ebe ala kasị nta dịkwa n'okpuru ala, ka ike ọ bụla ghara ịdakwasị mgbidi ochie na-ejide ala. Ogo abụọ dị n'elu ka e ji osisi wuo, ebe okpuru ụlọ ka e ji ntakịrị mkpọ na sement (reinforced concrete) wuo. Mgbidi dị n'ọwụwa anyanwụ na ọdịda anyanwụ ka e ji mbadamba igwe agba ọla ọcha kpuchie, nke na-akwado ala na-apụ apụ (cantilevered floor) ma na-egosipụta ọhụụ gawara n'ebe ndịda. Ebe obibi dị n'ogo nke abụọ na-emepe gaa na terês nke nwere ọhụụ sara mbara.

The Recognition

About the Ihe Nrite A' Design Award nke Bronz

Wedge House Ebe Obibi meriri A' Design Award nke Bronz, nnabata dị oke ugwu e nyere design ndị pụtara ìhè nke a ma ama maka nzụlite ihe, ọgụgụ isi na nghọta. Ndị meriri na Bronz bụ ihe e mere nke ndị nwere nka nke ukwuu ma dị mma n'imepụta nke na-egosi ahụmahụ buru ibu, echiche na ọgụgụ isi nke ndị designer ha. A na-atụ anya na Wedge House Ebe Obibi ga-abụ ihe a na-asọpụrụ nke ukwuu, a na-eto na a hụrụ n'anya, nke dị oke ọrụ ma dị ọhụrụ. Design a meriri A' Design Award nke Bronz na-agụnye ụzọ kacha mma n'ime nka, sayensị, design na teknụzụ, ma dị mma nke ukwuu maka nlebara anya ya n'obere ihe. Wedge House Ebe Obibi na-emezu mkpa nke ọma, na-emetụ ọchịchọ aka, na-adọrọ mmetụta obi ma na-adọta ọchịchọ ịmara.

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