About us



Sankaku-ya is a group that creates Japanese architecture.
Our ideal Japanese architecture is a building that makes the most of the power of materials through the skills of craftsmen.
At Sankaku-ya, we have the materials, techniques, carpenters, and architects necessary to make this happen.


滋賀県高島市の朽木工場と京都市内にある事務所の二つの場所をものづくりの拠点とし、 原木から挽いた素材を揃え、常に大工と設計士が切磋琢磨し、より完成度を高めるための仮組を行う−。


Based on traditional Japanese building techniques, we practice a wide range of craftsmanship, from tea ceremony rooms, private residences, and small stores to public buildings, including gardening, both in Japan and overseas.

Our ancestors enjoyed not only the material beauty of things and spaces, but also the beauty of changes over time, such as the passage of time and the seasons. The gardens and teahouses that are built in Japan also place emphasis on creating and reproducing the flow of time and the changing natural landscape as it is.

We value the aesthetic sense and sensibility that has been nurtured and refined by the climate of Japan since ancient times and that resides latently within us, and with respect for the skills and spirit of Japanese architecture that have been handed down over the years, we continue to face the challenge of creating products that meet the needs of the current age.

01. Materials


At Sankaku-ya, we procure the unique lumber we use as building materials in its original form through our own routes, both domestic and international, and then saw, dry, and store it at our vast factory in Takashima City, Shiga Prefecture.
As a forested country, Japan has been confronted with wood since ancient times, and by taking advantage of its characteristics, has created buildings that can withstand the elements for hundreds of years. The reason why we insist on sawing lumber from raw wood is because we believe in the importance of always feeling the materials close at hand.
Even though the times have changed, we at Sankaku-ya have inherited this attitude and continue to manufacture products while listening to the voice of the materials.

02. Technic


A good carpenter uses different tools for different species of trees and materials, and works with natural materials based on their inherent properties. By using the strengths and weaknesses of the materials in the right places, a sense of harmony and unity is created between the building and the garden, resulting in a comfortable architecture.
We at Sankaku-ya believe that it is our mission to preserve these techniques and pass them on to the next generation so that we can continue to make products that will not decay or become more beautiful in 100 or 200 years.

03. Pre-build


When constructing a building, it is common to prepare materials at the site and assemble them while processing them. However, at Sankaku-ya, we use a process called "tentative assembly" where the building is assembled in the factory as close to completion as possible. The carpenters and designers actually assemble it through a trial-and-error process, so that the two-dimensional image expressed on the drawing can be experienced as a three-dimensional image, and the two can be reconciled.
Once the building is temporarily assembled, we dismantle it, transport it to the site, and reassemble it, so that no matter where in the world it is built, we can build it efficiently and quickly while maintaining high quality.
This is one of the main reasons why Sankaku-ya uses temporary assembly, as it allows us to share the feeling of "building together with the client".

04. Design


Our job as designers is to listen carefully to the thoughts and images of our clients, and think one step beyond the ideal that cannot be fully expressed, while maximizing the potential appeal that the space should have.
We do not only consider the building, but also the character of the land on which the building stands, the surrounding environment, and the landscape, so we are good at complex architectural planning, such as considering the building and garden as a whole.
Another of our strengths is the close proximity between the architect and the carpenter, which allows us to discuss and work closely with them until the project is completed while seeing the actual materials in front of us.
A building is not finished when it is built, but is nurtured over a long period of time, so even after completion, we can make minor repairs and design changes.