- Inclusion in ESG Indices
- Other Sustainability Evaluations (TAIYO YUDEN)
- 3rd party Evaluation (RBA-VAP Audit)
Inclusion in ESG Indices
TAIYO YUDEN Group has been highly evaluated the efforts aimed at the sustainable development of society and TAIYO YUDEN, thus it is selected in following ESG Indices*. (As of Sep. 2026)
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*ESG Indices; an indicator of investment composed of companies highly evaluated focused on 3 factors, Environment, Social, and Governance.
ESG Indices Selected by GPIF
TAIYO YUDEN has been included as a constituent stock of the following ESG indices for Japanese equities selected by the Government Pension Investment Fund (GPIF).
FTSE Blossom Japan Index
FTSE Blossom Japan Index is a stock price index compiled by FTSE Russell in the UK. It is composed of Japanese companies that meet global environmental, social and governance standards.
FTSE Blossom Japan Sector Relative Index
The FTSE Blossom SR is a general ESG index that screens stocks based on FTSE Russell's ESG ratings as well as assessment of magnitude of environmental damage by companies, and companies' management attitude toward climate change risks.
S&P/JPX Carbon Efficient Index
The S&P/JPX Carbon Efficient Index is an index compiled by the Tokyo Stock Exchange and S&P Dow Jones Indices (US). Companies included are selected based on their disclosure of environment-related information and their carbon efficiency standards. The Government Pension Investment Fund (GPIF) of Japan has selected this index as a core ESG index.
MSCI Japan ESG Select Leaders Index
MSCI Japan ESG Select Leaders Index is a stock price index compiled by MSCI Inc. in the United States. It is composed of the companies with high ESG rating from environmental, social, and governance perspectives in each.
MSCI Japan Empowering Women Index (WIN)
The MSCI Japan Empowering Women Index is an index compiled by MSCI Inc. The index includes Japanese companies with high gender diversity scores thanks to their promotion of women in the workplace.
Morningstar Japan ex-REIT Gender Diversity Tilt Index
Built with the data and scoring methodology of Equileap, "GenDi J" is designed to emphasize the stocks of companies that have strong gender diversity policies embedded in their corporate culture and that ensure equal opportunities to employees, irrespective of their gender. Companies are divided into five equally sized groups based on their Gender Equality Score.
Other ESG Indices
FTSE4Good Index Series
The FTSE4Good Index Series is an index compiled by FTSE Russell (UK). The index includes companies that have demonstrated strong Environment, Social, and Governance (ESG) practices that are based on global standards.
MSCI Japan ESG Select Leaders Index
MSCI Japan ESG Select Leaders Index is a stock price index compiled by MSCI Inc. in the United States. It is composed of the companies with high ESG rating from environmental, social, and governance perspectives in each.
SOMPO Sustainability Index
The SOMPO Sustainability Index is an index compiled by SOMPO Asset Management. The index is composed of Japanese companies with strong ESG performance evaluations and stock valuations.
Other Sustainability Evaluations (TAIYO YUDEN)
Selected for Inclusion in CDP's "Climate Change A List" and "Supplier Engagement Leader"
TAIYO YUDEN has been recognized for its leadership in climate change transparency and performance by CDP, an international environmental non-profit organization, and has been selected as an A List company-the highest rating-for four consecutive years.
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*Founded in 2000, CDP is a non-governmental organization (NGO) managed by UK charities that operates a global disclosure system for investors, businesses, nations, regions and cities to manage their environmental impacts, including reducing their own greenhouse gas emissions, protecting water resources and protecting forests.
EcoVadis Bronze Medal
EcoVadis is a provider of business sustainability ratings that evaluates companies across four themes: Environment, Labor & Human Rights, Ethics, and Sustainable Procurement. The EcoVadis network includes more than 150,000 rated companies in over 185 countries worldwide.
In the 2026 EcoVadis sustainability assessment, TAIYO YUDEN Group was awarded the Bronze Medal, which is granted to companies ranked within the top 35% of all companies assessed by EcoVadis.
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*For more information on the assessment results, please see below.
https://recognition.ecovadis.com/nNmmzBG7K0K___3cvYujtQ
Selected for the Outstanding Organizations of KENKO Investment for Health (White 500)
TAIYO YUDEN appointed a Chief Healthcare Officer (CHO) and established a "Health Promotion Committee" to promote employee health. The company was selected as one of the Outstanding Organizations of KENKO Investment for Health (White 500) by the Ministry of Economy, Trade and Industry of Japan and the Nippon Kenko Kaigi.
Sports Yell Company
Certified by the Japan Sports Agency as a company that promotes exercise in the workplace.
In 2026, we obtained the "Bronze Certification" as a company that has been certified for a total of over 6 years.
Eruboshi Certification
TAIYO YUDEN earned Eruboshi certification.
Certified as a Platinum Kurumin employer
TAIYO YUDEN was certified as "Kurumin" in 2021. Recognized as a company that is working on child-rearing support at a high level, it was certified as "Platinum Kurumin" on July 25, 2023.
RBA-VAP Audit
TAIYO YUDEN Group has implemented activities to comply with the RBA (Responsible Business Alliance) Code of Conduct, which is a code of conduct related to social responsibility. We regularly have the RBA-VAP audit as third-party evaluation to enhance level of labor, ethics, health and safety, and environment continually.
Target of RBA Code of Conduct
| LABOR | HEALTH AND SAFETY | ENVIRONMENT | ETHICS |
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| MANAGEMENT SYSTEMS | |||
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Flow of Audit
The auditee sites complete a self-assessment questionnaire created by the RBA to understand their internal conditions. The results are summarized by the RBA-VAP audit control department of the Group, and corrective actions are implemented at the auditee sites. An internal audit is conducted based on RBA-VAP audit standards, and after that, an initial RBA-VAP audit is conducted as a third-party evaluation. Non-conformances found in the audit are corrected according to the corrective plan, and to confirm the validity, a closure RBA-VAP audit is conducted.
Auditee of RBA-VAP Audit
| TAIYO YUDEN CO., LTD. (Japan) | Haruna Plant / Nakanojo Plant / Tamamura Plant / Yawatabara Plant |
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| Consolidated Subsidiary (Japan) | TAIYO YUDEN CHEMICAL TECHNOLOGY CO., LTD. / FUKUSHIMA TAIYO YUDEN CO., LTD. / NIIGATA TAIYO YUDEN CO., LTD. / WAKAYAMA TAIYO YUDEN CO., LTD. / TAIYO YUDEN Mobile Technology Co., Ltd. / ELNA CO., LTD. (Shirakawa Plant & Aomori Plant) |
| Consolidated Subsidiary (Other Countries) | KOREA KYONG NAM TAIYO YUDEN CO., LTD. TAIYO YUDEN (CHANGZHOU) CO., LTD. TAIYO YUDEN (GUANGDONG) CO., LTD. TAIYO YUDEN (PHILIPPINES), INC. TAIYO YUDEN (SARAWAK) SDN. BHD. |
Certification
The results of the RBA-VAP audit are issued with certifications based on scores: Platinum (200 points), Gold (180 points or more), and Silver (160 points or more).
In FY2025, TAIYO YUDEN Haruna Plant, TAIYO YUDEN Tamamura Plant, TAIYO YUDEN Chemical Technology and ELNA Shirakawa Plant received Gold certification in their initial audits.
At the sites where non-conformities were pointed out, improvements were recognized as a result of the closure audit, and they achieved the highest level of Platinum certification.
The certification is valid for two years from the initial audit.
Haruna Plant
Tamamura Plant
TAIYO YUDEN CHEMICAL TECHNOLOGY
ELNA Shirakawa Plant
