Idẹ Ìkọ́lé · 2025

Wedge House Ibugbe

by Kiyoshi Sugimoto

Àmì-ẹ̀yẹ Idẹ A' Design Award 2025 in Ìkọ́lé
CLIENT: Masato Ikuta
Estimated Number of Design Views: 12,587
Verification code AF0303626D · Verify this award

Visit Site View at A' Design Award Press Release

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About Wedge House Ibugbe

Ile Wedge jẹ́ ibugbe ilé ìtẹ̀mọ́lé mẹ́ta tí a kọ́ sórí ilẹ̀ tóóró tí ó ní ìtẹ̀gùn gíga ní Ìlú Ikeda, ní Japan. Apẹrẹ ìdíwọ̀n rẹ̀ tí ó dàbí wẹ́jì gbé ilẹ̀ tí ó tóbi jùlọ sí òkè, tí ilẹ̀ tí ó kéré jùlọ sì wà nísàlẹ̀ ilẹ̀, láti rí i dájú pé kò sí agbára àfikún tí a fi kún ògiri ìdádúró àtijọ́. Ilẹ̀ méjì tí ó wà lókè ni a fi igi kọ́, nígbà tí ìsàlẹ̀ ilé (basement) fi kọnkiríti tí a fún lókun (reinforced concrete) ṣe. Ògiri ìhà ìlà-oòrùn àti ìwọ̀-oòrùn ni a fi àwo irin tí a bò ní fàdákà parí, èyí tí ó ń gbé ilẹ̀ cantilever náà pẹ̀lú, tí ó sì ń ṣe férémù ìwòye sí ìhà gúúsù. Àgbàlá ìgbàlódé tí ó wà ní ilẹ̀ kejì ṣí sílẹ̀ sí terace kan tí ó ní ìwòye gbígbòòrò.

About the Àmì-ẹ̀yẹ Idẹ A' Design Award

Wedge House Ibugbe jẹ́ olùborí Àmì-ẹ̀yẹ Idẹ A' Design Award, ìdánimọ̀ olókìkí gan-an tí a fún àwọn àwòṣe tó tayọ tí wọ́n yàtọ̀ nípasẹ̀ ìṣẹ̀dá, àrékérekè àti ọgbọ́n inú. Àwọn olùborí Idẹ jẹ́ àwọn ohun èlò tó ní ìjáfáfá gan-an tí wọ́n sì ní ìṣẹ̀dá tó yani lẹ́nu tí wọ́n ń ṣe ẹ̀rí ìrírí gbígbòòrò, ìrònú àti ọgbọ́n àwọn olùṣàwòṣe wọn. A retí pé Wedge House Ibugbe yóò jẹ́ ohun tí a kà sí gidigidi, tí a gbóríyìn fún tí a sì nífẹ̀ẹ́, tó jẹ́ ti ọ̀jáfáfá lọ́nà tó ṣe pàtàkì tó sì ní ìmúṣẹ̀dá tuntun. Àwòṣe tó borí Àmì-ẹ̀yẹ Idẹ A' Design Award yìí ń kó àwọn ọ̀nà tó dára jùlọ nínú iṣẹ́ ọnà, sáyẹ́ǹsì, àwòṣe àti ìmọ̀-ẹ̀rọ jọ, ó sì tayọ nítorí àfiyèsí rẹ̀ sí àwọn àlàyé kékeré. Wedge House Ibugbe ń tẹ́ àwọn ohun tí a nílò lọ́rùn lọ́nà àgbàyanu, ó ń fọwọ́ kan àwọn ìfẹ́ inú, ó ń gbà ọkàn ó sì ń fa ìfẹ́ láti mọ̀ mọ́ra.

Press Kit

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.
Image Credits: All photos and videos Hirofumi Imanishi