Charred timber clads walls of Okazaki House by MDS

Charred cedar clads the walls of this house in Aichi, Japan, by architecture studio MDS, while exposed wooden beams create a rack-like effect on the underside of the diagonally slanted roof.

Okazaki House by MDS Co. Ltd

Like many houses owned by young families in Japan, Okazaki House was built on the same site as the residence of the client’s parents.

Okazaki House by MDS Co. Ltd

Tokyo-based studio MDS used a traditional charring technique known as Yakisugi to blacken the cedar planks used for the building’s exterior, helping to protect the building from decay.

Okazaki House by MDS Co. Ltd

The site naturally slopes down from one side to the other, so the architects created a single-storey dwelling containing a series of tiered levels.

Okazaki House by MDS Co. Ltd

An entrance leads into the house at the uppermost level, where the living room is located. The floor then steps down to create a dining room in the middle and a kitchen at the lowest level.

Okazaki House by MDS Co. Ltd

“This enables people to maintain the same level of eyesight, and retains an exquisite sense of distance,” said the architects, explaining how they wanted to maintain an open-plan atmosphere.

Okazaki House by MDS Co. Ltd

Pendant lamps hang down from between the ceiling beams to illuminate worktops and seating areas, while a piece of built-in furniture provides shelving and a desk.

Okazaki House by MDS Co. Ltd

A small courtyard with a tree at its centre cuts into the volume of the building, separating living spaces from the master bedroom.

Okazaki House by MDS Co. Ltd

A second bedroom and bathroom are tucked away on one side and residents have to step down again to access them.

Okazaki House by MDS Co. Ltd

Polished oak floorboards run throughout the house, while latticed wooden screens can be used to partition spaces when required.

Okazaki House by MDS Co. Ltd

Photography is by Forward Stroke Inc.

Here’s a project description from the architects:


Okazaki House

The generation gap has become a problem in Japan in recent years. There are an increasing number of two-family homes, as well as houses built on the lots of parents’ houses. This house is one of the latter. Although the residents are parents and child, solicitude should be expressed with this not-so-large site.

Okazaki House by MDS Co. Ltd

This house is a one-storey building with a shed roof, which lowers the roof height on the side of the parents’ house, resulting in wide views maintained with open sky from the parents’ house.

For the interior space, the shape of the large shed roof is directly exposed, and two angled walls (canted walls) are placed in this open-space. This simple design creates various interior spaces in both plan and cross-section. The floor levels of the rooms are decided based on the ground height around the building, and are planned to utilise the height differences.

Ground floor plan of Okazaki House by MDS Co. Ltd
Ground floor plan – click for larger image

The site is sloped from north to south, and the west side, where the parents’ house stands, is lower. The main bedroom is located at the highest part of the site, the north-east side; across from a central courtyard, the level gradually slopes towards the south, from the living room, to the dining room and to the kitchen. This enables people to maintain the same level of eyesight, and retains an exquisite sense of distance.

Roof plan of Okazaki House by MDS Co. Ltd
Roof plan – click for larger image

For the framework of the roof, standard cedar lumber of 120x120mm, which is commonly sold on the market, is used. Instead of using custom sizes or laminated wood, the lumber is alternately laid over the beams within the maximum standard length of 6m, and is crisscrossed at the upper part of the canted walls that roughly divide the interior. This creates an impressive ceiling surface as well as functioning as the roof framework.

Section of Okazaki House by MDS Co. Ltd
Section – click for larger image

Company name: MDS Co.Ltd
Architecture: Kiyotoshi Mori & Natsuko Kawamura / MDS
Location: Okazaki-City, Aichi
Principal Use: residence

Structure: wood
Site Area: 213.74 sqm
Total Floor Area: 98.17 sqm /1F
Exterior finish: yakisugi / cedar forms exposed concrete
Roof: galvanised colour steel sheet standing-seam roofing
Floor: oak flooring
Wall: plasterer
Ceiling: oregon pine of 120 x 120 mm

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Shirokane House by MDS concealed behind windowless concrete facade

A doorway is the only opening in the faceted concrete facade of this family residence in Tokyo by architecture studio MDS.

Shirokane House by MDS

Kiyotoshi Mori and Natsuko Kawamura of Tokyo-based MDS wanted Shirokane House to make the most of its small site, so they designed a three-storey volume that angles outwards and upwards to create extra space and bring in more light.

Shirokane House by MDS

“There are basic requirements for a house, where people live, such as privacy protection and ample daylight and ventilation,” they said. “It, however, takes a little ingenuity to satisfy such requirements under a given condition that a site is surrounded by the neighbouring buildings.”

Shirokane House by MDS

Residents enter the house on the middle floor, and are led through to a double-height kitchen and dining room that receives natural light through a pair of high level windows.

Shirokane House by MDS

One of the windows fronts a living room on the storey above, while the other sits in front of a small roof terrace.

Shirokane House by MDS

A lightweight steel and timber staircase leads up to this top floor. Upon arriving in the living room, a steeply angled ceiling is revealed, as well as a corner window with a pointed tip.

Shirokane House by MDS

Concrete walls are left exposed inside the house as well as outside, and are textured by horizontal markings that reveal the original timber formwork. Floors are finished in walnut.

Shirokane House by MDS

A set of wall-mounted rungs form a ladder leading up to a second terrace on the roof, while bedrooms and bathrooms are located on the lowest floor.

Shirokane House by MDS

Photography is by Forward Stroke inc.

Here’s a project description from MDS:


Shirokane House

The small site is located in a typical Tokyo urban residential area, where houses are closely built up. A pursuit of internal spaces in this house, as a result, changes the Tokyo cityscape a little.

Shirokane House by MDS

An area for one floor is usually desired as large as possible, in particular, in such a narrow site. For this house, the first floor area is small due to the parking space and the second floor is, instead, larger. The outer appearance is examined based on ceiling height, slant line regulations for a building shape.

Shirokane House by MDS

There are basic requirements for a house, where people live, such as privacy protection and ample daylight and ventilation. It, however, takes a little ingenuity to satisfy such requirements under a given condition that a site is surrounded by the neighbouring buildings. For the site, the southern site across the road is “tentatively” a parking space and no one can tell what will happen in the future. The daylight is, therefore, taken in from the above as much as possible and it is brought downstairs.

Shirokane House by MDS

The living room is on the top floor. The roof terrace facing the blow-by above the living room and the terrace connected with the living room take daylight and air in the house and the light falls on the dining and kitchen room downstairs. The irregular shape at the corner of the site allows the house continuously to keep privacy as well as daylight and ventilation.

Shirokane House by MDS
Floor plans – click for larger image

The building looks quiet only with the entrance on the south facade, it embraces expressive internal spaces where light and shadow change by the minute.

Shirokane House by MDS
Cross sections

Architecture: Kiyotoshi Mori & Natsuko Kawamura / MDS
Location: Minato-ku, Tokyo
Principal Use: Residence
Structure: RC
Site Area: 64.49 sqm
Total Floor Area: 101.63 sqm

Exterior Finish: cedar forms exposed concrete
Roof: exposed concrete
Floor: walnut flooring
Wall: plaster/cedar forms exposed concrete
Ceiling: acrylic emulsion paint + plaster board

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Yatsugatake Villa by MDS

Japanese studio MDS has completed a countryside retreat with south-facing rooms in the foothills of the Yatsugatake mountains (+ slideshow).

Yatsugatake Villa by MDS

Named Yatsugatake Villa, the house has a fan-shaped plan that gives large windows and openings to the walls of the living room, dining room and first-floor bedroom.

Yatsugatake Villa by MDS

“The fan-shaped design – opening to the south – means plenty of sun streams in during the cold winters: no matter the time of day there’s always a place to bask in the sun,” said architects Kiyotoshi Mori and Natsuko Kawamura.

Yatsugatake Villa by MDS

Two narrow terraces line the edge of this southern facade and are partially sheltered beneath the overhanging lip of the roof.

Yatsugatake Villa by MDS

Smaller windows are positioned across the north elevation so that residents can benefit from cross-ventilation.

Yatsugatake Villa by MDS

Inside the house, wooden ceiling beams are left exposed, while doorways with softly curved edges lead between rooms.

Yatsugatake Villa by MDS

A wooden staircase extends up through the centre of the house to connect rooms on the ground floor with a combined bedroom and study room on the first floor.

Yatsugatake Villa by MDS

Other Japanese houses we’ve featured recently include a concrete home with a glazed stairwell and a residence with a secluded balcony.

Yatsugatake Villa by MDS

See more houses in Japan »

Yatsugatake Villa by MDS

Photography is by Toshiyuki Yano.

Yatsugatake Villa by MDS

Above: ground floor plan

Yatsugatake Villa by MDS

Above: first floor plan

Yatsugatake Villa by MDS

Above: section a-a

Yatsugatake Villa by MDS

Above: section b-b

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by MDS
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