Long-established Ise City waterworks company 'Sanshin Co., Ltd.' joins Nagoya HD Group: Connecting essential regional infrastructure to the next generation and building a corporate group that supports 'peace of mind' in the Tokai area

Nagoya Holdings Co., Ltd. (Headquarters: Marunouchi, Naka-ku, Nagoya, Aichi Prefecture; Representative Director: Hidekazu Hayashi; hereinafter 'Nagoya HD') is pleased to announce that as of March 11, 2026, it has acquired all shares of Sanshin Co., Ltd. (Headquarters: Ise City, Mie Prefecture; hereinafter 'Sanshin'), a company specializing in water facility construction and piping work, welcoming it into the group.

Connecting regional 'technology' and 'employment' to the next generation Currently, in the Tokai region, the survival of small and medium-sized enterprises with excellent technology is at risk due to the aging of management and a lack of successors. Sanshin, which has supported the water infrastructure of the Ise area for over half a century since its founding in 1972, was also exploring new paths for development with an eye toward maintaining its future organizational structure. Nagoya HD develops diversified businesses essential to regional life, including telecommunications, disaster prevention, education, labor, and funeral services. By welcoming Sanshin—which marks Nagoya HD's first foray into the 'waterworks business'—into the group, we will ensure that the skilled techniques built by Sanshin are not lost. Under a stable management foundation leveraging the group's organizational strength, we will continue to provide unwavering peace of mind to the local community.

Sanshin Co., Ltd.

'Management support and on-site efficiency' provided by Nagoya HD Nagoya HD backs up the HR, accounting, general affairs, and legal operations of each group company, creating an environment where on-site employees can focus on their 'core areas of expertise.' Furthermore, by introducing systems to streamline on-site reporting and information sharing, we will strongly support the creation of a structure where engineers can work more easily and provide higher-quality services.

Comment from Hidekazu Hayashi, Representative of Nagoya HD "I am very pleased to welcome Sanshin, which has long protected the lifelines of the Ise area, as a new member of our group. By carefully inheriting the wonderful technology possessed by Sanshin and fusing it with our expertise in organizational management and operational efficiency, we will build an environment where all employees can work with even greater pride. We intend to continue working hand-in-hand with companies that support the infrastructure of the Tokai region to contribute to the revitalization of the local economy."

Future Outlook While respecting Sanshin's independence and regional brand, Nagoya HD will focus on recruiting and training engineers and strengthening the service network as an important base in the Mie Prefecture area. By carefully connecting businesses that are needed by local people one by one, we aim to become the most trusted corporate group in the Tokai area.

【Overview of Sanshin Co., Ltd.】 Representatives: Satoshi Yamashita (Chairman of the Board), Hajime Kawai (President and Representative Director) Location: Ise City, Mie Prefecture Founded: October 1972 Business Description: Water facility construction, piping work, and comprehensive water supply and drainage equipment installation.