House in Kita-Koshigaya by Tamotsu Ito + Satoshi Numanoi

A non-modern imagination of the suburban life in Japan

Project Specs


非常感谢 Tamotsu Ito Architecture Office + Satoshi Numanoi Architect & Associates 对gooood的分享。更多请至:Tamotsu Ito Architecture Office on goooodSatoshi Numanoi Architect & Associates on gooood
Appreciation towards Tamotsu Ito Architecture Office + Satoshi Numanoi Architect & Associates for providing the following description:


A single-family house designed in suburbia of Tokyo. Instead of regarding a suburb as a subordinate of metropolis, this young couple’s suburban life could be truly centered by working more than three days a week from home. This change made us to come up with a new (or non-modern) house-type with the same budget as the neighboring mass-produced houses. It required much more diverse spaces to accommodate their working environment and places for multiple hobbies (indoor-outdoor), without increasing total floor area.

▼住宅外观,exterior view

建筑基于一个九宫格的平面建成,其尺度参考了日式建筑中以2430mm和1820mm为单元的两种模块:地面采用了2430mm的模块,墙壁使用了1820mm的模块( 2430×3与1820×4的乘积仅相差10),巧妙地迎合了成本与建造标准的需要。与此同时,总平面由包含不同功能的零碎空间组合而成,并没有遵循模块的尺寸(2430mmx 2430mm的空间作为卧室太小,作为单人活动空间又有些大)。这样一来,实际的空间和功能都没有因为网格的存在而受到限制,因此也能够激发居住者对于空间的想象力,将他们在室内和室外的活动随时随地联系起来。

▼一层平面图,plan level 1

The tiny nine square grid plan is applied, whose dimensioning is based on two kinds of modules in Japanese construction; 2430mm module and 1820mm module. 2430 x 3 = 1820 x 4 = 7280. 2430 became the module of floors, while 1820 became the module of walls, dealing and playing with economy/convention of dimensions in construction. The overall plan is made as a collective of fragmented places for different behaviors throughout the stacked grid.  2430 x 2430 is too small as a room, but too big as a spatial unit for one person’s activity. The grid corresponds neither to behaviors nor to rooms. Therefore, this house with rigid tectonics would invoke one’s imagination for the production of space, linking one behavior to another, inside and outside, without fitting too much to what can happen inside time to time.

▼入口区域,entrance area

▼实际的空间和功能没有因为平面网格的存在而受到限制,the square grid plan corresponds neither to behaviors nor to rooms


Learning from the old townhouse / farmer’s house type in Japan, the entrance door has two way opening system, normally working as a hinged door, occasionally working as a large sliding door to connect the “doma” space with the outside.

▼室内外过渡区域,“doma” space

▼门厅区域,entry hall


Without losing the simplicity of construction, the design accumulates decisions to hybridize its spatial qualities. For instance, the roof plan is separated in 45 degrees to create low/high ceiling space at 2F, as well as inviting the southern light towards the living-dining area. The concrete exposed to the interior is constructed as a foundation. The foundation looks similar to neighbors from the outside, but the floor levels inside are shifted closer to the ground, creating the level difference from surrounding windows.

▼从门厅望向屋顶,view to the roof from the entry hall

▼室内概览,interior overview

▼上下层空间关系,the spatial relationship between 1F and 2F

▼倾斜的屋顶为起居室和餐厅带来南向的自然光,the roof is separated in 45 degrees to invite the southern light towards the living-dining area

▼工作空间,working space

▼从楼梯间望向餐厅,view to the dining area from the stair

▼室内细部,detailed view


The clients brought us a non-modern imagination of the suburban life in Japan, as a hybrid of natural and urban environment, and as a middle point between metropolis and nature. Our attempt in this project is to respond to it with non-modern architecture to amplify the imagination, learning from new and old lifestyles, histories, and architectural languages.

▼屋顶平台,roof terrace

▼住宅夜景,night view

▼二层平面图,plan level 2

▼屋顶平面图,roof plan

Location: Saitama, Japan
Program: Single Family House
Design: Tamotsu Ito + Satoshi Numanoi
Structural Design:Yoshihiro Fukushima
Construction:Ohmori Carpentry Construction

Site Area: 107.90 m2
Building Footprint: 53.00 m2
Total Floor Area:101.56 m2
Completion:August, 2018
all photo credit: Masaharu Okuda

tamotsu ito architecture office
Satoshi Numanoi Architect & Associates

More: Tamotsu Ito Architecture Office;  Satoshi Numanoi Architect & Associates更多请至:Tamotsu Ito Architecture Office on goooodSatoshi Numanoi Architect & Associates on gooood

Click to contact with the designer/author

Post a Comment