Naoko Horibe of Osaka studio Horibe Associates says she designed the house to "combine two completely opposing concepts in a single structure, without a sense of clashing."
"One was an exterior like a sports car; the second was a natural interior featuring wood," she said.
A cloak of galvanised metal folds over the sides and roof of the structure, forming an asymmetric shape with a streamlined appearance.
This layer of cladding overhangs both the front and rear of the building, creating a sheltered entrance and shading the house's windows.
The interior centres around a combined living and dining area, which leads directly into every other room and removes the need for corridors.
Timber roof joists are left exposed across the ceilings, plus the pitch of the roof creates a pair of triangular windows along the upper sections of the walls.
The angled roof also allows space for a small loft, which the architect describes as a "special den" for the family's husband.
A bedroom and traditional Japanese room run along one side of the house and are slightly elevated to create storage spaces underneath.
Photography is by Kaori Ichikawa.
Key to diagrams:
3.Living, dining and kitchen
- Rio de Moinhos Open-Air Theatre by Ateli…ermob
- Nunnmps by Cheungvogl
- Kindergarten in Rosales del Canal by Mag…én Arquitectos
- Dezeen's 10 biggest architecture and des…ign stories of 2014
- House extension with stepping stones lea…ding inside by Haberstroh Schneider Architekten
- Castell d’Emporda by Concrete
- Nurai by Dror
- Your Wall House by FAR frohn&rojas
- Capital Hill Residence by Zaha Hadid Arc…hitects
Sign up for a daily roundup
of all our stories