Environmental ActivitiesRealize Sustainable Energy Use

The Kurita Group recognizes abnormal weather and natural disasters due to global warming and other climate change issues as a major social challenge to be addressed globally. One of the ways we are responding to climate change is taking steps to reduce our CO2 emissions by reducing our in-house per-unit energy consumption. At the same time, we are working to optimize energy use at our customers’ plants and business sites, and to promote the spread of energy-creating technologies.

Targets for 2022

The Kurita Group aims to achieve a reduction of environmental impact through its business that offsets and even exceeds the environmental impact generated by its business. To this end, we have set targets for the “amount of the reduction in environmental impact of customers - the amount of the Kurita Group’s own environmental impact” for fiscal 2019 onwards. We will continue to measure these actual values going forward values.

CO2 emissions reduction at customers
– CO2 emissions from our business activities


Contribution to SDGs

With Customers

Customers’ Environmental Improvement Activities

The graph shows the performance of CO2 emissions reduction at customers’ plants and business sites through proposals of the Company and its domestic Group companies.This mainly represents a reduction in fuel use by conversion to high-efficiency boilers and maintaining or improving heat efficiency in boiler and cooling water facilities.It also represents the impact of adopting inverters for rotating equipment in water treatment facilities.

Improvement Examples

Examples of Energy-Use Reduction at Paper Mills (Initiative by Kurita Water Industries Ltd.)

Per-unit Use of Steam Reduced by5to10

At paper mills, paper is created through a pulping process and paper-milling process. In the paper milling process, the water content is removed from the wet paper that will become the finished paper through application of pressure and a mechanical water removal process. After that, the paper is dried with a dryer and rolled up. The dryer used in this process is formed from a metal cylinder. The paper is spread over the surface, which is then heated. To heat the dryer, steam is passed through the interior. Heating accounts for most of the overall energy usage at the plants. Therefore, reducing the energy used in the process was an important challenge at paper mills.

Kurita Water Industries noted that water from the steam adhering to the inside of the dryer caused a drop in heat conduction efficiency. At many paper mills we have proposed adding a water treatment chemical that forms a water-repellent film to the steam, so that the film adheres to the inside of the dryer and improves heat conduction efficiency. Plants that have adopted this proposal are able to reduce their per-unit use of steam by around 5-10% per year on average, with the reduction in energy leading to a reduction in CO2 emissions.

Examples of Energy-Use Reduction at Daicel Safety Systems Inc. (Initiative by Kurita Water Industries Ltd.)

Electric power consumption Reduced by 44

Daicel Safety Systems Inc., which mainly produces inflators for car airbags, needed to improve the energy efficiency of its businesses activities in line with the Daicel Group’s Responsible Care Basic Policy.

For this customer, one of the issues was improving the energy efficiency and reducing energy use of its cooling water equipment for air conditioning. Kurita Water Industries proposed first removing scales that formed on the heat exchanger of the cooling water equipment and then inhibiting their formation using water treatment chemicals.

Having adopted these proposals, the Company reduced power use 44% by optimizing the heat exchange efficiency of the cooling water facilities, and it was possible to maintain those benefits.

Heat exchanger interior before the cleaning (left)
After cleaning (right)

Heat exchanger interior before the cleaning (left)After cleaning (right)

Comparison of electricity use before and
after proposal adopted

Comparison of electricity use before and after proposal adopted

Customer’s Voice

Mr. Kosuke Inoue

Mr. Kosuke Inoue
Production Engineering

We thought highly of Kurita Water Industries’ proposal because it was appropriate for the issues we faced and it was possible to dramatically reduce energy use as expected.
In the future, we expect to work with Kurita Water Industries to introduce the proposal horizontally throughout the plant and receive other proposals to improve the quality of industrial water.

Examples of Energy-Use Reduction at HGST Japan Ltd. (Initiative by Kurita Water Industries Ltd.)

Electric power consumption Reduced by 90

HGST Japan, a manufacturer of hard disk drives and other electronic devices, is striving to reduce the environmental impact of its business activities in line with the Western Digital Group,s environmental policy.

For the customer, a continuous reduction in energy use became an issue because it is a designated energy management factory. Kurita Water Industries proposed replacing the membrane filtration equipment with a more efficient one. The previous equipment included a large pump because circulating water returning to the previous stage was necessary due to the original operational condition, but with the new equipment, a small pump can be used because circulating water is not required.

Customer’s Voice

Mr. Haruki Chiba

Mr. Haruki Chiba
Real estate operations
Facility engineering
Engineering Manager

In this case, the proposal was made when we were working to improve energy efficiency, and we adopted it as the improvement was easy to understand and there were substantial benefits. Replacing the old equipment with new smaller equipment made it easier to conduct maintenance and lowered costs, which was helpful.

Improving energy efficiency is an ongoing issue, and we hope for additional proposals for improvements.

Examples of Energy-Use Reduction at KYOCERA Display Corporation (Initiative by Kurita Water Industries Ltd.)

Electric power consumption Reduced by 38

KYOCERA Display Corporation, which mainly manufactures automotive LCD panels, takes initiatives for reducing the environmental impact of its business activities in accordance with the Kyocera Group Environmental Basic Philosophy.

This customer uses ultrapure water for cleaning its products. In comparison with other utility facilities, the ultrapure water production system used by the customer consumes a relatively large amount of power, and reducing the energy consumed by the system had been an issue. Kurita Water Industries reviewed the entire system with an eye to reducing power consumption and proposed an optimization of power consumption with the inverter control of the pump and replacement of the pump with an efficient one.

The customer adopted our proposal. As a result, power consumption was reduced by 38% compared to the consumption before application of the proposal.

Customer’s Voice

r. Ryohei Sakamoto

Mr. Ryohei Sakamoto
Environmental Health & Safety Section
General Affairs Division

Having taken almost all energy-saving measures that we could take, we desperately asked Kurita to propose an improvement.Kurita gave us a good proposal, which enabled us to reduce power consumption. We are very grateful for that. The ultrapure water production system we use now was delivered many years ago. Defects associated with aging also occur so we expect Kurita to review the system fundamentally and propose a system that will enable both an improvement in quality and a reduction in the environmental impact.

At the Kurita Group

Internal Environmental Improvement Activities

The Kurita Group has established targets for CO2 emissions and is taking steps to reduce its energy usage. The Company is participating in the Basic Plan for Environmental Activities of the Japan Society of Industrial Machinery Manufacturers, and report regularly on its response to climate change.

Fiscal 2018 Energy Consumption
Reduction Performance
(Energy Intensity)

Fiscal 2018 target Fiscal 2018 result
Reduction of 1% or more on
average per year from fiscal 2014
1.8% reduction

In fiscal 2018, the Company and its domestic Group companies made efforts to reduce per-unit energy consumption at the business site and company level by 1% or more on average per year from fiscal 2014, based on the approach of the Act on the Rational Use of Energy. For per-unit energy consumption, we established values that are closely related to energy use at each business site and company, such as total floor area, R&D expenditure, and production volume. In fiscal 2018, we achieved the target by undertaking improvement measures such as adoption of inverters for rotating equipment and renewing component equipment for pure water manufacturing facilities with energy-saving types.

Example of Reducing Gasoline Consumption in Sales Vehicles through Drive Recorders

At offices such as headquarters and sales offices of the Company and its domestic Group companies, gasoline consumption by sales vehicles accounts for over 50% of CO2 emissions. The Company has therefore replaced almost all of its fleet of around 500 sales vehicles with hybrid vehicles and highly fuel-efficient vehicles in order to reduce gasoline consumption. Furthermore, the use of drive recorders originally installed to ensure the safety of employees also suppresses behavior that has a significant impact on fuel consumption, such as sudden starting or acceleration, helping to reduce the consumption of gasoline by improving fuel efficiency.