Jonoya

Osaka, Japan

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Jonoya

Osaka, Japan

Firm

Masakazu Tsujibayashi Architects

Type

Residential › Private House

STATUS

Built

YEAR

2025

SIZE

1000 sqft - 3000 sqft

Photos

Yosuke Ohtake (20)

This house is the architect’s own residence.
My family and I are all very independent in our daily lives. Each of us has our own hobbies, and they rarely overlap—guitar sounds may echo from one room while a movie plays in another. Some days we talk a lot, and other days we barely speak. Our belongings are diverse and numerous—books, toys, plants, instruments, ceramics—acquired without any unified theme. Yet despite their inconsistency, they coexist loosely and comfortably, creating an atmosphere that feels naturally harmonious.
The house is located in a neighbourhood where streets of varying widths—formal roads, informal paths and narrow alleys—intersect. Although close to the city centre and surrounded by cultural facilities such as museums and theatres, the area retains a shitamachi-like character. Traffic is light, but many people pass through, and because most houses are built right up to the property line, daily interactions between residents naturally occur along the street. The neighbourhood has a rapid cycle of renewal, with old row houses, new residences, shops and shrines forming a distinctive and diverse urban landscape. I felt an affinity with this place—perhaps because its loose mixture of elements resembles our own way of living—and I wanted to create a home that would gently blend into it.
But what does it mean for a house to “blend in”?
It involves naturalness, time, subjectivity and objectivity—elements that are essential yet difficult to define. In a city where public and private realms overlap, the idea becomes even more complex. Still, it is fundamental to how people relate to their environment. I therefore aimed to design a house that could continuously build relationships with both its inhabitants and the city, responding to the subtle fluctuations of daily life.
Given the irregular site bordered by roads on three sides, the building is placed close to the boundaries to secure the required floor area. This proximity to the street made it necessary to carefully calibrate the relationship between public and private. I adopted scales that connect the house to the street while remaining comfortable for people, along with natural materials that will develop character over time—allowing the passage of time itself to take form in the architecture and supporting a relationship in which the house, the city and people do not create a sense of pressure on one another. Openings were positioned and sized according to the conditions of each street edge, enabling the house to relate to its surroundings without creating a sense of pressure, while still maintaining privacy and letting traces of daily life gently filter outward.
Building on this foundation, the elements were arranged intuitively through a dialogue with the environment and people. This allowed the project to evolve day by day; rather than restarting, each adjustment was made while keeping the traces of earlier revisions visible. As a result, a series of contrasting elements—such as large windows and the overhanging walls that conceal them, robust concrete walls paired with welcoming benches, and alternating transparent and opaque railings—appear throughout the interior and exterior. These contrasts interact across the house, forming a balanced spatial rhythm that reflects the ongoing negotiation between openness and enclosure.
This diversity extends to the interior. Ceiling heights, floor levels and spatial scales shift gradually, forming a sequence of loosely connected zones. By embracing ambivalent feelings—wanting connection yet also separation—the design naturally unfolded into a variety of spaces. Carefully selected materials and details provide a subtle tension while acting as anchors throughout the space. The elements do not dominate; instead, they reveal their inherent qualities and engage with one another in a lively, conversational way.
Ultimately, a house can only blend into its surroundings through ongoing engagement. By allowing people to choose their relationship with the space according to the changing rhythms of daily life, the home can gradually become part of the neighbourhood over time.

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Jonoya

Osaka, Japan

Jonoya

Osaka, Japan

Product Spec Sheet

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