高台の坂下に位置するこの敷地は、都内に見られるごく日常的な住宅街の一角で、三方を住宅に囲まれている。北側道路に面し、南へ向かって細く絞られる変形敷地である。斜面麓の微地形は、季節ごとに変化する風や光に緩やかな流れを与えていた。その小さな環境の特性を丁寧に掬い上げ、建築によって顕在化し、増幅することを、この計画の手掛かりとした。

この住宅で目指したのは、日常で繰り返される移動の中に「一服」の時間を織り込むことである。

計画は、西側境界に一枚の壁を建て、矩形の居住空間を東側へ寄せ、その間に小さな峡谷のような楔形の中間領域を設えた。この領域は変形敷地を受け止める調整帯であると同時に、街路から最上階までをつなぐ住まいの環境軸となっている。

一枚の壁は朝の光を柔らかく反射・拡散し、地域を流れる風を整えながら中間領域へ導く。竹の葉影や葉擦れの音、空や光の移ろいもここへ重ねられ、それらは居住空間へ届けられる。外装には角波鋼板のスパンドレルを採用した。繊細な凹凸が光を受け、時間や天候によって静かに表情を変えるシルキーな質感が、建築に環境の変化を映し出している。

登山で沢筋を歩くとき、人は地形に導かれ、やがて尾根や山頂で視界が大きく開ける。景色が変わる方向へ、人は足を向ける。その身体感覚をこの住まいにも重ね、環境の流れに人の動きを重ねる空間構成とした。

街路から玄関ポーチを抜けると、谷底のような静けさをもつ中間領域が迎える。玄関ホールからスケルトン階段、中庭、奥の客間へと空間は連続し、光や風は住まいの奥へ届いていく。

竹林を眺めながらスケルトン階段を折り返して二階へ至ると、吹抜けから南テラスまで水平に広がる中間領域が現れ、リビング・ダイニングはその広がりと一体となる。トップライトが差す水回りもこの領域に沿い、光と風が暮らしの中心を満たしていく。

さらに竹林を見下ろしながら三階へ上がると、吹抜けと北テラスを介して空へと開かれ、最も開放的な空間となる。

一階最南端の客間から見上げると、中庭、スケルトン階段、三階テラスが雛壇状に積層し、一つの風景が立ち現れる。住まいの中を移動するたびに、光や風、空の表情は少しずつ移ろい、その変化が知覚を刺激し、呼吸や心のリズムを整えていく。

日常で繰り返される移動そのものを「一服」の時間へと変えていくこと。環境を整え、その流れに人の動きを重ねながら、時間の質そのものを設えること。それが、この住宅で目指した空間である。

Located at the foot of a hillside in a typical Tokyo residential neighborhood, the site is surrounded by houses on three sides. Facing a road to the north and tapering toward the south, it forms an irregular wedge-shaped plot. The subtle topography at the base of the slope gently guides seasonal breezes and the movement of light. Rather than imposing a new order onto the site, the design began by carefully identifying these latent environmental qualities and revealing and amplifying them through architecture.

The aim of the project was to weave moments of ippuku?a quiet pause for the mind?into the everyday routines of moving through the house.

The design began with a single freestanding wall placed along the western boundary. The rectangular living volume was positioned to the east, creating a wedge-shaped intermediate space between them, reminiscent of a small canyon. This space not only resolves the irregular geometry of the site but also forms the environmental spine of the house, connecting the street to the uppermost floor.

The wall softly reflects and diffuses the morning light while moderating the local breeze and guiding it into the intermediate space. The shifting shadows of bamboo leaves, the sound of rustling foliage, and the changing sky and daylight are gathered here before gently extending into the living spaces. Corrugated steel cladding was selected for the exterior; its finely textured surface subtly captures changing light and weather, allowing the building itself to register the passage of time.

When walking through a mountain valley, people instinctively follow the terrain until the landscape suddenly opens toward a ridge or summit. We naturally move toward places where the scenery changes. This bodily experience became the spatial principle of the project, where the flow of the environment is layered with the movement of daily life.

Passing through the entrance porch from the street, visitors arrive in an intermediate space with the quiet atmosphere of a canyon floor. From the entrance hall, the sequence continues through the open-riser stair, the bamboo courtyard, and toward the guest room at the far end, allowing light and breeze to penetrate deep into the house.

Ascending the open-riser stair while looking toward the bamboo courtyard, the second floor unfolds horizontally from the atrium to the south terrace, where the living and dining area becomes one continuous space with the intermediate zone. The bathroom, illuminated from above by a skylight, also borders this space, allowing light and air to gently fill the heart of everyday life.

Continuing upward, the third floor opens toward the sky through the atrium and the north terrace, becoming the most open part of the house.

Looking upward from the southernmost guest room on the first floor, the courtyard, the open-riser stair, and the third-floor terrace overlap like a series of terraces, forming a single spatial landscape. Each movement through the house subtly transforms the scenery as light, wind, and sky continually shift, quietly influencing perception, breathing, and the rhythm of everyday life.

The intention of this house was to transform everyday movement itself into moments of ippuku. By shaping the environment and layering human movement within it, the project seeks to design not only space, but the quality of time itself.