Research and development of fundamental technologies and proprietary construction methods, and external collaboration

「We believe that synergies can be created by mutually complementing our technical capabilities in foundation work, ground improvement construction and automated construction with GECOSS CORPORATION's long-standing expertise and customer network in its heavy temporary works and construction machinery businesses. We therefore determined that this business alliance would contribute to the further expansion of our existing businesses and growth areas and to enhancing corporate value.」

「The company is also actively promoting technical exchanges and joint development with universities, public institutions, private-sector companies and overseas companies to further refine the Group's core technologies of drilling and grouting, while aiming to establish mechanized construction technologies that use ICT. R&D expenses for the fiscal year were ¥100 million, and an overview of this R&D is provided below. (1) R&D related to automation (percussion drills) The series of operations of the skid-mounted percussion drill (A-RPD), namely drilling and connection, has been automated, and it can accommodate drill diameters of 3–5 inches.」

「R&D expenses for the six-month interim consolidated accounting period were ¥41 million, and there have been no material changes in the status of the Group's R&D activities.」

「R&D expenses for the fiscal year were ¥142 million, and an overview of this R&D is provided below. The company continues testing to further improve productivity by using ICT. Development of the positioning guidance system and as-built management system is largely complete. The company has also obtained technical review certification and completed registration with NETIS (New Technology Information System).」

「R&D expenses for the first nine months of the current fiscal year were ¥84 million, and there have been no material changes in the status of the Group's R&D activities.」

「R&D expenses for the first six months of the current fiscal year were ¥83 million, and there have been no material changes in the status of the Group's R&D activities.」

「R&D expenses for the first three months of the current fiscal year were ¥17 million, and there have been no material changes in the status of the Group's R&D activities.」

「During the fiscal year, the company confirmed the method's excavation performance in hard ground in Miyagi and Gunma prefectures. It also expanded the scope of application by carrying out construction with added ICT functions in Gunma Prefecture and construction using compact machinery in Shizuoka and Fukuoka prefectures. In Okinawa, it confirmed the performance of a compact machine in improving weathered mudstone and excavating solidified mudstone. The company also obtained technical review certification and has submitted an application to NETIS (New Technology Information System).」

「R&D expenses for the first nine months of the current fiscal year were ¥75 million, and there have been no material changes in the status of the Group's R&D activities.」

「R&D expenses for the first six months of the current fiscal year were ¥55 million, and there have been no material changes in the status of the Group's R&D activities.」

「R&D expenses for the fiscal year were ¥140 million, and an overview of this R&D is provided below. (1) Development of middle-depth mixing technology The company developed a middle-depth mixing method that uses its proprietary mixing blades, attached to the end of the arm of a backhoe-based construction machine, to mix cement solidifying material and soil more efficiently. The construction machine is equipped with an automated operating function so that even relatively inexperienced operators can use it, reducing human error and providing consistent quality without unevenness. During the fiscal year, trial construction using this method was conducted in Tochigi, Gunma and Miyagi prefectures, confirming constructability and quality across various soil types, including cohesive, sandy and gravelly soils. Various tests are currently under way to obtain technical review certification.」

「R&D expenses for the first nine months of the current fiscal year were ¥67 million, and there have been no material changes in the status of the Group's R&D activities. The consolidated subsidiaries have not conducted any significant R&D activities.」

「R&D expenses for the first six months of the current fiscal year were ¥38 million, and there have been no material changes in the status of the Group's R&D activities. The consolidated subsidiaries have not conducted any significant R&D activities.」

「R&D expenses for the first three months of the current fiscal year were ¥8 million, and there have been no material changes in the status of the Group's R&D activities. The consolidated subsidiaries have not conducted any significant R&D activities.」

「R&D expenses for the first nine months of the current fiscal year were ¥47 million, and there have been no material changes in the status of the Group's R&D activities. The consolidated subsidiaries have not conducted any significant R&D activities.」

「R&D expenses for the first six months of the current fiscal year were ¥32 million, and there have been no material changes in the status of the Group's R&D activities. The consolidated subsidiaries have not conducted any significant R&D activities.」

「R&D expenses for the cumulative first quarter were ¥12 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「Based on the results of field mixing tests using improved mixing blades, the company finalized the mixing-blade design for the actual machine. It conducted experiments in March on construction specifications, applicable soil types, and feasible construction depths. A quality confirmation survey was conducted in April, and standard construction specifications are scheduled to be finalized based on the results.」

「R&D expenses for the cumulative third quarter were ¥42 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「R&D expenses for the cumulative second quarter were ¥23 million, and there were no significant changes in the status of the group's R&D activities.」

「R&D expenses for the cumulative first quarter were ¥5 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「To support the use of large volumes of solidifying material with consistent quality in mechanical mixing work, the company introduced an overseas-made mixing plant, the MAT mixer, which is expected to produce a high-quality mix in a short time, and conducted mixing tests. The tests confirmed that a mix with the same quality, in terms of specific gravity and bleeding rate, could be produced in 1/18 the time required by a standard mixer, demonstrating the equipment's mixing efficiency. In addition to injection-control data such as injection pressure and the volume of chemicals injected, this system collects data from displacement gauges installed on nearby structures in the cloud and plots the data in real time as a 3D image, enabling users to monitor changing conditions on computers and tablets. For the time being, the company plans to apply the system to projects using the multi-point injection method developed for construction near structures, which limits displacement, and rock grouting technology. In the future, it aims to apply the system across ground improvement technologies, including mechanical mixing and high-pressure jet injection.」

「R&D expenses for the cumulative third quarter were ¥29 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「R&D expenses for the cumulative second quarter were ¥14 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「R&D expenses for the cumulative first quarter were ¥8 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「The company is developing a system to determine the bearing stratum during installation of small-diameter steel pipe piles. Research to date has shown that monitoring changes in rotational energy may make it possible to confirm the bearing stratum during installation. During the year, the company used changes in rotational energy as an indicator to confirm the bearing stratum at an actual construction site, and confirmed it at a depth almost identical to the assumed bedrock line. The company also developed a pile-head component that requires no on-site welding by using rings at the joints and conducted strength tests. The tests confirmed that the strength of the ring-equipped joints presented no issues. A demonstration test was conducted for a large-diameter, φ2400 mechanical mixing method using a BG machine. The test confirmed that there were no issues with constructability or quality. Based on the results, the company established the machine specifications, construction specifications, and applicable conditions.」

「R&D expenses for the cumulative third quarter were ¥41 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「R&D expenses for the cumulative second quarter were ¥35 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「R&D expenses for the cumulative first quarter were ¥5 million, and there were no significant changes in the status of the group's R&D activities. The consolidated subsidiaries did not conduct any significant R&D activities.」

「A deep mixing method using a BG machine as the base machine was introduced at construction sites, and its practicality was confirmed. Using a BG machine as the base machine makes both pre-drilling and ground improvement possible by changing only the front tool, while also improving the machine's mobility.」

「R&D expenses for the cumulative third quarter were ¥49 million, and there were no significant changes in the status of the group's R&D activities.」

「R&D expenses for the cumulative second quarter were ¥42 million, and there were no significant changes in the status of the group's R&D activities.」

「R&D expenses for the cumulative first quarter were ¥24 million, and there were no significant changes in the status of the group's R&D activities.」

「The group is actively promoting technical exchanges and joint development with universities, public institutions, private companies, and overseas companies, with the aim of refining its core technologies of drilling and grouting and developing new technologies, including applications and alliances centered on the environment, disaster prevention, and repair and maintenance.」