kazuya morita architecture studio: pentagonal house
kazuya morita architecture studio: pentagonal house kazuya morita architecture studio: pentagonal house
dec 06, 2010

kazuya morita architecture studio: pentagonal house

‘pentagonal house’ by kazuya morita architecture studio in tsushima city, japan all images courtesy kazuya morita architecture studio photographer: shinichi watanabe

‘pentagonal house’, also known as ‘t-house’, is a private dwelling by kyoto-based practice kazuya morita architecture studio in tsushima city, a calm village near nagoya, japan. true to its name, the single-storey structure has a plan in the shape of a distorted pentagon. treating the roof form as a secondary landscape within the site, the project divides the dwelling into radially spreading spaces.

the clients were a young couple who wished to build a separate house in the same lot as an old japanese style house where their parents reside. the pentagonal geometry was derived from the shape of the site, allowing for maximum built area while still providing adequate garden space around its perimeter.

japanese style room

the interior features five main structural walls set outwards from the center. a dome-shaped cut out from this epicenter defines the minimal circulation of the house, providing views and access into every room. a dining table in the shape of the roof plan is set here. each of the five faces of the house is dedicated to one space, illuminating the room with a generous span of glazing.

(left) center point / dining area (right) entrance

despite the unconventional shape of the plan, the house utilizes simple and traditional wooden construction methods; the structural walls feature round corners done in japanese white plaster.

living space

looking into the living space and bedroom

(left) view from the entrace (right) shelving detail (left) bedroom (right) washroom

exterior at night

aerial view




site plan

(above) section (bottom left) west elevation (bottom right) south elevation

project info:

program: private housing structure: wood site area: 692.63 m2 built area: 87.73 m2 structure engineer: mitsuda structural consultants construction: hatanokoumuten co. ltd.

  • Very Nice House….Loved the pentagonal table, which is the main idea of the house. Any trouble with the sharp angles inside?

    El Trooper says:
  • I love the idea of turning the ceiling into a kind of landscape canvas for decorative design. Inspirational.

    jarcher says:
  • Nice idea, but why not in same consequence in bedroom? Why a white flat ceiling?
    I don’t see any need of that…

    ceiling? says:
  • What a great house! I love it!

    Ceiling: What isn’t shown here is that there is a small second level for storage above the bedroom and bathroom. You can sort of see from the section. That is those two rooms have a flat ceiling.

    Kenchikuka says:

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