The TSUNEISHI Group is pursuing various initiatives to make its energy use more efficient and contribute to a decarbonised and recycling-oriented society.

The Tsuneishi Factory of TSUNEISHI SHIPBUILDING has switched to LED lighting, set up power consumption monitoring, and optimized operations using digital technology. It has succeeded in significantly reducing its power consumption, achieving an approximately 28% reduction in FY2024 compared to FY2019 levels. Similar initiatives are underway at other Group facilities in Japan and overseas, which, combined with improvements to production processes, have resulted in significant reductions in power consumption.

The Fukuyama Factory of TSUNEISHI KAMTECS generates energy by incinerating industrial waste. It captures this thermal energy to produce high-pressure steam, which is piped to steam turbines to generate electricity. This provides power for the plant and completes the energy recycling process. Approximately 80% of the factory’s power consumption is derived from this recycled energy, effectively reducing CO₂ emissions by making efficient use of operational processes.

The TSUNEISHI Group consumes a total of about 180,000 MWh of electricity annually. To help promote decarbonisation, the entire Group is working to generate its own electricity using technology such as solar power.

At each factory, the Group is making use of available roof space by installing solar panels. At the TSUNEISHI Group (ZHOUSHAN) SHIPBUILDING factory in Zhoushan, China, a solar power system was installed in 2017 and was expanded in January 2023. With a maximum output of 23 MW and an annual output of 24,000 MWh, it is one of the largest rooftop solar power systems in Zhejiang Province.

In July 2025, a rooftop solar power system was also installed at TSUNEISHI SHIPBUILDING’s base in the Philippines, TSUNEISHI HEAVY INDUSTRIES (CEBU), Inc. (hereafter, THI). This project is a joint solar-power initiative between THI and TSUNEISHI HOLDINGS (Cebu), Inc., with a total capacity of 3MW, and will be implemented in two separate phases. In the first phase, 1.1MW of solar panels were installed at the company office and employee dormitories, and the power generated is being used by the THI factory. In the second phase, new solar power systems will be installed in parking areas and other facilities, with completion targeted for 2026.

Combining the output from solar panels installed at each factory, the solar power station owned by TSUNEISHI CORPORATION in Omishima Island in the Seto Inland Sea, and the TSUNEISHI KAMTECS waste-to-energy system, the Group generates 55,000 MWh of electricity in-house, equivalent to approximately 24% of total Group power consumption.

We are also considering installing high-efficiency energy-saving equipment, along with new solar power systems at both Japanese and international sites. In the future, we will continue to promote initiatives for energy efficiency and renewable energy, aiming to cover all of our business sites’ electricity needs with renewable energy.