Japan’s hazardous substance reporting amendments are now open for public consultation, signalling important compliance changes for manufacturers, importers, and downstream users. Announced on 18 March 2026, the proposed revisions to the Ministerial Ordinance and operational guidelines under the Chemical Substances Control Law aim to modernise reporting processes and expand the scope of reportable hazard information, with implementation expected by May 2026.
A central feature of the hazardous substance reporting amendments is the shift towards electronic submissions via the e-Gov platform. Historically, companies were required to submit hazard data in paper format. The new framework introduces digital reporting to improve efficiency, traceability, and administrative consistency. To support this transition, reporting templates will be revised to clarify required data fields. These include chemical identifiers such as CAS numbers, structural information, and detailed test results. The move aligns with Japan’s broader push towards administrative digitalisation and is expected to reduce reporting burdens over time.
The amendments also refine what constitutes reportable hazard information. Under Article 41, manufacturers and importers must report newly obtained data on persistence, bioaccumulation, and toxicity. Key changes include:
Removal of exemptions for certain substances. For example, second-class specified chemical substances will now require reporting of persistence-related data, reflecting earlier legislative updates.
Clarification that monitoring substances are no longer exempt from reporting specific hazard endpoints where appropriate.
Inclusion of additional toxicological endpoints such as chronic toxicity, reproductive toxicity, and carcinogenicity based on test results.
These updates ensure that regulators receive more comprehensive datasets to support risk assessment and chemical management decisions.
The hazardous substance reporting amendments affect a wide range of actors beyond chemical manufacturers. Importers, formulators, and companies relying on safety data sheets must reassess internal data collection and reporting workflows. Businesses will need to:
Review existing hazard data portfolios for completeness and relevance.
Update internal systems to comply with new digital submission requirements.
Ensure alignment between regulatory reporting and safety documentation such as SDS.
Failure to report relevant hazard information within the mandated 60-day period after obtaining new data could result in enforcement risks.
The public comment period runs until 16 April 2026, providing stakeholders with an opportunity to shape the final regulatory text. Following consultation, the government plans to finalise and implement the amendments by May 2026. Companies operating in or exporting to Japan should act promptly to assess compliance gaps.
Organisations should conduct an immediate gap analysis of their hazardous substance reporting processes and prepare for digital submission via e-Gov to avoid disruption when the amendments enter into force.
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