Oiso House | ROOVICE

Oiso House | ROOVICE


  • Project Name: Oiso House
  • Practice: ROOVICE
  • Products: Vectorworks , Sangetsu , tajima , Toli , Sanwa , LIXIL , Toto
  • Completion year: 2022
  • Gross Built up Area: 91 m2
  • Project Location: Kanagawa
  • Country: Japan
  • Lead Architects/Designer: Koichi Takahashi
  • Photo Credits: Akira Nakamura
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Excerpt: Oiso House, designed by ROOVICE, rethinks the residence while conserving the image of the existing premise with the new purpose of a house and office space. To give the house a distinctive harmony, the design aimed to merge materials, colors, and textures with plenty of natural light; choosing the proper color and material for each element enhanced the structure conferring it a predominant role.

Project Description

[Text as submitted by architect] Oiso is a small town located southeast of Tokyo, facing Sagami Bay. It is the location of Roovice’s latest project called Oiso House indeed. This is the renovation of a two-story family house with an office space.

Oiso House | ROOVICE
Entrance door from outside © Akira Nakamura

Initially, the building was designed only as a residential typology, but later on, the owners decided to include a room for remote work. In addition, the client asked to preserve the memories and feelings he experienced in this home.

Oiso House | ROOVICE

Commonly, Japanese wooden houses share a standard floor plan where rooms are developed sequentially along a central hallway without any real connection with each other. Because of that, the circulation focuses only on the central passage, which can easily become tight and uncomfortable, being the sole transition space.

Oiso House | ROOVICE
Doma seen from the entrance door © Akira Nakamura

Then, one of the aims of Oiso House was to rethink the flow while conserving the image of the existing premise where the client lived and grew up. Those two aspects shared a common point within the existing wooden structure.

Oiso House | ROOVICE
2nd floor bedroom restored to its original state © Akira Nakamura
Oiso House | ROOVICE
2nd floor tatami room restored to the primitive state © Akira Nakamura

The nature of timber is to show the different ages it has lived in by absorbing and imbuing them. Therefore, the structure echoes the old dwelling while allowing substantial changes to the room’s disposition. 

Oiso House | ROOVICE
Visual connection between different rooms through the hallway © Akira Nakamura

Regarding circulation, the renovation aimed to reduce the hallway flow by connecting the various spaces. At first, the wall was used to divide the kitchen, and the generous Japanese-style room was removed in favour of an attached cooking and living area. At the same time, removing the sliding doors increased the visual interaction. It avoided the sense of separation that enclosed small chambers could generate.

Oiso House | ROOVICE
Detail of the new opening © Akira Nakamura

Before the renovation, the construction was characterised by a large variety of textures, materials, and colours, which provoked a lack of cohesion on the inside. To give the house a distinctive harmony, the design aimed to merge them under the same conditions: together with plenty of natural light, choosing the proper color and material for each element enhanced the structure conferring a predominant role.

Oiso House | ROOVICE
Kitchen seen just outside the bathroom © Akira Nakamura
Oiso House | ROOVICE
¾ view of living and entrance space © Akira Nakamura

To emphasise those differences, each space received a unique texture and tone: the previous tatami floor didn’t fit anymore with the new purpose of a working and living environment, and it was replaced with a cushion one.

On the second story, the project moved from a renovation to a restoration. In fact, nothing has been changed or moved but only repaired. The surface mats of the tatami in the Japanese-style room were replaced and put back in place, while the walls had been newly wallpapered.

Oiso House | ROOVICE
Frontal tokonoma view from the 2nd living room © Akira Nakamura

Despite what the final result may suggest, the design process developed on fixing and matching the various elements of the building together, leaving the structure independent at last. Every change applied was intended to soften the secondary components while paradoxically fortifying its major wooden one by not touching it at all.

Oiso House | ROOVICE
Detail of the connection between kitchen and living © Akira Nakamura

It’s worth noting how the structure was still in a surprisingly good condition, unusually for old Japanese wooden houses, preventing any seismic retrofitting additions. This allowed the design to keep the image of the traditions that only wood can provide.

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