Space Construction

We are a team of construction professionals committed to turning our clients’ vision into reality. Built on the craftsmanship and technical expertise that have defined UNION TEC since its founding, we deliver every project through four core principles: safety, schedule, quality, and cost management.
With more than two decades of experience, an extensive network of trusted trade partners, and digital project and construction management systems, we provide construction services of the highest standard. Beyond construction, we also support our clients by leveraging our expertise to negotiate with base-building contractors and optimize project costs.
Whether you are planning your first project with us or are a long-term client, you can move forward with confidence knowing that our team will support you every step of the way.

Craftsmanship That Brings Vision to Life

Craftsmanship is where UNION TEC began.
As a design-build company founded by construction professionals, an uncompromising commitment to quality has always been at the core of who we are. Because our construction teams remain an integral part of our organization, they fully understand the design intent behind every project, enabling seamless execution from construction through final adjustments and handover.

An Uncompromising Commitment to Quality

UNION TEC was founded by a master craftsperson with a background in interior finishing. That heritage continues to shape our culture today, fostering a deep respect for craftsmanship and an unwavering pursuit of quality across the company.
Great spaces are built by people, and even the most skilled professionals require rigorous quality control to achieve exceptional results. That’s why every project undergoes two comprehensive quality inspections between the start of construction and project handover, using UNION TEC’s proprietary evaluation standards.
With the precision and attention to detail of true craftspeople, we bring our clients’ vision to life—down to the finest detail.

For more than two decades, UNION TEC has cultivated a team of specialists and a wealth of practical expertise. The experience we have accumulated enables us to deliver projects efficiently and reliably, giving clients confidence from the very first engagement.

A Network of More Than 2,000 Trusted Trade Partners

Over the past two decades, UNION TEC has built strong relationships with more than 2,000 trusted trade partners and building material suppliers across Japan, primarily in Tokyo and Osaka.
Having successfully delivered nearly 10,000 projects, we have established a stable network of highly skilled specialists, enabling consistent quality, dependable scheduling, and competitive procurement. Long-term partnerships also allow us to optimize construction costs while maintaining exceptional standards of workmanship.

Proven Experience Across Diverse Project Types

From renovations valued under JPY 1 million to projects exceeding JPY 1 billion, UNION TEC has extensive experience across a wide range of project scales.
Our portfolio includes workplaces, retail stores, fashion boutiques, restaurants, beauty salons, medical clinics, hospitality facilities, and building value enhancement projects. This breadth of experience allows us to respond flexibly to the unique requirements of every client.

A Digital-Driven Construction Company

UNION TEC leverages proprietary project management systems and business intelligence (BI) tools to centralize information, streamline workflows, share organizational knowledge, and visualize project performance in real time.
This digital infrastructure enables more efficient project execution, tighter cost control, and greater transparency throughout the construction process.

Rigorous Safety and Quality Management

Quality has been central to UNION TEC since its founding.
Supported by experienced professionals and certified specialists, we maintain rigorous safety and quality standards throughout every project. In addition to comprehensive inspections based on decades of accumulated expertise, dedicated sourcing, cost management, safety, and quality control teams oversee every stage of construction—not only the finished result, but the entire delivery process.

More Than 98% Repeat

More than 98% of our projects come from repeat clients.
This reflects not only the quality of our work, but also our commitment to understanding each client’s goals and delivering the most effective solution. Even after project completion, we continue to provide responsive aftercare and long-term support, building relationships based on trust rather than a single project.

End-to-End Support You Can Rely On

At UNION TEC, construction is supported by in-house specialists in design, project management, construction supervision, and procurement. This integrated structure enables us to provide flexible support tailored to each client’s needs.
Even when engaged solely for construction, we carefully define project requirements, coordinate planning in advance, and work seamlessly with our trade partners and internal sourcing, safety, and quality teams to ensure efficient project delivery.

Every project begins with a thorough understanding of our client’s goals. Based on those insights, we propose value engineering (VE) and cost optimization strategies that maximize return on investment without compromising quality.
Careful planning before construction minimizes rework and keeps projects running smoothly. After completion, our dedicated aftercare team provides responsive support, ensuring that any issues are addressed promptly and professionally.