Jonoya by Masakazu Tsujibayashi Is Anything But Ordinary

ByMyProperty Life 22/04/2026

All architecture is a dance between the public and the private. The things we choose to show, and the things we keep to ourselves – usually quite telling. Among the small streets of Osaka, things that happen on street level are usually of the public’s interest, and therefore the public’s business. Jonoya by Masakazu Tsujibayashi creates a rich inner world, one that stays relatively hidden, an oasis among the dense urban sprawl.

A narrow street lined with residential buildings, bicycles, and overhead wires, with a modern house and high-rise buildings visible in the background.

Inside, interiors are bathed in warm wood, an ode to the natural undulations and growth patterns divined by nature. Large skylights add a beautiful brilliance to the wood, catching the confluence of chatoyance and sun. Wood slat floors retain a sense of loftiness to the top floors, a treehouse that somehow exists within the trunk.

Modern wooden interior featuring natural wood walls, a slatted floor, a desk with a plant, and a desk lamp near a window with soft natural light.

A view through a wooden-framed doorway into a minimalist white room with a desk, chair, shelving unit, and organized storage boxes on the right.

Interior space with wooden walls and ceiling, a skylight, a metal slatted floor, a white railing, and a window letting in natural light. A plant and a folded ladder are visible in the corner.

Corners that would otherwise be quite unapproachable become places of visual interest – windows are situated close to the floor, with a generous skylight directly above. A curious and delightful upending of traditional placement carries throughout the house, providing more instances for a changing of perspective throughout the everyday. This philosophy could carry far past the built environment, to introduce new ways of thinking to far corners of the mind. Storage is plentiful on the top floors, offering a density of knowledge and reflection, a library of life.

Modern interior with wooden walls and shelves, a staircase in the center, potted plants, framed artwork, and a large bookshelf filled with books.

Modern office interior with wood paneling, a built-in desk, a desk lamp, bookshelves, and a potted plant. Natural light comes through an opening in the ceiling.

A modern interior showing a white staircase with a wooden handrail, surrounded by wooden and concrete elements, with natural light and green plants at the base.

This grand staircase is the axis on which Jonoya House turns – bathed in light, and accented by an almost completely mirrored wall, the staircase echoes the simplicity and clear craftsmanship that extends throughout the project. Joinery is visible and celebrated, a nod to the ancient technologies that have allowed brilliant architecture to take place.

Interior view of a modern building featuring exposed wooden beams, a partial staircase with a white railing, and natural light filtering through slatted ceiling panels.

Modern interior with light wood beams, a central wood column, white staircase, and a dark wall with a small lit room visible in the background.

Modern interior with wooden floors and walls, a dining table with chairs, a staircase with white railing, and a potted plant beneath the stairs. Natural light enters through windows.

A minimalist living room with wood paneling, a built-in bench, a TV on a shelf, a window with bamboo blinds, and a chair near a small table with flowers.

Generous curvatures keep the interiors warm and approachable among more technical design language. A long table signals an invitation to host, an easy eventuality when there’s room for all.

Modern dining area with a large wooden table, mixed chairs, wooden flooring, and open shelving, connected to a living space with natural light and contemporary decor.

Modern house with dark siding and wooden accents on a quiet urban street, with several potted plants along the entrance and sidewalk.

The simple facade belies the depth of interiority underneath, light and privacy two central tenets of the design. No window at waist height, and many corners below a traditional right angle, Jonoya House offers a novel space to create and work, but mosy importantly, relax and live.

A modern, angular house with a gray sloped roof sits at a street corner beside a wooden utility pole with overhead wires in an urban neighborhood.

To learn more about Jonoya House and the work of Masakazu Tsujibayashi, visit instagram.com.

Photography by Yosuke Ohtake.

Growing up in NYC has given Aria a unique perspective into art + design, constantly striving for new projects to get immersed in. An avid baker, crocheter, and pasta maker, handwork and personal touch is central to what she loves about the built environment. Outside of the city, she enjoys hiking, biking, and learning about space.