Saaske Works, a no-code business application development platform provided by InterPark Co., Ltd., has been adopted by Obayashi Corporation’s Koden ICJV Construction Office. The office has started operating a Corrective Report App that digitizes the full process from registering corrective instructions during daily site patrols to reporting, while consolidating and managing related information. By using mobile devices to connect the construction site and office in real time, the system enables the office to reliably carry out the safety management basics of “instruction → response → report,” even with limited personnel handling large volumes of information generated across the broad work area of a large-scale construction site. The goal is to manage operations efficiently while ensuring safety and quality. Large-scale sites generate many corrective instructions during daily patrols. Previously, the office used chat tools and similar methods to issue and report corrective instructions, but it faced issues such as mixed information, higher costs for checking and reviewing past communications, and a greater risk of missed responses. Because of the large volume of information, it was also difficult to systematically accumulate knowledge and prevent recurrence of similar issues. A mechanism was needed to grasp the overall situation, conduct regular reviews, and issue reminders. This initiative focuses on preventing information fragmentation and integrating data in one place so that even a large-scale site with limited personnel can reliably execute the safety management process of instruction, response, and report. Based on these site-level challenges, the office built the Corrective Report App using Saaske Works. Its goals include making information transparent by registering and sharing corrective instructions and reports in real time through mobile devices; centralizing information by managing instruction details, response reports, and current progress in a single dat