Gunze Uses Proprietary Calculation Technology to Visualize the Contribution of Greening Projects to Reducing Carbon Dioxide Absorption

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OSAKA, Japan--(BUSINESS WIRE)--Sep 7, 2025--

Gunze Limited (Headquarters: Osaka, Japan, President: Toshiyasu Saguchi) [TOKYO: 3002] is pleased to announce that its wholly owned subsidiary, Gunze Green has developed a calculation method to visualize carbon dioxide absorption quantities from greening projects and quantify their reduction contributions through an industry-academia collaboration research project with the Urban Research Center at Kyushu University.
This calculation technology aims to quantify CO2 reduction contributions through not only CO2 absorption from forest management within existing environmental credit frameworks but also business activities, such as supplying trees for greening projects. Furthermore, the methodology is scheduled to be presented at the 14th International Symposium on Eco-Design and Inverse Manufacturing (EcoDesign 2025) in November 2025 and subsequently published in an academic paper.
Gunze Green will continue its efforts to promote the concept of carbon credits and advance the visualization and evaluation of environmental value in the urban greening.

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Gunze Green is contributing to the greening of the Osaka-Kansai Expo by providing excellent trees for the "Forest of Tranquility".

Method for Calculating CO2 Reduction Contributions Based on Proprietary Calculation Technology

Through our joint research with Kyushu University, we have developed a new method for quantitatively evaluating the amount of CO2 absorbed by planted trees over a 100-year growth period. The method estimates increases in tree height and diameter, as well as survival rates, over the target period. Using this data, the method calculates the increase in tree volume to determine CO2 absorption per tree.
This method objectively demonstrates the extent to which the supply of trees in greening projects contributes to CO2 reduction, offering a different perspective than evaluations derived from conventional forest management.

Gunze Green's Carbon Credit Certification Scope

The certification process considers the roles of all parties involved in greening projects, including project owners, designers, contractors (general construction and landscaping), Gunze Green, and producers involved in tree supply.
Gunze Green classified trees shipped in one year into nine species categories and calculated their total CO2 absorption over 100 years. Based on these estimates, the Natural Capital Credit Consortium certified the CO2 absorption over a three-year period.

Gunze Green's Greening Business

Over the past five years, Gunze Green's greening business has planted approximately 25 million trees nationwide. The cumulative CO2 reduction contribution from this initiative exceeds 23,000 tons. Currently, we are leveraging the quantified environmental value as carbon offsets within the Gunze Group. We are incorporating these offsets into the BODY WILD products of our apparel business, thereby establishing a unique environmental contribution model.
Going forward, we plan to work with project owners and other organizations to share the environmental benefits of this initiative with the public.

The following comment is attributable to Mr. Ikeda, the president of Gunze Green

At Gunze Green, we deliver carefully cultivated trees to urban spaces and public areas, serving as a bridge between greenery and cities. Through this work, we have consistently fulfilled our mission of promoting urban greening. Trees nurtured in our nurseries take root in cities, enriching their surroundings and providing comfort and healing to people for generations.
To further advance this mission, we have introduced a new calculation technology that focuses on the “supply” stage of greening projects. This technology provides a framework for evaluating our business as an environmental contribution. Looking ahead, it has the potential to extend beyond tree supply to include the activities of many stakeholders involved in urban greening. Ultimately, this could help establish a new system for assessing and quantifying CO2 absorption.
By visualizing and appropriately valuing the environmental benefits of trees, we can contribute to building sustainable urban environments while enhancing the appeal and value of cities and regions.
Gunze Green remains committed to steadily advancing toward a greener, more sustainable society.

About EcoDesign 2025 – 14th International Symposium

The 14th International Symposium on Environmentally Conscious Design and Inverse Manufacturing (EcoDesign 2025) embraces “EcoDesign Accelerating Social Transformation” as its guiding theme. It will take place November 12–14, 2025, at Waseda University International Conference Center in Tokyo, Japan.
HP: https://ecodenet.com/ed2025/

About Gunze and its greening business

Founded in 1896 in Kyoto, Japan, Gunze is a leading designer and manufacturer of medical devices, plastic films, engineering plastics, apparel, greening materials and other products. Gunze employs more than 4,300 people in 10 countries around the world.
Gunze has been engaged in the greening business since 1973, based on our experience and technology in mulberry cultivation for sericulture, fertilizer management and soil research, and has been developing the landscaping and greening business related to plants and flowers for 53 years.

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CONTACT: Media relations

Gunze Limited, Corporate Communication Department

Shinji Nonaka

TEL: +81-6-6348-1314

HP:https://www.gunze.co.jp/english/support/

KEYWORD: JAPAN NORTH AMERICA ASIA PACIFIC

INDUSTRY KEYWORD: ENVIRONMENT MEDICAL DEVICES ENVIRONMENTAL ISSUES CHEMICALS/PLASTICS MANUFACTURING SUSTAINABILITY HEALTH UNIVERSITY EDUCATION

SOURCE: Gunze Limited

Copyright Business Wire 2025.

PUB: 09/07/2025 10:30 PM/DISC: 09/07/2025 10:29 PM

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