一畳十間 一畳十間






ichijo-toma is a lifestyle design service focused on Japanese styled enjoyable and comfortable way of living.

We value the wisdom that has been cultivated in the lives of Japanese people over the centuries, as well as the materials that have been long respected.

We hope to liberate the monotonous lives of people nowadays living in standard nLDK apartments.

By incorporating hand-crafted elements into a space, we aim to provide people with endless creativity and warmth. Our task is to help create an environment where people can relax and enjoy in their daily lives.

Case Study

Welcome to visit the life of ichijo-toma.


Case Study

Welcome to visit the life of ichijo-toma.


Case 10.

Case 10. gallery Ichijo-toma

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view the details


Case Study

Welcome to visit the life of ichijo-toma.


Case 11.

Case 11. gallery HARANOKAMI 原野上画廊

view the details


view the details





Most people nowadays tend to choose the most standard finishing materials just for convenience, and this resulted the increasing likeness of all recently developed residential spaces.
On the contrary, ichijo-toma appreciates the aesthetics that prospered from the traditional Japanese culture; therefore, we are more inclined to use materials that are appropriate to convey the local ideology.
Let the gentle atmosphere created by light and touch harmonize in time, evolve and finally become a part of the family, together creating a more abundant life.


Keiso-do (diatom mud)

The shadow created by the coarse texture of diatom mud constructs a tranquil and pleasant atmosphere, bringing people the emotions of Japan with the imagination of living in the natural landscape.





Natural wood is composed of an infinite number of elements, and its expression delivers livelihood to the household while balancing the quality of life. The presence of natural wood exerts a subtle influence on the family, changing with them as time goes on.




Doma (floor at entrance)

This transitional space at the entrance is tiled with natural pebble stones which convey a sense of delicacy and peace. Their unique texture creates a relaxed yet elegant welcoming space.

土間 (玄关的地面)




The softness breathes nostalgia and peace when stepped onto it. Tatami rooms have many ways to use; they can become comfortable guest rooms covered with bedding, or become children’s rooms as the kids grow up.





Japanese styled sliding doors with washi paper will allow the guests immerse in the most exquisite and sophisticated aesthetic traditions of Japan. Direct sunlight is diffused through the washi paper, creating a tender and cozy atmosphere.





Each tile is different from one another, unique in its shape and color. Its mild touch and silky texture add a drop of vibrant spirit into the space.






Through lighting design and customized furniture, ichijo-toma brings out the beauty of natural materials and the characteristics of the spatial layout, further enhancing the space to adapt to the lifestyle of each client.


Material Treatment

Taking vibrant and expressive materials, we provide the clients with material treatment techniques that can maintain or even prolong the lives of these natural materials.




Customized Furniture

ichijo-toma furnishes the house with originally designed furniture that are functional, easy to use, and aesthetically pleasing. The furniture will blend into the house without any waste of space.




Lighting Design

Another day full of bright and lively morning sunshine. Dim the lights and enjoy the quiet evening catch-ups at the end of a long day. Peaceful self-time trying to focus on a particular moment.




Plan Layout


Japanese people in the ancient times mostly lived in houses where the rooms divided and connected with sliding doors. This made them more considerate about the family members that live with, paying more attention to their inter-family relationships.
The way ichijo-toma lays out the rooms also respects the value of having a comfortable and healthy relationship among family members.
Some clients only seek the maximum numbers of room, but we advocate for the simple lifestyle like that of the families in the old days. On top of ensuring each family member has his/her own space in the house, a good plan layout guarantees a pleasant yet flexible and versatile lifestyle while subdividing the house into a minimum number of rooms.


Winding Path

Like the looping and meandering trails, you can discover the surprises in a variable of spaces while walking around the house. Free-formed plan layout can create a space full of curiosity, as well as a well- ventilated environment.




Individual Room

Some spaces are more comfortable because of their small sizes. We believe that the size of each room should be dictated by its function, so we will eliminate all unnecessary elements while maintaining the minimum area necessary for each space, boldly dividing and creating enjoyable small spaces.




Without Corridors

We will eliminate the corridors that are only there as a division between rooms. Some storage or a small reading room can subtly fit in even the narrowest space, scattering the different life-essential areas throughout the house.





Step 1. The Basics

步骤1. 温馨提示

Please read the following information carefully.


  • Design Service Extend
    We undertake renovation projects of the entire property only - we do not accept renovation of a portion of the house. Clients may purchase furniture, lighting, and other accessories at their will, or ask ichijo-toma to customize them, including but not limited to dining table, reading desks, lamps, etc.


  • 关于费用

    About the Cost
    The construction cost differs by each project’s size and material selection. The cost starts at about 150,000 Japanese yen per square meter in the Metropolitan Tokyo area in Japan, and about 6000 RMB per square meter or more in China. The construction cost for each project varies greatly by area, please contact for more details. Existing conditions – necessary demolition, insulation, window frame upgrade, etc. will affect the cost significantly as well. In addition, the design fee will be determined case by case, depending on the square footage, location, etc. The transportation cost will be in addition to the design fee if the project is located in a remote location.

  • 关于材料的选择

    About Material Selection
    ichijo-toma carefully studies each material and makes appropriate recommendations to the clients, including but not limited to wood, tatami, diatom mud, and tiles. Please see our standard finishes here. Additional details, door handles and other hardware that are unique in a case-by-case situation, we will also have carefully selected recommendations for you.

  • 关于平面布局

    About Plan Layout
    Our proposal will be based on each client’s individual needs and requests. Our design will create a versatile big space, within which will have enough number of rooms for each member of the family. Please refer here for the methodology behind our plan layout. The need for a tatami room will be determined by the necessity of the client.

  • 关于每年承接的业务数量

    Quantity of Projects Per Year
    We greatly value the quality of our projects, therefore we will undertake no more than 10 projects each year. The design and construction schedule will be determined for each project individually, and we would like to do so at the beginning of our conversation with you.

Step 2. Getting in Touch

步骤2. 咨询

After reading the information above, please contact through this design consultation form. We will get back to you within three business days.


Step 3. Free Consultation

步骤3. 免费详谈

At a date of your desire, we can schedule an individual meeting with you, either in person or online. We would like to get to know you and your style of living, as well as any thoughts on your construction budget and schedule. It would be the most helpful if you could share with us the project’s architectural drawings or photographs. At the time, we will also explain to you in detail about our design concept and flow of work. We can also take you on a tour of our completed project if you are interested to see our work in person.


Step 4. Site Survey

步骤4. 现场调查

We would like to visit the site to check the current conditions of the house in order to make realistic projections about the project. Construction cost and schedule will also be discussed at the time. Transportation fee will be at the cost of the client if the project is located outside the Kanto area in Japan or the metropolitan Shanghai in China.


Step 5. Design Contract Signing and Start of Design

步骤5. 签署设计合同,开始设计业务

We will proceed to the contract signing process after completing steps 1-4. We will spend the following 2-3 months working closely with you on refining the design to meet your needs and expectations.


Step 6. Construction Contract Signing and Start of Construction

步骤6. 签署施工合同,开始施工

Getting the quote for construction cost and adjusting it to fit within your budget will take approximately 2 weeks to 1 month. The client will sign the construction contract once the final quote is adjusted and accepted. Construction will start immediately after completing any necessary reports or communications with the apartment/neighbors. ichijo-toma will be responsible for site supervision, making sure the construction keeps going on schedule. The construction process usually takes about 3 months, but it could vary based on the scale of the project.


Step 7. Completion and Project Hand-Over

步骤7. 项目竣工并交付

After completing a series of rigorous inspections with the client present on site, we shall call an end to the project and handover the house.