News Brief
On March 11, 2026, Japan’s Ministry of Health, Labour and Welfare (MHLW), Ministry of Economy, Trade and Industry (METI), and Ministry of the Environment (MOE) jointly issued the "Summary of Revisions to the Ministerial Ordinance on Disclosure of New Chemical Substance Names under Article 4, Paragraph 5 of the CSCL". This revision aims to optimize the disclosure system for new chemical substances, focusing on balancing innovation in research and development (R&D) with public transparency.
This update primarily extends the disclosure period and diversifies disclosure methods for certain new chemical substances, offering significant advantages to companies engaged in regular notifications under the CSCL.
What Does the Japan CSCL Revision Mean for Companies?
Under the current system, new chemical substances that complete regular notification are automatically added to the Existing Chemical Substances Inventory after a five-year disclosure period. This allows all companies to produce or import the substance without incurring additional compliance costs.
The revision, however, extends the confidentiality period before disclosure, enabling notifying companies to maintain market exclusivity for a longer time. This change better protects their initial R&D investments and commercial interests.
Extended Disclosure Period to Promote Safer Alternatives
Previously, the confidentiality period for new chemical substances was five years. The revision extends this period to ten years for eligible substances.
To qualify for this extended confidentiality, substances must meet the criteria under Article 4, Paragraph 1, Item 5 of the CSCL, which requires that they:
Are not harmful to human health through long-term exposure.
Do not adversely affect the survival or growth of animals and plants.
This policy encourages the development of safer and environmentally sustainable chemical alternatives, aligning with the Global Framework on Chemicals (GFC) initiative to promote green chemistry innovation.
Diversified Disclosure Methods for Better Accessibility
Previously, new chemical substance names were disclosed only through the Official Gazette. The revision introduces additional publication channels, including the Ministry of Economy, Trade and Industry Official Website and other online platforms.
This change improves accessibility and ensures timely dissemination of information to the public, leveraging the efficiency of digital platforms.
Implementation Timeline of the Revised Ministerial Ordinance
The revised ministerial ordinance is expected to be officially announced in late April 2026 and will take effect on May 1, 2026.
The Japanese government’s dual approach—ensuring public health and environmental safety while supporting industrial competitiveness—underpins this revision. By extending the confidentiality period for low-risk substances and expanding disclosure methods, the policy strikes a balance between transparency and commercial incentives.
Public Consultation Period
The revision is currently open for public consultation, with the deadline for submitting comments set for April 10, 2026.
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