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This document is the Information Security Basic Policy of Matsui Construction Co., Ltd. The company recognizes information security assurance as an important management issue and commits to protecting its information assets through organizational and technical measures. The policy outlines four key initiatives: protecting information asset confidentiality, integrity, and availability; complying with relevant laws and regulations; implementing employee education and training; and continuously improving security measures and management systems. The policy was established on April 1, 2017.