Japanese studio Mattch has completed a family house in Nagoya with a sweeping facade that stretches out towards the corner of its plot (+ slideshow).

While the rear and side walls of House H are straight, Mattch designed the roof of the building as an irregular gable that curves up then down as it runs along the length of the building.

"I let the form of the ceiling curve gently to diffuse the light that enters through the slit-shaped top light on the north side of the ridge," said architect Ryuji Takenaka.

The curved elevation frames the outline of a patio at the entrance, while a row of timber rods screens a sheltered deck that could be used for storing bins or bicycles.

Glass walls slide back to connect the patio with the interior, where a kitchen, living room and dining room occupy one double-height space at the front of the building.

A traditional Japanese room filled with Tatami mats is also located in this space but can be partitioned off when necessary behind folding translucent screens.

A mezzanine floor is positioned above the bedroom and bathrooms to provide a multi-purpose room at the rear of the home.

The owner of the residence works for a paint company, so the interior was decorated using white paint he supplied. "[He] wanted to make a showroom for visitors," explained Takenaka.

Wooden flooring runs through each room, while exposed wooden columns provide extra support for the concealed steel framework.

House H is one of many projects we've published that are named after letters of the alphabet and you can see more by catching up with our A-Zdvent calendar, which is counting down one house every day until Christmas.

Other Japanese homes we've featured recently include one that generates all its own energy and heating.

See more houses in Japan »

Photography is by Nacasa & Partners.

Above: ground floor plan - click above for larger image

Above: first floor plan - click above for larger image