Keiji Ashizawa's Tokyo House Blends Privacy and Openness
In the bustling heart of Tokyo, architect Keiji Ashizawa has conceived a remarkable three-story family home in the Minami-Azabu district, demonstrating a sophisticated approach to urban living. This residence stands as a testament to intelligent design, where the challenge of creating a private yet expansive environment in a densely populated area has been met with innovative solutions, including the thoughtful integration of wooden screens and lush plantings. The dwelling caters to a couple and their three children, offering a serene haven amidst the city's vibrant energy.
The strategic location of the house, nestled between a residential thoroughfare to the south and a tranquil temple ground to the north, played a pivotal role in shaping its architectural expression. To mitigate the intrusiveness of the street, the southern elevation is adorned with meticulously designed wooden louvres and vibrant greenery, effectively filtering views while permitting natural light and ventilation. Conversely, the northern facade, which overlooks the temple, features traditional sliding shoji screens, offering a gentle embrace of natural light and a connection to the peaceful surroundings, all while maintaining a respectful distance from the property line.
Ashizawa articulated the design process as an intricate puzzle, emphasizing the dual success of the project as both a structured composition and a functional living space. He highlighted how elements such as balcony louvres, terraces, a rooftop garden, and a small bedroom garden were instrumental in cultivating a sense of calm and generosity within the urban fabric. This meticulous attention to detail has resulted in a home that feels open and connected to the outdoors, despite its metropolitan context.
The internal arrangement of the house further reflects the influence of its site. Private quarters are thoughtfully situated on the lower two levels, while the uppermost floor is dedicated to an expansive, open-plan living and dining area. This configuration was a deliberate decision from the outset, allowing these communal spaces to seamlessly extend onto a spacious terrace and an open rooftop garden. This elevated placement not only affords residents a heightened sense of openness and abundant natural light but also provides panoramic views of the sky, creating a comforting separation from the immediate streetscape and neighboring structures – a crucial aspect of comfortable city living.
The selection of reinforced concrete as the primary structural material was a pragmatic choice, aligning with Tokyo's urban climate, stringent fire safety regulations, and the need for superior acoustic performance and vibration control. Its inherent strength and durability were also essential for supporting the extensive terraces and rooftop spaces, which are central to the home's design philosophy. For the southern facade's decorative and functional louvres, Ashizawa opted for ipe, a robust tropical hardwood renowned for its exceptional weather resistance. These louvres, coupled with strategically placed planting, ingeniously soften sightlines, promote air circulation, and prevent excessive heat buildup, fostering a comfortable and breathable interface between the interior and exterior environments.
A strong emphasis on integrating nature into the living experience is evident throughout the design. The entrance boasts traditional Komatsu stone paving, evoking the tranquil aesthetic of a Japanese garden. On the third floor, the dining area flows directly onto a terrace, designed to visually merge with the verdant temple gardens beyond. A spiral staircase ascends to the rooftop, adding another layer of outdoor living space. Inside, a large skylight bathes the interior in natural light, complementing a subdued color palette of natural wood and greige tones. The living area, distinguished by a stone fireplace, features sleek dark tiles on one wall, harmoniously paired with dark-hued furnishings. A bar counter, positioned between the dining and living zones, enhances the social atmosphere of the top floor, which is designed with numerous openings to maximize daylight. Ashizawa noted that the darker material choices in these areas were intentional, aiming to introduce balance and depth to the space, particularly in conjunction with the fireplace, to create a calm and grounded ambiance. He also anticipated a gradual shift in the character of the space, with tonal changes as one ascends the stairs, offering a subtly evolving experience from floor to floor.