KEY OPERATION INC. is looking for design staff (experienced, full-time employees).


KEY OPERATION INC. is looking for design staff (experienced, full-time employees).

KEY OPERATION INC. is looking for design staff (experienced, full-time employees).

Our company has been in business for 19 years.
Our goal has always been to create beautiful architecture by carefully examining and analyzing our clients’ requirements and finding new architectural solutions. We hope to use architecture to improve the economies of cities and regions, foster culture, and address social and environmental issues.

The president, Hikaru Koyama, gained practical experience at architectural design firms in the UK, such as David Chipperfield Architects. For the first 10 years of his career, he mainly worked on project management for overseas brands, but since then, the percentage of architectural design work has increased, and he has worked on a diverse range of projects from residential housing, condominiums, rental housing complexes, tenant buildings, restaurants, movie theaters, and office buildings to cemeteries and train station buildings. The company’s careful pursuit of the business potential required for commercial facilities and housing complexes, while achieving a high level of design quality, has been highly evaluated by clients and has led to the acquisition of new properties.

We are looking for designers who have gained experience at design offices or design departments of general contractors. We are often asked to work on projects that are large for an atelier office, such as small to medium-sized housing complexes, commercial tenant buildings, office buildings, etc., and small for an organized office, and we are looking for people who want to work on smaller projects with a smaller number of people before becoming independent from an organized office or general contractor’s design department, or people who have worked for an atelier office but want to work on smaller projects with a smaller number of people before becoming independent. We believe that this is a good environment for those who are working for an atelier firm and want to gain experience in designing and supervising not only small residential projects but also larger projects. After becoming independent, you can still be involved in our projects as a support member until your work becomes more stable.

We are also looking for people who have left design work after marriage or childbirth, but would like to return to design-related work. You can also become involved as a support member of our projects. We have not only young members but also many staff members with children, and some former employees have returned to work and are now working part-time.

We are also looking for graduates and new graduates at the same time. We are looking for graduates and new graduates at the same time.

At our company, you can acquire a variety of skills on-the-job in a short period of time. If you have experience with 3D software, you can learn basic operations in about one month. We also receive orders for management of overseas brands on an ongoing basis, so it is possible to develop language skills.
In addition, we believe that by working on design work with business potential in mind as well as architectural design, you will be able to acquire skills not only as a designer but also as a manager in the future.

The office is located in a building just a 3-minute walk from the station facing the Gakugei Daigaku shopping street, and there are many good restaurants nearby where you can enjoy a delicious lunch. The office is small in size with nine employees (six men and three women), and we aim to create a fulfilling work environment with a homey atmosphere and the freedom to make suggestions. Several former employees who have become independent also participate in projects as support members, and you can learn various architectural knowledge through discussions with our experienced members.

We are looking forward to working with anyone who has a passion for architectural design.

2023 “Ikebukuro Terrace Building” Good Design Award
2023 “ZOOM Togoshiginza” Good Design Award
2023 “Hayama Huts” German Design Awards 2024 Winner
2023 “Sakuragicho Housing Complex” iF DESIGN AWARD 2023 Winner
2022 A+Awards Best of Asia Jury Prize
2021 “Housing Complex in Kannai” Good Design Award
2021 “Housing complex in Fudomae” Winner, Iconic Awards 2021 Selection
2021 “Residences in Kannai” Winner, Iconic Awards 2021
2021 “Housing complex in Fudomae” Iconic Awards 2021 Selection Winner
2021 “Small Approach in Jingumae” won Future Project Awards 2021
And many more

Recently completed projects
Shimokitazawa Terrace Building 
Juzen Chemical Corporation Head Office Building
Hayama Huts

Current ongoing projects
A certain railroad station area facility improvement plan phase 2 (under planning and design)
Shimokitazawa Commercial Building (under planning and design)
Sangenjaya commercial tenant building (under planning and design)
Hongo Rental Housing Complex (under planning and design)
Kameido Rental Housing Complex (under planning and design)
Tomigaya multi-purpose building (under planning and design)
Akiya Villa (under planning and design)
Hayama Isshiki Villa (under planning and design)
Minato-ku private residence (under design)
Kanda commercial tenant building (under design)
Nakameguro Rental Housing (under design)
Sendagaya Office Building (under design)
Shinjuku commercial tenant building (under design)
Fukasawa Commercial Tenant Building (under construction)
Nakajo Co-creation Forest Open Innovation Laboratory in Niigata Prefecture (under construction)
Toyama Okuda-Jusumachi House (under construction)
Kojimacho Housing complex (under construction)
Housing complex in Shinjuku 1-chome (under construction)
Apartment complex in Shinjuku Samonmachi (under construction)
Ikebukuro mixed-use building (under construction)
Nagoya Kenchiku Juku Building (under construction)
House Minami Azabu (under construction)
Berluti Azabudai Hills (under construction)
Charles&Keith Shibuya (under construction)
The progress of each project can be viewed on the following Instagram

■Positions available
Chief Architect
A person who has at least 5 years of work experience and is capable of performing planning and design, basic and implementation design, and site supervision as the main person in charge of multiple projects. Must be able to organize and lead a design team.
Salary: From 300,000 yen. To be determined based on experience, ability, and qualifications.

Those who have at least 3 years of work experience and are capable of planning, basic and execution design, and site supervision at their own discretion as the person in charge of the project.
Salary: 250,000 yen- Salary will be determined based on experience, ability, and qualifications.

Assistant Architect
Graduated from a university or graduate school of architecture, or have the same or higher ability.
Salary: 180,000 yen- Salary will be determined based on experience, ability, and qualifications.

Trial period: 2 months (no trial period is required if the candidate has extensive experience in the field and wishes to work).
Social insurance including workers’ accident compensation insurance, unemployment insurance, health insurance (medical checkup once a year), and employee pension (except during probationary period). Salary increase once a year. Bonus: Once a year. Transportation expenses: up to 20,000 yen/month.

■Working hours
9:30-18:30 (8 hours per day) Flexible work hours and remote work are negotiable.

■Vacations and vacation
Saturdays, Sundays, national holidays, statutory paid vacations

■Software used
Revit, AutoCAD, SketchUp, Lumion, ADS, Adobe systems, Office systems


How to apply.
If you would like to apply, please send us your resume, brief portfolio, and resume in PDF format to Personal information of applicants will not be used for any purpose other than recruitment. We will contact you for an interview only at a later date.

Company Information

Doors Gakugeidaigaku 4F, 3-19-10 Takaban, Meguro-ku, Tokyo 152-0004, Japan
t: 03.5724.0061 f: 03.5724.0062


Kanda Terrace was selected as Blueprint Awards 2018-Commended.


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“Shimokitazawa Terrace Building” has been uploaded.

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  • KEY OPERATION INC. is looking for design staff (experienced, full-time employees).