Keisei Construction Co., Ltd

Keisei Construction Co., Ltd. is a Japanese construction enterprise that operates under the aliases 京成建設株式会社, Keisei Construction Co., Ltd., and Keisei Kensetsu Kabushiki Kaisha. The company’s headquarters is located in Japan. As indicated by its name, the organisation’s primary activity involves construction‑related work. The firm conducts its operations mainly within the Japanese market, reflecting its domestic headquarters and registration. It is recognised locally by its Japanese name and internationally by its English translations. No further details about the scale of its workforce, annual revenue, or geographic reach are provided in the available sources.

In April 2022, Keisei Construction Co., Ltd. reported an unauthorized access incident affecting its network infrastructure. The incident was disclosed through a notice posted on the company’s website, which outlined steps for users to restore connectivity. Advised actions included verifying physical network connections, restarting routers and modems, and adjusting firewall or antivirus settings to permit Chrome access. Users were also instructed to reconfigure proxy server settings via browser controls or to disable proxy use entirely for local networks if it was unintended. The company’s response focused on device reboots and network configuration checks rather than detailing the attack’s origin or any broader operational consequences. No further technical specifics or impact assessments were provided in the public notice.