On March 13, 2023, at a boiler ash removal site in Niihama City, an employee of Tōyo Shōkai Ltd. fell approximately 22.1 meters and died. The site posed a risk of fall hazards, and it was extremely difficult to install barriers to prevent falls. The company and its site manager failed to take necessary measures, such as requiring the use of fall arrest equipment, to prevent falls and protect workers in areas where falls could occur. As a result, on December 18, 2023, they received a summary order of a fine from Saijō Summary Court for violations of the Industrial Safety and Health Act, and the sentence was finalized. This constitutes a violation of Article 28, Paragraph 1, Item 3 of the Construction Business Act.