Arc V Teach by Seiji Takahashi is a highly esteemed winner of the very prestigious 2026 Duais Cré-umha A' Design Award in Dearadh Ailtireachta, Foirgníochta agus Struchtúir Competition Category.

Cré-umhaAiltireacht· 2026

Arc V Teach

by Seiji Takahashi

Client: Kiryu Atelier＆T Architects

Duais Cré-umha A' Design Award Winner in Ailtireacht Category

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The Design

About Arc V Teach

Is teach é Arc V a dearadh do dhá ghlúin d'aon teaghlach amháin ag bun cnoic ar a bhfuil tuamaí adhlactha ársa agus fothracha caisleáin. Cruthaítear an áit chónaithe le dhá imleabhar bhána neamhspleácha atá leagtha amach go siméadrach i gcruth V. Díríonn an gheoiméadracht an radharc i dtreo an chnoic stairiúil. Feidhmíonn folús lárnach idir an dá imleabhar mar chlós agus mar bhealach isteach comhroinnte, rud a thugann príobháideachas do gach teaghlach agus a choinníonn nasc amhairc eatarthu ag an am céanna. Léiríonn miotal dubh agus coincréit nochta an bealach isteach. Nascann seomra teaghlaigh comhroinnte an dá sciathán le chéile.

The Recognition

About the Duais Cré-umha A' Design Award

Bhuaigh an dearadh Arc V Teach Duais Cré-umha A' Design Award, aitheantas an-ghradamach a bhronntar ar dhearaí sármhaithe a mbíonn cruthaitheacht, aireagacht agus géarchúis mar shaintréithe acu. Is déantúsáin ghlic agus chruthaitheacha go suntasach iad buaiteoirí Cré-umha a dhearbhaíonn taithí fhairsing, samhlaíocht agus acmhainneacht a ndearthóirí. Táthar ag súil go mbeidh an dearadh Arc V Teach ina rud a bhfuil an-mheas air, a n-ardaítear agus a ghráitear, atá thar a bheith gairmiúil agus nuálach. Ionchorpraíonn an dearadh seo a bhuaigh Duais Cré-umha A' Design Award na cleachtais is fearr san ealaín, san eolaíocht, sa dearadh agus sa teicneolaíocht, agus tá sé sármhaith as a aird ar mhionsonraí. Sásaíonn an dearadh Arc V Teach riachtanais go hálainn, bainíonn sé le mianta, cuireann sé draíocht ar mhothúcháin agus tarraingíonn sé fiosracht.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: The design features two independent units for the parent and child generations, arranged in a symmetrical V-shaped configuration. This layout directs the perspective vanishing point toward the historical hill in the background. The central void between the two units functions as a courtyard and approach, reconciling the opposing requirements of individual privacy and shared familial presence within a multi-generational home.
Dimensions & Packaging: Site area　785.45m2
gross building area　493.49m2
covered area　369.9m2
Tags: Architecture, two-family residence,modern architecture, concrete
Production Technology: Materiality plays a crucial role in defining the narrative of "thresholds". At the approach, black metal and exposed concrete walls reminiscent of castle gates create a psychological boundary between public and private realms. In contrast, the white volumes of the living spaces symbolize the lightness of modern life. These volumes appear to "float" above the weight of history, embodying a vivid contrast between the past and the present.
Design Challenge: The primary architectural challenge was to reconcile the site’s inherent historical weight with the conflicting requirements of a multi-generational program: the necessity for individual privacy and the desire for a shared familial presence. This was resolved through a V-shaped configuration that generates a "central void." Functioning as both a courtyard and a communal approach, this interstitial space provides spatial autonomy for each household while maintaining a mediated connection between the two generations.

At the structural vertex where the wings converge, a shared family room serves as a critical generational intersection, embodying the narrative of familial continuity. While each household maintains independent living quarters accessed via separate entrances from the shared courtyard, this central node functions as the primary interface for communal activity and guest reception. The resulting hybrid indoor-outdoor buffer zone allows for versatile programming including use as a social space or a home office without compromising the privacy of the individual residential units.
Research: The architectural process began with an investigation into the history of the city and the surrounding site. This research was conducted because the interaction between a building and its environment is of primary importance. Approximately 1600 years ago, this location was a sacred area where burial mounds known as Kofun were built for kings. Many burial mounds are preserved on the hill situated at the back of the project site. The memory of people selecting and protecting this land as a special place remains present in the topography. The name Torideyama originates from a fort that once existed here for samurai to protect the town. This area is also linked to Tokugawa Ieyasu, the leader who unified the nation 500 years ago. The strong martial culture of Nishio Castle created the framework of this city. This architecture was designed to honor the deep history of the land.
Inspiration: This two-family residence stands at the foot of a hill rich with multi-layered historical strata, where 1,600-year-old ancient burial mounds and 500-year-old warring-states castle ruins rest. The V-shaped configuration directs the perspective toward the sacred hills behind while harmonizing the conflicting needs of privacy and family connection, thus completing a narrative of familial continuity.
Project Duration: The project began in July 2023 in a regional city in Aichi Prefecture, Japan, and was completed in December 2025.
Operation Flow: The Arc V House is a residence for two families located at the base of a hill containing 1600 year old burial mounds and 500 year old castle ruins. Residents approach the home through a gate made of black metal and concrete that establishes a boundary between the public street and the private interior. Upon entering, inhabitants move through a central courtyard that serves as a shared approach for both households. The house is divided into two symmetrical white volumes arranged in a V shape to provide privacy for the parent and child generations while maintaining a visual connection across the void. At the center where these two wings meet, the families interact in a shared family room that functions as a common space. Inside their individual wings, family members use separate living and dining areas on the first floor. On the second floor, the parent generation utilizes a tatami room and a study, while the child generation occupies a separate wing with bedrooms and an additional study area. Large openings in the architecture direct the view of the inhabitants toward the historical landscape of the hill. During the evening, residents experience the house as a source of light that illuminates the hillside, creating a visual link between the modern household and the history of the site.