Eco-factory

Tokyo Seimitsu is a machinery manufacturer that performs tooling 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. Accordingly, we are continuing efforts to reduce our usage of electricity and water.
Moreover, as the equipment has large numbers of mechanical parts and many paper drawings used for parts processing and assembly, we are working to use electronic data in processing and assembly to reduce the use of paper, among other initiatives to cut resource consumption. We are also making efforts to recycle metal processing scrap and waste liquid from processing as much as possible.
 We are undertaking efforts to reduce CO2 emissions from electricity used at plants by 35% compared to fiscal year 2018 by the end of fiscal year 2025, as a short-term target. For fiscal year 2021, we expect the CO2 reduction to be 30%.

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

Electricity and CO2
The greenhouse gases emitted by Tokyo Seimitsu consist primarily of 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. We are systematically switching to LED lighting, installing human detection sensors and solar panels, and upgrading to high-efficiency, energy-saving air-conditioners, compressors, and other equipment. 
To effectively achieve CO2 reductions, we adopted renewable electric power and low-carbon electricity in fiscal year 2020, and have confirmed a CO2 emissions reduction effect. We will make all possible efforts to reduce carbon and move closer to a carbon-free society.
●Tokyo Seimitsu's CO2 emissions

 
Previous five-year plan New five-year plan
FY2016
Performance
FY2017
Performance
FY2018
Performance
FY2019
Performance
FY2020
Performance
FY2021
Performance
Emissions (t-CO2) 12,176 12,311 12,312 11,976 9,524 8,240
Electric power used (kwh) 24,197 25,163 25,765 25,448 28,843 29,500
CO2 emissions equivalent
(t-CO2/million yen)
0.204 0.181 0.160 0.191 0.129 -



 
Other Gases
 
Tokyo Seimitsu also manufactures freezers that use HFC*4 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 coefficients.
As chemical substances that we use are also environmental pollutants, we properly manage these in accordance with relevant laws and regulations. To respond to emergencies such as leak accidents, we conduct emergency scenario training and work to address environmental pollution.

*4HFC: Hydrofluorocarbon. An alternative to CFCs.

 ●Atmospheric gas discharge(Unit: t-CO2
Other Gases FY2016 FY2017 FY2018 FY2019 FY2020
CH4 0.0 0.0 0.0 0.0 0.0
N2O 0.0 0.0 0.0 0.0 0.0
HFC 2.6 0.0 9.4 2.0 11.0
PFC 0.0 0.0 0.0 0.0 0.0
SF6 0.0 0.0 0.0 0.0 0.0

Promotion of Resource Conservation

Water
 

Our production volume of semiconductor manufacturing equipment that uses water is increasing. These use large amounts of pure water, and produce an increasing amount of wastewater. Tokyo Seimitsu collects and filters a portion of water that earlier had been discharged, for reuse in producing pure water.

The area of the Hachioji Plant, where we manufacture semiconductor manufacturing equipment, and the area of the Tsuchiura Plant, where we manufacture precision measuring instruments, are in the Low-Medium class of water stress according to the Aqueduct tools of the World Resources Institute (WRI). As a measure to reduce our amount of water usage, we are examining the reuse of wastewater discharged in the process of producing pure water, and are introducing equipment for this.

 ●Water consumption production volume intensity reduction plan and progress
Year set 2020 FY2020
Performance 
Starting fiscal year -
Target fiscal year
FY2020 - FY2024

Benchmark emissions
Reduction target
5% reduction compared to FY2019 by FY2024
2.74 (m3/million yen)
2.60 (m3/million yen)

2.29 (m3/million yen)
(16% reduction)

●Water usage

 
Previous five-year plan New five-
year plan
FY2016
FY2017
FY2018
FY2019
FY2020
Water usage(m3) 142,629 149,544 157,375 171,706  169,873
Water usage Production
volume intensity
(m3/million yen)
2.29 2.20 2.05 2.74  2.29




Paper
 

As paper uses many resources, including wood and water, we believe that reducing the amount of paper that we use will contribute to the conservation of the global environment. We are advancing initiatives to gradually create an environment in which every process in the Company can work using electronic data. We will continue making efforts toward reduction.

 ●Paper procurement volume production volume intensity reduction plan and progress
Year set 2020 FY2020
Performance 
Starting fiscal year -
Target fiscal year
FY2020 - FY2024


Benchmark
procurement volume

Reduction target
5% reduction compared to
FY2019 by FY2024
0.443(kg/million yen)

0.421(kg/million yen)

0.386(kg/million yen)
(13% reduction)
 ●Paper purchasing volume

 
Previous five-year plan New five-
year plan
FY2016
FY2017
FY2018
FY2019
FY2020
Paper purchasing
volume(kg)
29,827 31,159 30,800 27,766 28,622
Paper purchasing volume
Production volume intensity
(kg/million yen)
0.501 0.458 0.401 0.444 0.386
 

Waste Recycling

We are making efforts to reduce waste, such as replacing cardboard boxes used for packaging with reusable plastic boxes. All waste from the Hachioji Plant is recycled, by means including thermal recycling.

 ●Waste recycling plan and progress
Year set 2020 FY2020
Performance
Starting fiscal year -
Target fiscal year
FY2020 - FY2024
Target Recycling rate of 95% or
higher by FY2024
98.5%
(95% or higher)
 ●Waste recycling volume/rate

 
Previous five-year plan New five-
year plan
FY2016
FY2017
FY2018
FY2019
FY2020
Waste Recycling Volume (t) 1,157 831 1,010 905 872
Recycling rate (%) 96.3 98.3 99.1 98.6 98.5