Initiatives for Reducing Environmental Impact

Prevention of Global Warming

As climate change progresses, the Tsubaki Group is working to reduce its CO2 greenhouse gas emissions.
We have established “Targets for Reducing Total CO2 emissions” as our mid-and long-term environmental targets, and are promoting specific initiatives based on our voluntary environmental action program.
Much of the energy used in the Group’s manufacturing is concentrated in the production process. We are therefore improving energy efficiency by proactively installing energy-saving production equipment while promoting the application of insulating paint coating for major plants and the conversion from heavy oil in air-conditioning equipment to liquefied natural gas and other fuels that have lower CO2 emissions. Further, when building or renovating plants, we carry out a host of CO2 reduction measures, such as expanding our use of renewable energy by proactively installing solar power generation equipment and adopting LED lighting.

Targets for Reducing Total CO2 emissions
FY2025 FY2030
Domestic business sites
(compared to FY2013)
30% 46%
Overseas business sites
(compared to FY2018)
20% or more 30% or more

Activities Meant to Reduce Total CO2 Emissions

In FY 2020, the total CO2 emissions of the Tsubaki Group were as follows.
In Japan, we developed our long-term plan to reduce CO2, the 2030 Roadmap for CO2 Reduction in accordance with the long-term environmental goals of our group companies. Consequently, we were able to achieve a reduction in CO2 emissions by 9.8% compared to the previous fiscal year.
In addition, we achieved 51% (CO2: 23.4% reduction) compared to the long-term target for FY 2030 (CO2: 46% reduction).
Overseas, we referred to the data from FY 2017 at 14 major manufacturing bases in North America, Europe, and Asia.

Total CO2 Emission Trend Scope 1
(CO2 Directly Emitted In-House, Such as from Fuel Consumption)

  • CO2 emissions by location (domestic)
    CO2 emissions by location (domestic)
  • CO2 emissions by location (global)
    CO2 emissions by location (global)

Total CO2 Emission Trend Scope 2
(CO2 Indirectly Emitted In-House, Such as from Use of Electricity)

  • CO2 emissions by location (domestic)
    CO2 emissions by location (domestic)
  • CO2 emissions by location (global)
    CO2 emissions by location (global)

Total CO2 Emission Trend Scopes 1 and 2

  • CO2 emissions by location (domestic)
    CO2 emissions by location (domestic)
  • CO2 emissions by location (global)
    CO2 emissions by location (global)

 CO2 emissions factors for domestic power use are the “alternative value” of the “emission coefficient by electric utility” published by the Ministry of the Environment.
CO2 emissions factors for overseas power use are the 2018 CO2 emissions factors given in the International Energy Agency (IEA) Emissions Factors (2020 edition).

Contribution to a Circular Economy

The Group is advancing initiatives designed to realize a circular economy with a low environmental impact by creating higher economic value through the reduced use of water and other resources while promoting the reduce, reuse, recycle (“3R”) approach.

Reducing Total Weight of Waste Discharged

The Tsubaki Group has set not only the reduction of waste (both industrial and general waste) and the improvement of the recycling rate, but also the total weight of waste discharged, which includes recyclables traded for sale, as the management indicator in accordance with Four Principles and Eight Items of Sustainability. We are striving to fundamentally reduce the volume of materials extracted from the earth’s crust in the natural world, which is one of the management indicators of the Tsubaki Group's EcoFactory Certification System.

List of Total Weights of Waste Discharged, Broken Down by Facility

Unit: t/year

FY 2019 FY 2020
All Waste Sale of Valuable Resources Total Waste Discharged All Waste Sale of Valuable Resources Total Waste Discharged
Tsubakimoto Chain Kyotanabe Plant 582 8,390 8,971 456 7,412 7,867
Saitama Plant 2,295 9,250 11,545 1,519 7,650 9,168
Hyogo Plant 109 19 128 127 6 132
Nagaokakyo Plant 318 883 1,201 286 674 960
Okayama Plant 481 383 864 427 303 730
Domestic subsidiaries Tsubakimoto Custom Chain 181 850 1,031 150 719 869
Tsubakimoto Sprocket 123 426 549 102 303 405
Tsubakimoto Bulk Systems 27 185 213 23 215 237
Tsubakimoto Mayfran 61 762 823 53 476 529
Tsubakimoto Iron Casting 1,788 36 1,825 1,446 28 1,474
Tsubaki Yamakyu Chain 52 70 123 57 85 142
Domestic total 6,018 21,254 27,272 4,645 17,869 22,514

Note: All waste = Industrial waste + General waste

List of Figures

Total waste discharged/Unit
FY 2019 FY 2020
Tsubakimoto Chain Kyotanabe Plant 0.480 0.472
Saitama Plant 0.359 0.340
Hyogo Plant 0.293 0.250
Nagaokakyo Plant 0.102 0.108
Okayama Plant 0.293 0.127
Domestic subsidiaries Tsubakimoto Custom Chain 0.214 0.195
Tsubakimoto Sprocket 0.181 0.176
Tsubakimoto Bulk Systems 0.065 0.064
Tsubakimoto Mayfran 0.267 0.247
Tsubakimoto Iron Casting 1.325 1.283
Tsubaki Yamakyu Chain 0.043 0.058
Domestic total 0.309 0.300

Note: Total waste ÷ Production

Improvement of Recycling Rate

The Tsubaki Group takes a proactive approach to reducing and recycling waste. In FY 2020, the combined total amount of industrial and general waste emissions was 4,645 tons, representing a decrease of 22.8% year-on-year.
The recycling rate remained high at an annual average of 96.7%.

  • Waste Emission and Recycling Rate (Fiscal Year Average)

    Unit: t, %

    2016 2017 2018 2019 2020
    Industrial waste 6,090 6,462 6,452 5,573 4,300
    General waste 517 470 440 445 345
    Recycling rate
    (annual average)
    98.7 98.7 97.9 97.6 96.7
  • Waste Emission and Recycling Rate

    Waste Emission and Recycling Rate

     The scope of the report is 11 major manufacturing sites in Japan; overseas data is not included, as the definitions of disposal operations differ from country to country.

Reducing Water Consumption

To protect water resources, the Tsubaki Group is working to reduce total water consumption and water consumption per unit of production on a global level. At our Japanese sites, we have set a management value for each site as a management indicator for the EcoFactory Certification System, and are working to reduce water consumption. In addition, we have begun measuring water consumption at our overseas sites since FY 2017, and we have been taking measures to reduce it.

  • Water consumption (domestic)
    Water consumption (domestic)
  • Water consumption (global)
    Water consumption (global)

Coexistence with Nature

Modern society is maintained by receiving a variety of ecosystem “services” from nature, including circulation and regeneration of materials in the atmosphere, water, and soil. The Tsubaki Group contributes to the protection of the ecosystem by reducing our environmental impact through our manufacturing and products that are in harmony with the global environment. We are also reducing the use of hazardous chemical substances in our production activities to reduce the risk that such substances pose to the natural environment. Furthermore, we are striving to improve the environment and conserve the ecosystem by directly cooperating with the environmental conservation activities taking place all around us in our day-to-day business.

Initiatives to Reduce the Use of Hazardous Chemical Substance

Based on domestic and international legislation concerning hazardous chemical substances, the Tsubaki Group is investigating substances contained in raw materials, parts, and other materials. By also working together with our customers to gain an understanding of the actual details regarding the usage of hazardous chemical substances and to establish permissible levels, we are continually striving to reduce the use of such substances.
In our Green Procurement Guidelines, we require our suppliers to reduce the use of hazardous chemical substances by specifying the applicable laws and regulations, names of substances, standard values, etc.

Laws and Regulations Compliant Products
RoHS directive
(2011/65/EU)
General-purpose drive chains, lube-free drive chains, powerful drive chains, corrosion resistant drive chains, cable carrier plastic series, cable carrier steel series, Cleanveyors, Flatveyors, locking devices, and shaft couplings (except roller chain couplings)
RoHS directive
(2002/95/EC)
Gear motors, gear boxes, power cylinders, jacks, electric overload protectors, control equipment, machine protective equipment, clutches, shaft couplings (roller chain couplings)
ELV directive All components for automotive engine timing chain systems

* RoHS directive: An EU directive regulating the use of certain hazardous substances in electrical and electronic equipment.
2002/95/EC (RoHS 1) was promulgated in February 2003 and 2011/65/EU (RoHS 2) was promulgated in July 2011.

* ELV directive: An EU directive restricting the use of lead, mercury, cadmium, and hexavalent chromium as a general rule to reduce waste from end-of-life vehicles (ELVs) and encourage appropriate disposal.

Promoting the Reduction of the Use of Chemical Substances Subject to the PRTR Law

The Tsubaki Group surveys emissions of chemical substances specified by the Chemical Substance Removal Management Promotion Law (PRTR Law) and continuously works to reduce such substances and switch to less hazardous substances.
In FY 2020, the Group’s annual PRTR report discovered such substances in seven plants at four companies. The Tsubaki Group has set PRTR control as a management indicator for the EcoFactory Certification System, and is working to reduce the use of strictly controlled substances at plants that are not subject to reporting under this system.

FY 2020 data on chemical substances subject to the PRTR Law

Unit: kg/year

Location Substance No. Substance Name Amount Released Amount Transferred Total
Atmosphere Public Water Supply Soil On-site Landfill Sewer Transferred to Off-site Business
Tsubakimoto Chain Kyotanabe Plant 348 1-bromopropane 8,700 0 0 0 0 0 8,700
Saitama Plant 87 Chromium and chromium (III) compounds 50 0 0 0 0 25,170 25,220
300 Toluene 24,643 0 0 0 0 9,972 34,615
Hyogo Plant 438 Methylnaphthalene 4 0 0 0 0 0 4
Nagaokakyo Plant 53 Ethylbenzene 746 0 0 0 0 273 1,019
80 Xylene 1,254 0 0 0 0 460 1,713
300 Toluene 6,715 0 0 0 0 2,462 9,177
Tsubakimoto Bulk Systems 53 Ethylbenzene 4,760 0 0 0 0 240 5,000
80 Xylene 10,760 0 0 0 0 540 11,300
300 Toluene 1,900 0 0 0 0 100 2,000
438 Methylnaphthalene 1 0 0 0 0 0 1
Tsubakimoto Mayfran 53 Ethylbenzene 1,000 0 0 0 0 390 1,390
80 Xylene 1,500 0 0 0 0 600 2,100
300 Toluene 9,700 0 0 0 0 3,700 13,400
Tsubakimoto Iron Casting 412 Manganese and its compounds 2,734 0 0 0 0 0 2,734
Magnesium and its compounds 1,679 0 0 0 0 0 1,679
Total 76,146 0 0 0 0 43,906 120,053

* Tsubakimoto Custom Chain, Tsubakimoto Sprocket, and Tsubaki Yamakyu Chain are outside the scope of PRTR filing.
Note 1: The table above shows the figures compliant to laws and regulations.

Greening Initiatives in Factories

At the Tsubaki Group, we are focusing on expanding green areas and environmental facilities at 11 domestic sites. As of the end of March 2021, the greening rate based on the area of green space and the total greening rate based on the area of green space plus the area related to environmental facilities are shown in the table below.

List of Factory Greening Rates (Based on Factory Location Act)

As of March 31, 2021

[Unit: m2]

Total Site Area Green Area (1) Greening Rate Environmental facility area (2) Green Area (1) and Environmental Facilities (2) Total Greening Rate
11 locations in Japan Total 670,426 146,980 21.9% 37,917 184,877 27.6%

* Environmental facilities: Facilities other than green areas, such as squares, fountains, and solar power generation.

Toward a Sustainable Society

The Tsubaki Group is engaged in the “art of moving” and aims to provide value that exceeds expectations
to become a company that continues to be needed by society.