Ukei Shimada Wraps His Own Suginami House in Chain-Operated Shitomido Shutters and a Green Tile Courtyard

Suginami Ward is the kind of Tokyo neighborhood where houses continue block after block, each one a close cousin of the next. For his own home on an empty lot there, Ukei Shimada Architects did not try to outshout the street. Ukigumo, or Floating Clouds Residence, is a modest 112 m² house completed in 2025. Its ambition is about depth, not size. Shimada read the surrounding fabric as flat, orderly and shallow, and he looked up for a counter-model: the layered clouds visible in the slice of sky above the site.

What makes the house worth your attention is how literally and how quietly that idea gets built. The cloud is not a form or a gesture on the roof. It becomes a method: volumes of different scale and contrast that the architect describes as shifting rather than fixed, each setting up a different relationship with the city. At street level the method meets an old Japanese device, the shitomido hinged shutter, which lets the facade read as a closed timber wall one hour and an open, lit library the next.

A Facade That Changes Its Mind

The timber-clad street elevation carries windows at regular intervals, and each window has a shitomido. Closed, the shutters lie flush with the cladding and the house reads as a nearly solid box over a concrete plinth, with only narrow dark slots showing. Open, they hinge outward and up and are held by a chain, becoming small awnings that shade the glass and pull the street into the rooms.

We like that the control is so direct. There is no motor and no sensor, only a chain you adjust by hand to set the level of exposure, light and airflow. That puts the house's relationship to its neighbors in the occupant's hands every day, which is a more honest answer to urban privacy than a permanent frosted pane.

Behind the ground-floor glazing sit bookshelves, and the concrete plinth doubles as a ledge you can sit on. It is a generous move for a private house. The edge where the family meets the sidewalk is given over to books and a bench rather than a blank fence, and the pine and gravel garden by Weru Landscape keeps a polite distance between the two.

A Lantern at Dusk

After dark the reading reverses. The red-brown boards drop back into shadow and the ground-floor openings glow, so the shutters frame lit shelves like a row of shop windows. On a street of similar houses, this is how Ukigumo earns its difference: through the rhythm of light and the angle of its propped timber lids, not through height or a sculpted roofline.

Up close, the detail is restrained. A ground spotlight in the gravel, a pine branch crossing the opening, and the shelving lit from within are enough. The shutter brings in a degree of theatre, but the staging stays small and domestic.

Color as Threshold

Inside, Shimada uses color to mark passage. A corridor stained deep blue opens onto bright plywood rooms. Where glazed blue tile and dark blue floorboards meet pale timber, the change in material does the job a door frame would normally do. You know you have moved from circulation into a room without being told.

The narrow timber stair takes this idea vertical. It climbs toward a tall window full of sky, so the route to the main living floor is literally aimed at the clouds that started the project.

Bedrooms Close to the Ground

The ground floor holds two bedrooms, finished in plywood with exposed ceiling beams. They are plain rooms. A small square window filled with foliage sits behind a bed, and a corner opening looks onto a shrub. The deep blue closet carries the corridor color into the room, a small touch that ties the private zone together.

Putting the bedrooms down here, next to the garden and behind the shutters, is a reasonable inversion for a dense lot. Sleep gets shade and planting. The social life of the house moves upstairs, where the light is.

Living Under a Curved Ceiling

The living, dining and kitchen space sits on the upper floor under a curving white plaster ceiling. This is where the cloud idea comes closest to being a shape, and it works because the curve is soft and continuous rather than showy. Sun falls in diagonal bands across the oak floor and the curved wall, so the room changes with the time of day.

A green glazed tile volume pushes into the open plan, and a concrete island anchors the kitchen. A timber screen and sliding glass doors frame the tiled courtyard wall, so the main room never ends at a plain surface. You always see the next layer.

At dusk the timber clerestory wall and the dark green tile take over, and the white ceiling holds the last of the blue light. The palette is narrow, but the pieces are chosen so each one reads clearly under changing light.

The Tatami Room as a Pocket of Calm

Next to the open living space sits a tatami room with grey plaster walls, a bamboo and reed ceiling, and a small rounded shoji window. Next to the bright main room it is dim and inward, close to the opposite in mood. A thin slit of light at the door and a framed seascape do most of the decorating.

This is the clearest example of Shimada's "volumes of varying scale and contrast." The tatami room is not just a separate function. It is a different atmosphere, and one sliding glass door away the green courtyard tile shows up again to stitch it back to the rest of the floor.

A Courtyard Wrapped in Green Tile

The courtyard deck is the heart of the upper floor. Its walls are clad in glossy green tile, which reflects sky and catches light that a plain render would absorb. A floor skylight drops daylight to the level below, and a built-in cushioned bench gives the children a reading spot that feels outdoors and sheltered at the same time.

The court also serves the bathroom, where a pivoting window opens the tub and rain shower onto the green tile. A dining table on the deck sits against corrugated metal cladding, one of the few moments where the house admits a tougher material. Together these views show how one small open-air void does the work of a garden, a dining room and a light well in a house with no room to spare.

Plans and Drawings

The site plan puts the house in perspective: one small black footprint among a dense field of roofs and narrow streets. The ground floor plan runs an entrance hall along the south side, with two bedrooms, closets and a planted garden that includes a weeping podocarpus.

Upstairs, the open living, dining and kitchen space sits beside the tatami room, balcony, bathroom and pantry. The section shows the sloping roof lifting over the upper living space, with the bedrooms and entrance hall tucked beneath. Structural engineering was by Ladderup Architects, MEP and HVAC by ZO Consulting Engineers, and construction by Miyashima Koumuten Co., Ltd.

Why This Project Matters

Tokyo's residential suburbs are full of small houses fighting for attention, and many of them fight with object-making. Ukigumo takes a more useful route. It treats depth and variability as the real luxury on a tight lot, and it gets there through layering: shutter, glass, shelf; corridor, threshold, room; living space, tile court, sky. In 112 m², that layering feels larger than any single bold form would.

The shitomido is the lesson to take away. A traditional, hand-operated shutter on a chain gives the occupant fine control over privacy, light and air, and it turns the facade into something the household performs every day. For architects working on dense urban infill, Shimada's own house is a strong argument that the most expressive facade may be the one that can open and close.

Ukigumo - Floating Clouds Residence by Ukei Shimada Architects. Location: Suginami Ward, Tokyo, Japan. Area: 112 m². Year: 2025. Photography: Koji Fujii / TOREAL.

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