This is a house for a couple in their 40s for spending valuable time with their two daughters. As a motif for the plan, the husband, who is a company owner, chose designs by Alvar Aalto and the small churches that are the heart and soul of people, of which he was influenced when he traveled Northern Europe. The living spaces are filled with the warmth of wood, which is somehow similar to idyllic scenery in Japan.

The site is flag-shaped (a rectangular site with a pole-like narrow path), and surrounded by neighboring houses from all directions. Due to the strictly regulated setback from three directions, the house has an interior space with a complicated roof shape. A large bedroom for the family, storage spaces, a kitchen, and bathrooms are compactly arranged on the first floor, while an expansive open-plan space is placed on the second floor, where all the family members can spend relaxing time. The roof is designed with exposed rafters, which consist of pairs of SPF lumber. Taking advantage of the steep angle, the dynamic sloped ceiling provides the space with expressions of both fineness and boldness.

Diffused light from a narrow skylight on the north side softly passes through louvered rafters, enclosing the living/dining room with steady natural light. The small loft space above the open ceiling loosely confronts the second floor, and unfolds as a compact but comfortable kids’ room that resembles a tree house.

At night, cove lighting illuminates the rafters and creates a dramatic expression unlike that of daytime. Use of steel frames for gable beams increase the sharp expression. The loft is intentionally designed without walls. Instead, handrails hang from the ceiling in order to create a space with a unique floating feeling.


  • Location Mitaka city Tokyo
    Completion 2015.3
    Site Area 131.07㎡
    Building Area 52.42㎡
    1F floor area 52.42㎡
    2F floor area 50.24㎡
    Total floor area 102.66㎡
    Structure Timber
    Scale 2F
    Typology Private housing
    Structure engineers Masaki Structures
    Kenta Masaki
    Facility engineers Naoki Matsumoto
    Costruction Yamazen Kensetsu
    Photographer Masao Nishikawa
  • 所在地 東京都三鷹市
    竣工 2015年4月
    敷地面積 131.07㎡(39.64坪)
    建築面積 52.42㎡(15.85坪)
    1F床面積 52.42㎡(15.85坪)
    2F床面積 50.24㎡(15.19坪)
    延床面積 102.66㎡(31.05坪)
    構造 木造
    規模 地上2階建
    用途 専用住宅
    構造設計 正木構造研究所
    設備設計 松本尚樹
    照明設計 シリウスライティングオフィス
    施工 ヤマゼン建設
    建築写真 西川公朗