A Mono Struct House by Masato Sekiya


Japanese architect Masato Sekiya has completed a house in Kasiwara, Japan, with a structure of wooden beams joined by bolts.

Called A Mono Struct House, the project is constructed from local timber in standard sections.

The upper storey is on three different levels and these beams extend through the exterior walls.

Photographs are by Akira Kita.

Here's a bit more information from the designer:


This house's piece of land is in the south of Nara Prefecture, in Kasiwara City. Near this city are many forests and forestry-product industries.

This factor stimulated me to grope for new possibilities. I decided to use local wood for the entire structure.

All posts and beams are 12 Å~12 cm pieces of Japanese cypress. All joints are bolts. It is a very simple system.

Every post is constructed of two 12 Å~12 cm pieces, sandwiching beams at right-angles, and stabilizing the juxtaposition with metal bolts.

This system enables floor levels to be adjusted freely, so the upper floor is divided into four different levels.

By putting the living room, kitchen-dining room, den and sofa space on different levels, punctuation by wall became unnecessary and a flow of light and air brings spaciousness to what could conventionally have become a limited space.

On one side, three levels of floor beams extend through to become visible construction on the exterior and create overhang forms, for a unique exterior view.

See also:


House for Three Children
by Masato Sekiya
House K by
Yoshichika Takagi
More interior stories
on Dezeen

Posted on Sunday June 6th 2010 at 8:45 pm by Catherine Warmann. Copyright policy | Comments policy

  • Thoas

    Yippee – this looks much more like japanese vernacular built from standardised timbers – especially as it is grown locally (enough of the dated, deeply unsustainable concrete monoliths – move on ando followers). Looks like a warm and tactile environment (unlike the concrete).

  • Amazing – after Japan’s first fully certified passive house ( http://bit.ly/b4dUsR ) built last year, the housing projects on the island seem to go into a practicable, yet traditional direction… keep an eye on Sekiya-san!

  • michael

    is he working for forest industry? i would like to know the architectural CONCEPT.

  • Obscurity

    It’s not anyone’s business to what extent an architect and his client enjoy the freedom of expression in designing the space and putting available and affordable resources to their own use. But if I am allowed to repeat, I believe it’s architect’s business to mind safety of the residents in the house, especially around the staircase.

  • sullka

    It reminds me Peter Eisemann, a “livable” Peter Eisenmann house that is.