Wedge House Hale Noho by Kiyoshi Sugimoto

Wedge House Hale Noho by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 A' Design Award Keleawe in Hoʻolālā Hale, Kūkulu a me Hōʻuluʻulu Competition Category.

KeleaweHoʻolālā Hale· 2025

Wedge House Hale Noho

by Kiyoshi Sugimoto

Client: Masato Ikuta

A' Design Award Keleawe Winner in Hoʻolālā Hale Category

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Verified Award Winner

Verify Award Status for #162815

Visit Site View at A' Design Award Press Release Award Badge

Colors

The Design

About Wedge House Hale Noho

ʻO ka Hale Wedge kahi hale noho ʻekolu papahele i kūkulu ʻia ma kahi ʻāina lāʻiki me ka pae kiʻekiʻe i ke kūlanakauhale ʻo Ikeda, Iapana. ʻO ke ʻano wedge o ka ʻāpana keʻa e hoʻonoho ai i ka papahele nui loa ma luna a me ka papahele liʻiliʻi loa ma lalo o ka honua, i ʻole e kau ʻia kekahi ikaika hou ma luna o ka pā paʻa kahiko. Hana ʻia nā papahele ʻelua ma luna me ka lāʻau a ʻo ka papahele lalo honua he pōhaku paʻa hoʻoikaika ʻia (reinforced concrete). Hoʻopau ʻia nā paia hikina a me ke komohana me nā papa kila uhi kālā e kākoʻo ana i ka papahele lele (cantilevered) a hoʻopaʻa ana i ka nānā ʻana i ka ʻaoʻao hema. ʻO ka wahi noho ma ka papahele ʻelua e wehe aku ana i kahi lānai me ka nānā ākea.

The Recognition

About the A' Design Award Keleawe

Ua lanakila ka hoʻolālā Wedge House Hale Noho i ka A' Design Award Keleawe, he ʻike hoʻohanohano nui loa i hāʻawi ʻia i nā hoʻolālā kūʻokoʻa i ʻike ʻia ma o ka hana noʻeau, ka akamai a me ka makakoho. He mau hana mākaukau a hana noʻeau kupaianaha nā lanakila Keleawe e hōʻoia ana i ka ʻike nui, ka noʻonoʻo a me ka maʻalea o kā lākou poʻe hoʻolālā. Manaʻo ʻia ʻo ka hoʻolālā Wedge House Hale Noho he mea i mahalo nui ʻia, hoʻohiwahiwa ʻia a aloha ʻia, he ʻoihana a hou loa. ʻO kēia hoʻolālā i lanakila i ka A' Design Award Keleawe e hoʻohui ana i nā hana maikaʻi loa o ka hana noʻeau, ka ʻepekema, ka hoʻolālā a me ka ʻenehana, a maikaʻi no kona nānā ʻana i nā kikoʻī. Hoʻokō maikaʻi ka hoʻolālā Wedge House Hale Noho i nā pono, hoʻopā i ka makemake, hoʻohiwahiwa i nā manaʻo a huki i ka makemake e ʻike.

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