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Nissui Construction Joins Forces for Himeji's Water Treatment Project

Nissui Construction Co., Ltd., headquartered in Shinjuku, Tokyo, is pleased to announce that it has secured a contract for the "Koyama Water Treatment Plant Renewal Project" through a collaborative entity that includes Taisei Corporation, Hamada Co., Ltd., Kubota Corporation, and Toshiba Corporation. The project is set to commence on April 12, 2025, in Himeji City, Hyogo Prefecture.

Background and Importance of the Project

The Koyama Water Treatment Plant has been serving Himeji City since its inauguration in 1970, marking approximately 50 years of operation. However, the facility is now facing challenges related to aging infrastructure and insufficient earthquake resistance.

As part of Himeji's Water Supply Vision, this project is positioned to fulfill the core objectives of being "resilient," "safe," and "sustainable," with a particular focus on enhancing the plant’s resilience. It aims to not only improve the earthquake-resistant features of the Koyama facility but also strengthen crisis management systems. Furthermore, the project will facilitate a stable and safe water supply in Himeji, promoting operational efficiency for sustainable water services.

Project Overview

Name of Project

Koyama Water Treatment Plant Renewal Project

Objective

Design and construction of a new water treatment facility. The new plant, designed to accommodate the same operational capacity as the existing one, will be built close to the current site with a maximum capacity of 60,000 m³/day.

Duration

The project will run from April 12, 2025, to March 31, 2031.

Contracting Methodology

The project will be executed using a Design-Build (DB) approach, ensuring seamless integration between design and construction phases.

Capacity

The nominal capacity is set at 60,000 m³ per day.

Contract Date

April 11, 2025.

Budget

The total project budget is approximately 24.7 billion yen (including tax).

Consortium Members

• - Taisei Corporation (Lead Company)
• - Hamada Co., Ltd.
• - Kubota Corporation
• - Toshiba Corporation
• - Nissui Construction Co., Ltd.

Nissui's Role in the Project

Nissui Construction will be responsible for both the basic and detailed design of the new water treatment plant. The company is committed to constructing a resilient facility that will deliver a safe and sustainable water supply, contributing significantly to the creation of a flourishing and sustainable future society.

Through this initiative, Nissui Construction aims to set new standards in water supply reliability and safety in Himeji, ultimately supporting the city in addressing present and future demands for clean water services.

As we move forward with this project, Nissui Construction stands dedicated to enhancing the quality of life through responsible and sustainable water management practices, paving the way for vibrant communities in Japan.