TOP Sustainability Environment
Climate Change

Climate Change

For many years, Tokyo Seimitsu has set its own targets and worked to conserve energy at its production sites, the Hachioji and Tsuchiura plants. In order to achieve the reduction targets required of signatories to the Paris Agreement and the 2030 target for reducing greenhouse gas emissions set by the Japanese government on April 22, 2021, we have set new medium- and long-term reduction targets for CO₂ emissions for energy used and consumed at both plants (Scope1 and Scope2), including for business activities, production activities, and research and development.
To achieve these targets, we are working to decrease electricity consumption by using electricity derived from renewable and low-carbon sources, and switching to high-efficiency equipment. Results are inspected and evaluated.

CO₂ Emission Reduction Targets

By fiscal 2025, reduce CO₂ emissions by 35% from 2018 levels
By fiscal 2030, reduce CO₂ emissions by 50% from 2018 levels

Fiscal 2022 Targets and Results

CO₂ Emissions

  FY2018 FY2019 FY2020 FY2021 FY2022
Total CO₂ emissions
 (Scope1 and Scope2)
12,312t-CO₂ 11,982t-CO₂ 9,524t-CO₂ 8,191t-CO₂ 8,257t-CO₂
CO₂ emissions production volume
intensity (Scope1 and Scope2)
 ( t-CO₂ / million yen)
 ( t-CO₂ / million yen) 
 ( t-CO₂ / million yen)
 ( t-CO₂ / million yen) 
 ( t-CO₂ / million yen) 
Details Gas 21t-CO₂ 21t-CO₂ 42t-CO₂ 51t-CO₂ 54t-CO₂
Fuel 65t-CO₂ 51t-CO₂ 33t-CO₂ 43t-CO₂ 45t-CO₂
Electricity 12,226t-CO₂ 11,910t-CO₂ 9,449t-CO₂ 8,097t-CO₂ 8,158t-CO₂

Scope1:Direct GHG emissions by the Company (emissions from fuel combustion, on-site power generation, and industrial processes) 
Scope2:Indirect emissions resulting from the use of electricity and heat supplied by other companies (e.g. emissions associated with electricity purchased from electric power companies) 

Eco-Factories (environmentally-friendly factories)

Objectives Plans Result (FY2022)
Reduction of CO₂ emissions 35% reduction compared to FY2018 by FY2025 
 Year set :2021
 Period :FY2020 to FY2025
 Benchmark emissions:12,312t-CO₂
  Reduction target : 8,003t-CO₂
8,257 t-CO₂
(33% reduction compared to FY2018)
Promotion of energy
(reduction of electricity use)
140 MWh
Reduction through Environmental Management System programs
Reduced energy use by 238 MWh

Eco-products (environmental contribution through products)

Objectives Plans Result
Development of
environmentally friendly
Environmental impact assessment based on LCA  Higher throughput
Extended temperature range during
Reduced electricity consumption

For details on Life Cycle Assessment (LCA) during product development and specific product information, please refer to “Environmental Contribution through the Provision of Products” 

Eco-Factory (Environmentally-Friendly Factories)

We are a machinery manufacturer that performs processing of precision parts in-house. Over 99% of the energy that we consume consists of power for our production plants, and the amount of water that we use for cutting and processing is considerable as well. Production volume is increasing for products that process semiconductors using water, as is the volume of water used for inspection, adjustment, test processing, and other work. We are striving to reduce the consumption of electricity and water. Moreover, as the equipment has large numbers of mechanical parts and many paper drawings are used for parts processing and assembly, we are working to use electronic data in processing and assembly to reduce the use of paper. We are also striving to recycle metal processing scrap and waste liquid from processing as much as possible. 

Eco-products (Environmental contribution through Products)

In order to respond to climate change, Tokyo Seimitsu is working on the development of environmentally friendly products. In addition to conducting an LCA as a mandatory task during new product development screening, we also evaluate the environmental impact of conventional products. We have established “eco-products” as products that are developed, manufactured, and improved according to LCAs. As a responsible manufacturing company, we contribute to the realization of a decarbonized society.

Promotion of Global Warming Prevention (Toward a Carbon-Free Society)

Almost all the greenhouse gases emitted by the Company are from the CO₂ equivalent of electricity purchased and used in the operation of the Hachioji Plant and Tsuchiura Plant. As a global warming prevention measure, we are focusing on conserving electricity.

Specific Examples of CO₂ Emission Reduction

Installation/maintenance of solar power generation facilities

Procurement of renewable electric power*¹

Switch to/introduction of low-carbon electricity/CO₂-free electricity*² (Hachioji Plant and Tsuchiura Plant)

Installation/maintenance of solar power generation facilities (Hachioji Plant and Tsuchiura Plant) 

Electricity generated from renewable energy sources

Electricity that is generated without CO₂ being emitted. This refers to electricity that is virtually CO₂-free, utilizing environmental value derived from renewable energy sources that do not emit CO₂

Specific Examples of Efforts to Promote Energy Conservation

Introduction/operation of high-efficiency machining centers

Replacement of wastewater treatment relay tank relay pumps (motor and pump sections) with energy-saving models

Replacement of pure water intermediate tank pumps with energy-saving models

Upgrade of water chillers to make them more energy efficient

Upgrade of air conditioning equipment (Hachioji ACCT Tower)

Air conditioning optimization (Metrology Company inspection rooms) 

Upgrade to equipment that generates less CO₂ emissions (approx. 50 million yen was spent on these upgrades)

Switch to LED lighting(Hachioji: ACCT Tower, Plant No. 3 and No. 5)

>Air conditioning upgrade (Hachioji: ACCT Tower, Plant No. 1)

Expansion of HV/EV vehicle introduction and installation of fuel-efficient tires

Management of Environmental Impact on the Atmosphere

The Company also manufactures freezers that use HFC* gases, for use in semiconductor manufacturing equipment. We properly manage the refrigerant gas, discharging almost no gas to the outside. We are also switching to gas refrigerants that have low global warming potentials.


Hydrofluorocarbons (HFCs) do not contain chlorine atoms that deplete the ozone layer and are therefore used as chlorofluorocarbon substitutes in air conditioners and other coolants.

Atmospheric gas discharge

Unit: t-CO₂

Other Gases FY2018 FY2019 FY2020 FY2021 FY2022
CH₄ 0.0 0.0 0.0 0.0 0.0
N₂O 0.0 0.0 0.0 0.0 0.0
HFC 9.4 2.0 11.0 0.0 0.0
PFC 0.0 0.0 0.0 0.0 0.0
SF₆ 0.0 0.0 0.0 0.0 0.0

Scope : Hachioji Plant, Tsuchiura Plant


TOP Sustainability Environment
Climate Change