Taisei Expands Use of Its T-iROBO Welding On-Site Robotic Welding Method

The Nikkei reported on November 13, 2026, that Taisei is promoting wider use of its T-iROBO Welding on-site robotic welding method. We have not been able to verify the information against primary sources, so please consult the original report for details.

Taisei says it has strengthened its fleet of robots and trained more trainers, enabling simultaneous operation at multiple large-scale sites. Its parallel efforts to expand the method’s range of applications and build an operational support structure suggest that companies considering on-site welding automation need to assess not only which components can be handled, but also the capacity to deploy the technology at job sites.

The key point is that Taisei is expanding the range of applications for its welding robots while building the capacity to operate them at multiple sites. Extending the method from square steel-tube columns to box-section and circular steel-tube columns points to automation moving beyond components of a single type to columns with different shapes. Meanwhile, increasing the number of robots and training specialists to support on-site work shows that putting the technology into practice requires not only equipment but also a team to deploy and operate it. The reported information, however, does not allow for a comparison of application requirements or construction quality across component types. In related coverage of construction robotics, Taisei and EYSING develop AI for autonomous shield-machine operation, with trial error within 3 mm covered directional control of shield machines. Taisei reports automated generation of robot “maps” to ease automation burden covered the automated generation of maps for robots. These are separate reports and do not indicate a technical connection or shared platform with the welding method. Still, they show that different stages of construction—controlling machinery, enabling robots to recognize their work environments and carrying out welding—are each becoming targets for automation. The welding method is part of this trend in on-site work execution and operational scale. For the industry, the number of robots is only one consideration; the range of applicable components and the personnel needed to prepare each site also matter. Taisei cites higher productivity and a response to a shortage of skilled workers, but the report does not say how much construction time or staffing levels might change. Further details to watch include the number of sites and robots in operation, application requirements by component type, welding quality-control methods and the scale of trainer development. If this information becomes available, it will be easier to assess whether the expanded applications remain specific to individual sites or represent an operating model that can be replicated across multiple sites. Please consult the original report for details.