Advancing Renewable Energy Utilization and Energy Efficiency Initiatives at the Tsukuba Plant
Komori Corporation (Sumida-ku, Tokyo; President and CEO: Satoshi Mochida) announces that it has installed and commenced operation of a large-scale solar power generation system and air-cooled heat pump chillers for air-conditioning at its Tsukuba Plant (Tsukuba City, Ibaraki Prefecture). This initiative is based on Komori’s long-term environmental vision, the “Komori Eco Vision,” and aims to reduce environmental impact through the use of renewable energy and energy-saving measures.
1. Background and Objectives
To address global warming and achieve a sustainable society, Komori is promoting the use of renewable energy and energy-saving measures across its global group. Under this policy, the Tsukuba Plant has introduced power generation systems and air-conditioning heat source equipment as part of its efforts to reduce CO₂ emissions.
2. Overview of Large-Scale Solar Power Generation System
At the Tsukuba Plant, a large-scale solar power generation system with a capacity of 1,800 kW was introduced under an on-site PPA*1 model and has been in full operation since April 1, 2026. Combined with the existing system (500 kW) installed in 2016, the use of renewable energy at the plant has been further expanded.
Benefits of the Solar Power Generation System:
- Power generation capacity: 1,800 kW (2,300 kW including the existing system)
- Estimated annual power generation: approximately 2 million kWh (approximately 2.6 million kWh including the existing system)
- Estimated annual CO₂ emissions reduction: approximately 860 tons*2 (approximately 1,100 tons including the existing system)
- Renewable energy ratio in total plant electricity consumption: approximately 21% (including the existing system)
*1 On-site PPA:
A system in which a power generation company installs, owns, and operates solar power facilities on the premises of a host company, which purchases the generated electricity over the long term.
- Power generation company: Tokyo Gas Engineering Solutions Corporation (TGES)
- Installation site: Komori Corporation
*2 CO₂ emissions are calculated using the location-based emission factor for FY2025.
3. Overview of Air-Cooled Heat Pump Air-Conditioning System
The air-conditioning heat source equipment at the Tsukuba Plant has been upgraded from conventional gas absorption chillers to air-cooled heat pump modular chillers, with operation commencing in late January 2026.
This upgrade represents the second unit installed following the initial installation in 2018 and contributes to further reductions in gas consumption and CO₂ emissions.
Benefits of the Air-Conditioning Heat Source System:
- Annual gas consumption reduction: approximately 200,000 m³ (approximately 45% reduction compared to FY2024)
- Estimated annual CO₂ emissions reduction: approximately 310 tons*3
*3 CO₂ emissions are calculated using the location-based emission factor for FY2025.
5. Group-Wide Initiatives
Across the Komori Group, the use of renewable energy and energy-saving measures are being promoted not only at the Tsukuba Plant but also at production sites in Japan and overseas.
Overseas, Komori Machinery (Nantong) Co., Ltd., a production site in Nantong, China, introduced a solar power generation system with a capacity of 880 kW in 2025 and is expected to achieve an estimated annual CO₂ emissions reduction of approximately 530 tons.
In addition, MBO Postpress Solutions GmbH, a group company engaged in the manufacture and sales of postpress equipment, has introduced solar power generation systems at its factories in Germany and Portugal, achieving an estimated annual CO₂ emissions reduction of approximately 116 tons.
The initiatives at the Tsukuba Plant are positioned as part of these group-wide environmental efforts.
6. Future Initiatives
Komori will continue to promote the use of renewable energy and energy-saving measures at its production sites in Japan and overseas, contributing to reducing environmental impact and achieving a sustainable society.
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