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 site
(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 2019, 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 7.4% compared to the previous fiscal year.
In addition, we achieved 33% (CO2: 15% reduction) compared to the long-term target for FY 2030 (46% reduction in total CO2 emissions compared to FY 2013).
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 “basic emission coefficient” of the “emission coefficient by electric utility” published by the Ministry of the Environment.
CO2 emissions factors for overseas power use are the 2016 CO2 emissions factors given in the International Energy Agency (IEA) Emissions Factors (2018 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 2018 FY 2019
All Waste Sale of Valuable Resources Total Waste Discharged All Waste Sale of Valuable Resources Total Waste Discharged
Tsubakimoto Chain

Kyotanabe Plant 637 9,426 10,062 582 8,390 8,971
Saitama Plant 2,478 11,240 13,717 2,295 9,250 11,545
Hyogo Plant 77 30 107 109 19 128
Nagaokakyo Plant 293 999 1,292 318 883 1,201
Okayama Plant 519 331 851 481 383 864
Domestic subsidiaries

Tsubakimoto Custom Chain 189 868 1,057 181 850 1,031
Tsubakimoto Sprocket 142 644 786 123 426 549
Tsubakimoto Bulk Systems 22 188 209 27 185 213
Tsubakimoto Mayfran 45 800 845 61 762 823
Tsubakimoto Iron Casting 2,446 84 2,530 1,788 36 1,825
Tsubaki Yamakyu Chain 44 59 103 52 70 123
Domestic total 6,891 24,668 31,560 6,018 21,254 27,272

Improvement of Recycling Rate

The Tsubaki Group takes a proactive approach to reducing and recycling waste. In FY 2019, the combined total amount of industrial and general waste emissions was 6,018 tons, representing a decrease of 12.7% year-on-year.

  • Waste Emission and Recycling Rate (Fiscal Year Average)

    Unit: t, %

    2015 2016 2017 2018 2019
    Industrial waste 5,199 6,090 6,462 6,452 5,573
    General waste 575 517 470 440 445
    Recycling rate
    (annual average)
    98.1 98.7 98.7 97.9 97.6
  • 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. 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
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
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 2019, 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 2019 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 4,100 0 0 0 0 0 4,100
Saitama Plant 87 Chromium and chromium (III) compounds 31 0 0 0 0 15,658 15,690
300 Toluene 27,724 0 0 0 0 11,346 39,070
Hyogo Plant 438 Methylnaphthalene 6 0 0 0 0 0 6
Nagaokakyo Plant 53 Ethylbenzene 1,013 0 0 0 0 371 1,384
80 Xylene 1,406 0 0 0 0 515 1,921
300 Toluene 9,009 0 0 0 0 3,302 12,311
Tsubakimoto Bulk Systems 53 Ethylbenzene 3,840 0 0 0 0 460 4,300
80 Xylene 5,980 0 0 0 0 720 6,700
300 Toluene 1,880 0 0 0 0 220 2,100
438 Methylnaphthalene 2 0 0 0 0 0 2
Tsubakimoto Mayfran 53 Ethylbenzene 1,500 0 0 0 0 470 1,970
80 Xylene 2,600 0 0 0 0 800 3,400
300 Toluene 13,000 0 0 0 0 4,000 17,000
Tsubakimoto Iron Casting 412 Manganese and its compounds 674 0 0 0 0 674 1,348
Magnesium and its compounds 2,616 0 0 0 0 2,616 5,232
Total 75,382 0 0 0 0 41,152 116,534

* 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 2020, 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, 2020

[Unit: m2]

Total Site Area Green Area (1) Greening Rate Environmental facility area (2) Green Area and Environmental Facilities (1) + (2) Total Greening Rate
11 locations in Japan
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.