Climate Change

Greenhouse Gas

HOYA Strategy for CO2 Reduction

The HOYA Group is globally conducting its environmental protection activities, in which attempts are being made to reduce CO2 emissions by paying special attention to its "energy consumption."

CO2 Reduction Targets

The HOYA Group has been focusing its efforts on environmental protection activities, having set its CO2 emissions reduction target at achieving “a 5-percent reduction of CO2 emissions from fiscal 2016 by fiscal 2020 (compared with the level of fiscal 2014)."
Also, having set the HOYA Group's new medium-term target at achieving “a 16-percent reduction of CO2 emissions per unit of net sales from fiscal 2021 by fiscal 2025 (compared with the level of fiscal 2019)" as its target for the next five years, the HOYA Group is engaged in initiatives to reduce CO2 emissions by setting numerical targets and formulating action plans in each business with the aim of fulfilling the Group's target.

CO2 Emissions

In fiscal 2020, which was the final year for the medium-term target, the HOYA Group's CO2 emissions amounted to 406,176 tons. (Scope 1 and 2 emissions) CO2 emissions increased by 1.3% compared with the level in fiscal 2014, falling short of the target; however, we were able to reduce CO2 emissions per unit of net sales by 9.4%. We will continue to accelerate our initiatives so that we can successfully reduce not only CO2 emissions per unit of net sales but also total CO2 emissions.

CO2 emissions of the HOYA Group (t-CO2equivalent)

Scope 1 and 2 emissions Unit FY2014 (Base year) FY2015 FY2016 FY2017 FY2018 FY2019 FY2020 % change from the base year
Japan t-CO2 82,835 85,261 69,992 71,375 66,824 59,304 43,452 -47.5%
Overseas t-CO2 317,976 332,206 328,124 337,960 338,946 359,162 362,724 14.1%
Total t-CO2 400,811 417,467 398,116 409,335 405,770 418,466 406,176 1.3%
CO2 emissions per unit of net sales t-CO2 per billion yen 818 826 831 764 717 726 741 -9.4%

Note that the CO2 emissions are calculated, for each of the production bases*1, from the electric power and fuel consumptions as determined by the summation formulas standardized for the whole HOYA Group.
*1 Some non-production bases are included

Energy saving and power saving activities

At production bases, we are replacing facilities with energy-saving types (such as adopting ice thermal storage systems and high-efficiency transformers), conducting energy-saving activities (such as optimizing the operating hours of boilers and air-conditioning equipment) and promoting roof-greening, etc. We are also endeavoring to suppress CO2 emissions from non-production bases by such means as introducing casual wear, adjusting the indoor temperature appropriately and implementing efficient lighting in offices.

Examples of energy/power saving initiatives

  • Efforts to reduce greenhouse gas emissions at overseas offices using Joint Crediting Mechanism (JCM) (HOYA expects to cut annual CO2 emissions by 618 tons.)
  • In 2016, we introduced a heat recovery heat pump at the eyeglass lens plant in Vietnam. It is used to save energy and reduce CO2 emissions by using the heat that used to be expelled to the outside air when cold heat was supplied as a source of cold heat for the production process and as an auxiliary heat source for heating the water used in the manufacturing process. Before introducing the heat recovery heat pump, we used only electric heaters to obtain the desired temperature.

  • At the eyeglass lens plant in Vietnam, one of the existing centrifugal chillers was replaced with a highly efficient inverter centrifugal chiller. By using the new chiller for regular operation and the old one as backup equipment, we achieved a lower introduction cost, improved energy efficiency, and reduced CO2 emissions at the same time.
  • Introduction of renewable energy
    HOYA Vision Care ATC (Advanced Technology Center) Ramsey, which is one of our eyeglass lens business bases in the U.S., has been running on 100% renewable energy generated by solar and wind power since 2014. This has the effect of reducing approximately 3,800 tons of CO2 emissions per year.