Policies and Basic Approach

The Taisei Group considers it its crucial mission to efficiently and continuously provide high-quality construction products and related services to clients and society. In order to fulfill this mission, we strive to meet the expectations and gain the trust of both our clients and society by conducting business activities in accordance with the Group Action Guidelines on Quality. Furthermore, under the [TAISEI VISION 2030] Achievement Plan, the fundamental policy is to uphold proper quality control, aim to eliminate all defects attributable to quality mismanagement and improve customer satisfaction.

Risks and Opportunities

Policies / Commitmetns

• Action Guidelines for Taisei: Pursuing customer satisfaction, ensuring and improving safety and quality
• Quality Policy
• [TAISEI VISION 2030] Achievement Plan / Policy on Business Foundation Development: Quality

Goals

Initiatives to Achieve [TAISEI VISION 2030]

Fundamental Policy: We uphold proper quality control, aim to eliminate all defects attributable to quality mismanagement and improve customer satisfaction.

• To Establish a Quality Control Monitoring System and Uphold Proper Quality Control Aligned with the Quality Control Process Through Cooperation Among Relevant Divisions
• To Share Quality-Related Information Utilizing Digital Technology
• To Maintain ISO 9001 External Audits and Certification
• To Use Customer Evaluation Results Effectively
• To Collect and Evaluate Trouble Cases and Share Them with All the Executives and Employees

KPIs

• Customer satisfaction (Building Construction and Civil Engineering): [FY2026] 100% / [FY2030] 100%
• Number of major quality-related problems (Building Construction and Civil Engineering): [FY2026] 0 cases / [FY2030] 0 cases

Initiatives

• ISO9001

Structures and Systems

Quality Control System

To Establish a Quality Control Monitoring System and Uphold Proper Quality Control Aligned with the Quality Control Process

In response to the quality defect incident in FY2023, all executives and employees have returned to the core principle of “TAISEI QUALITY* - Quality is Our Pride.” We are working to strengthen collaboration among internal departments involved in quality management and ensure proper management aligned with the quality control process. In civil engineering, the Civil Engineering Division, branches, and worksites coordinate closely, while in building construction, the Building Construction Division, Quality Control Division, branches, branch quality specialists, and worksites collaborate to ensure adherence to quality control processes and establish a robust monitoring system. To prevent risks, quality patrols are conducted from an impartial third-party perspective, “cold eye review,” to identify and mitigate risks. In the event of a quality issue, the head office and branch offices are set up to support the worksite and prevent the issue from escalating.

*TAISEI QUALITY:
Our Group's activities for quality promotion are summarized into TAISEI QUALITY. The Taisei Group employees are proud to dedicate to quality, and strive to earn the trust of customers and society.

Establishment of Quality Control Division under the Direct Supervision of the President

In May 2023, we established the Quality Control Division directly under the President’s supervision to strengthen the quality control system within the building construction business and ensure thorough adherence to quality control processes. This division is specifically tasked with overseeing and guiding quality control efforts. Its role includes inspecting the quality processes during construction to ensure smooth execution that aligns with customer requirements and contractual agreements.
Specifically, the division assesses the implementation status of the quality control processes from an independent, third-party perspective during the head office’s Quality Patrol, as well as interim and final inspections, in accordance with the Construction Operation Standards. If any construction work does not comply with the established quality control processes or if issues are identified on-site, the division instructs the project manager to correct the issues within a specified timeframe. If the necessary corrections are not made, the division orders the branch office to halt the work until compliance is ensured. Moreover, the division regularly audits the activities of the technology control departments and sections within the branches, providing ongoing support and guidance to maintain the effectiveness of the quality control processes. This support and guidance are also extended to the worksites and the full-time quality control personnel within the branches.

Quality Control System for the Building Construction Business

To Collect and Evaluate Trouble Cases and Share Them with All the Executives and Employees

Quality-related issues arising at worksites are swiftly collected by head office via branch offices. Each case is evaluated based on the event and its causes. After verifying the countermeasures and recurrence prevention measures, the information is shared horizontally across all branches, helping to prevent similar issues from reoccurring.

ISO External Audits and Certification

Each division and group company has obtained ISO 9001 certification, the international standard for quality management systems, and continues to undergo audits conducted by third-party organizations to maintain this certification. Additionally, we have obtained ISO 14001 certification for our environmental management system and ISO 45001 certification for our Civil Engineering Division to provide a safe and healthy working environment.

Quality Policy of each Division

Building Construction Division

Following the revision of ISO 9001 in its 2015 edition, we have aligned the Construction Operation Standards as the benchmark for our quality control manual. We champion quality control by executing workflows in accordance with this standard. Our divisional quality policies are centered on consistently offering construction products and services of high caliber that cater to the expectations of clients and society. We commit to ensuring customer satisfaction and trust and place emphasis on nurturing enhanced relationships with our clientele.

Civil Engineering Division

Aiming to deliver superior civil engineering structures tailored to client needs, we harness our expertise and organizational strength as a comprehensive construction entity. With the genuine and swift collaboration of everyone involved in a project, we strive to achieve a standard of quality and service that resonates with client satisfaction. We also endeavor to enhance customer satisfaction by perpetually refining the efficiency of our quality management system, targeting its more proficient application.

Engineering Division

The Engineering Division was established in 1968 as the first engineering division among general construction companies in Japan and has the longest history and a proven track record spanning more than 50 years. For more than 20 years since it obtained ISO9001 certification in 1996, the first among all divisions in Taisei Corporation, it has engaged in quality management activities, realizing customer needs and building the trust of many customers.
In 2020, the Engineering Division switched to the same certification body as the Building Construction Division and Design Division, and further continues to take great strides as a division capable of satisfying requirements consistently from project planning to design and construction.
In order to achieve customer satisfaction, the Engineering Division upholds “continuously providing high-quality facilities and services that satisfy customer needs” as its own quality policy under the corporate Quality Policy and engages in activities to improve quality by establishing specific principles of conduct as follows:

1. Precisely identify and address client requirements
2. Develop human capital capable of delivering innovative services
3. Adhere to all laws and regulations
4. Implement and continuously maintain a suitable quality management system

Design Division

Both the Design Division and its eight branch departments have collectively achieved ISO 9001 certification. This ensures a consistently high standard of design quality across all our departments nationwide. In 2016, we founded the Taisei Construction’s First-Class Architect Supervision Office, granting it independent authority to oversee construction projects.
Back in June 2002, our Design Division was a pioneer in the construction sector by securing the Information Security Management System Certification (previously BS 7799, now ISO 27001). We are holistically advancing our quality standards through ISO-driven initiatives spanning quality, environment, and information security.

Nuclear Facilities Division

Under the umbrella of the Company’s Quality Policy, this division is committed to elevating the safety, reliability, and environmental preservation of nuclear-related facilities. This commitment extends to designing, surveying, researching and developing, conducting demonstration tests, and offering technical support to nuclear facilities.
As required, we adhere to the Rules of Quality Assurance for Safety of Nuclear Power Plants JEAC 4111 (by the Japan Electric Association), the Guidelines for Quality Improvement of Analysis Services Pertaining to Licensing at Nuclear Facilities (by the Japan Nuclear Safety Institute), and the Quality Assurance Requirements for Nuclear Facilities NQA-1 (by The American Society for Mechanical Engineers or ASME). We ensure alignment with the unique quality assurance expectations of our clients, which include major electric power corporations.

Activities / Efforts

Full-Scale Operation of the Steel Frame Academy

In FY2024, we launched the Steel Frame Academy to provide comprehensive education on steel frame construction. This program is aimed at employees and temporary staff with limited experience in steel frame construction, including those from the Group companies.
The three-day curriculum includes both classroom lectures and hands-on training, where participants thoroughly learn key aspects of steel frame construction by “checking the actual product” through mockups installed at our prestressed concrete (PC) factory. In FY2024, we held 22 sessions as of February 2025 to enhance the skills of numerous employees.

Support for Worksites Through a Technical Consultation Desk

In April 2024, we established a technical consultation desk as a point of contact for worksites seeking technical advice.
The Technology Control Department of the Building Construction Division handles inquiries via email, addressing questions such as “What technical considerations should be made?” and “What are the critical points to note about this material?” Through this service, we provide appropriate advice to support quality control at the worksites.

Enhancement of Quality Control Operations through the Use of Digital Data

As part of the [TAISEI VISION 2030] Achievement Plan, under the theme “Business Transformation: DX,” we have identified priority areas for advancing production processes. These include the “automatic acquisition and storage of all the data on completed works and quality control data using IoT” and the “advanced management through digital twins (visualization of worksite conditions).” We are actively promoting the enhancement of quality control operations through the use of digital data.
We are strengthening the development of a quality record database to enable employees at worksites and partner companies to share drawings, quality control, and process control data. Using a cloud-based system, we make visible various aspects of quality control, such as the status of quality patrols, to increase the effectiveness of quality management activities.

Customer Satisfaction Survey

During the design and construction phases, we carefully gather our clients’ thoughts and strive to offer comprehensive plans based on clear concepts. After the handover, we conduct customer satisfaction surveys. We conduct management reviews of these results and share them internally. Furthermore, the results are used to incorporate client feedback into design and after-sales services.
The FY2023 results are as follows:

• Building Construction Division

In the Building Construction Division, each branch conducts a questionnaire survey on customer satisfaction. The survey questions are on a five-point scale, and include those on workmanship, usability, and worksite office management during construction. The satisfaction rate in FY2023 was 82.8%. For low scoring items, we analyze their causes, establish countermeasures, and reflect them in post-construction review meetings. In this way, we aim for further improvement and the establishment of good relationships with customers.

• Civil Engineering Division

Calculated based on the owner’s construction evaluation scores as a metric, the satisfaction rate for FY2023 was 98.6%. We also conduct interviews, and each branch shares these results in construction review meetings, aiming for improvements. Both the head office and branches are united in their commitment to continually enhance customer satisfaction.

Quality Awareness Initiatives for Employees

Building Meister System / Educational Supporter System

• Building Construction Division

The “meister system” and the “HQ staff's coaching system” were put into practice from 2009 as part of the “TAISEI QUALITY” activities to promote the acquisition of skills and expertise in order to securely pass along our technologies and know-how, with the aim of strengthening productivity and the construction management system.
The employee's appointed as meister and the executive staff of the Building Construction Division, with abundant on-site experience, make actual visits to the sites and provide education and guidance on the skills and quality/site management and other capabilities through OJT, in close contact with the young and middle-aged employees.

• Civil Engineering Division

Under the “educational supporter system” introduced in 2009, educational supporters appointed from among employees with experience as construction site managers check the progress of OJT education of young employees and provide support and guidance. The Civil Engineering Division strengthens employee's management capability to reinforce productivity and the production system, in addition to “improvement of the working environment” and “securing of human resources.” Specifically, under the goal of “increasing the employees capabilities at production sites,” the “On the Job Training (OJT) education” is introduced and operated to enhance the capabilities of process management, design, estimation, negotiation and action, among others.

Explanation of the Technology Search System and the Educational Site for Employees

We launched an AI-based technology search system and an on-demand video educational site, along with initiatives to enhance quality awareness among all employees. The educational site also allows you to effectively use images in various situations, such as internal training materials, press releases, and both internal and external presentations.