On May 29, 2023, at a construction site in Oita Prefecture, an employee of N.S.O. Ltd. sustained an injury or illness during work and was absent for more than four days. Despite this, the company and its representative failed to submit the required worker injury and illness report to the Oita Labor Standards Inspection Office by October 14, 2025, as mandated by law. They each received a summary order of a 200,000 yen fine from the Oita Summary Court for violating 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.