Preventing Global Warming
A considerable amount of CO2 is emitted during the cement manufacturing process, of which 40% is energy derived and 60% is derived from the decarbonation of limestone, the main raw material. Therefore, while it is theoretically possible to reduce energy-derived CO2 emissions to zero by switching to clean energy, there is a major challenge in that CO2 emissions from raw materials cannot be reduced to zero as long as limestone is used.
To contribute to the prevention of global warming and achieve sustainable growth, we have set forth our "Carbon Neutral Strategy 2050," which includes 2030 interim targets, and are promoting CO2 emission reduction measures from a medium- to long-term perspective.
Based on our "Carbon Neutral Strategy 2050" we have established a project team (currently the Carbon Neutral Technology Development Department) to work on achieving carbon neutrality as a growth strategy and are promoting the development and practical application of innovative technologies that contribute to carbon neutrality.
Furthermore, under the Carbon Neutral Strategy Committee, we have established five working groups (2030 WG, Medium- to Long-Term WG, Finance WG, CCS WG, and CN Plant WG) as crossorganizational groups to promote activities toward achieving our goals.
In order to achieve our interim goals for 2030, which are "reducing specific CO2 emissions by 20% or more across the entire supply chain compared to 2000" and "reducing CO2 conservation, fossil fuel substitution and expansion of the use of supplementary cementitious material, development of low-CO2 cement, and completion of the development of CO2 recovery and utilization technologies. emissions in Japan by 40% or more," we have set goals for energy
Reducing CO2 Emissions during Transportation
We contract the delivery of our raw materials, fuels and products to transportation companies and are striving to reduce CO2 emissions as a specified consigner designated under the Act on Rationalizing Energy Use. As part of our key initiatives, in the trucking division we are encouraging the planned implementation of round-trip transportation and ecodriving, as well as the introduction of energy-saving equipment such as digital tachometers and eco-tires for each vehicle. In shipping, we operate new ships that are equipped with various energy-saving features. We are also supporting energy-saving operations for conventionally powered ships.
Our FY2024 CO2 emissions were appoximately 2% lower than in FY2023.
| Mode of transportation | Transportation volume (thousand t) |
Average distance transported (km) |
Transported tonne-kilometers (thousand t/km) |
CO2 emissions (thousand t) |
| Ship | 15,955 | 502 | 8,013,408 | 108 |
| Truck | 12,135 | 61 | 741,154 | 41 |
| Railway | 4,864 | 26 | 125,322 | 3 |
| Total | 32,954 | 269 | 8,879,884 | 152 |
| KPIs and targets | FY2022 | FY2023 | FY2024 |
| Delivering carbon neutrality (2030 Interim Targets) Reduce specific CO2 emissions*1 by at least 20% (compared with 2000) |
9.7% | 10.5% | 11.6% |
| Reduce domestic CO2 emissions*2 by 40% or more (compared with 2000) | 36.0% | 42.7% | 46.8% |
*1 Scope 1 (excluding fossil energy substitution) + Scope 2 + Scope 3 (Categories 1, 3)
*2 Scope 1 (excluding fossil energy substitution) + Scope 2
(Note) Calculation results were reviewed and retroactively revised
Specific CO2 emissions in Scope 1+2 decreased compared to the previous fiscal year. We have achieved an 11.6% reduction toward our 2030 goal of reducing CO2 specific emissions by 20% or more across the entire supply chain (compared to 2000).
We are also promoting the examination of appropriate evaluation methods for the CO2 reduction effect through concrete absorption in cooperation with the GCCA.
(Note) Calculation results were reviewed and retroactively revised
*3 For Scope 3, refer to the "Emissions Unit Values for Accounting of Greenhouse Gas Emissions, etc., by Organizations Throughout the Supply Chain (Ver. 3.2) Ministry of the Environment" and the "LCI Database IDEA version 3.2 (before FY2023), version 3.4 (FY2024)."
*4 Excluding Scope 3
Emissions decreased due to the decrease in coal consumption resulting from the increase in fossil fuel alternatives and the decrease in cement production volume, and we exceeded our 2030 interim target of reducing total domestic CO2 emissions by 40% or more (compared to 2000).
Environmental Accounting by Project
— Introduction of Gas Engine Power Generation Equipment at the Saitama Plant
Gas engine power generation equipment uses an internal combustion engine that burns gaseous fuels such as city gas, and generates electricity by converting the driving force obtained from combustion into electrical energy.
In FY2024, we introduced two 7,800 kW gas engine power generation units at the Saitama Plant, the second case for our domestic plants. This power generation equipment is state-of-the-art equipment with high power generation efficiency and excellent environmental performance, and the introduction of this equipment enables stable availability of electric power necessary for operation and the use of energy-saving and low-CO2 emission electric power. We will continue to aim for further CO2 reductions and reductions in our environmental impact.
Gas engine power generation facility at Saitama Plant
Investment amount:
Approx. 36 billion yen
Reduction in CO2 emissions:
5,809 tonnes/year
