Japan’s SSBJ Roadmap: What Global Companies Operating in Japan Need to Prepare

Japan has entered the mandatory sustainability disclosure era. In March 2025, the Sustainability Standards Board of Japan (SSBJ) published its final standards, creating a national framework aligned with the International Sustainability Standards Board’s (ISSB) IFRS S1 and S2. Starting from FY2027, the largest companies listed on the Tokyo Stock Exchange’s Prime Market will be required to include SSBJ-compliant sustainability disclosures in their annual securities reports (yuho).

For global companies with Japanese subsidiaries, listings, or significant operations in Japan, this is not a distant regulatory development to monitor. It is a compliance obligation with a defined timeline, specific technical requirements, and material consequences for reporting teams that are already managing CSRD, SEC, and ISSB obligations elsewhere.

This article explains what the SSBJ standards require, when each phase takes effect, how SSBJ differs from other global frameworks, and what compliance officers and sustainability leaders should be doing now to prepare.

What Is the SSBJ?

The Sustainability Standards Board of Japan (SSBJ) was established under the Financial Accounting Standards Foundation (FASF) to develop Japan’s national sustainability disclosure standards. The SSBJ operates as Japan’s equivalent of the ISSB at the national level, adapting international standards to the Japanese regulatory and market context.

The SSBJ published two core standards:

SSBJ Standard No. 1 (aligned with IFRS S1): General requirements for sustainability-related financial disclosures, covering governance, strategy, risk management, and metrics and targets across all sustainability topics material to the reporting entity.
SSBJ Standard No. 2 (aligned with IFRS S2): Climate-related disclosures, including physical and transition risks, greenhouse gas emissions (Scopes 1, 2, and 3), climate-related targets, and transition plans.

These standards were finalized in March 2025 after an extended public comment process. The Financial Services Agency (FSA) confirmed that SSBJ disclosures will be integrated into the existing yuho (annual securities report) framework, meaning they carry the same legal weight as financial disclosures.

The Mandatory Timeline: Who Reports When

Japan’s approach to SSBJ adoption follows a phased model based on market capitalization, beginning with the largest Prime Market-listed companies and expanding over subsequent years.

Phase	Fiscal Year	Reporting Year	Scope	Estimated Companies
Phase 1	FY2027 (Apr 2027 - Mar 2028)	2028	Prime Market, market cap >= 3 trillion yen	~50-60
Phase 2	FY2028 (Apr 2028 - Mar 2029)	2029	Prime Market, market cap >= 1 trillion yen	~150-200
Phase 3	FY2029+ (Apr 2029 - Mar 2030+)	2030+	Potentially all Prime Market companies	~1,800

Key details:

Phase 1 (FY2027): Companies with market capitalization of 3 trillion yen (~$20 billion USD) or more. This captures Japan’s largest corporations — Toyota, Sony, Mitsubishi UFJ, Hitachi, Keyence, and similar. These companies generally have mature sustainability reporting programs but must now align disclosures with the specific SSBJ format and integrate them into yuho filings.
Phase 2 (FY2028): The threshold drops to 1 trillion yen (~$6.7 billion USD), significantly expanding the scope. Many companies in this tier have published voluntary sustainability reports but have not prepared disclosures at the level of rigor SSBJ demands, particularly around Scope 3 emissions and scenario analysis.
Phase 3 (FY2029+): The FSA has indicated that mandatory application may expand to all Prime Market companies. The exact scope and timeline remain under discussion, but the direction is clear: SSBJ compliance will eventually be a listing requirement for the entire Prime Market.

Note on fiscal year alignment: Most major Japanese companies use an April-to-March fiscal year. FY2027 means the fiscal year starting April 2027 and ending March 2028, with the yuho filing due approximately three months after fiscal year-end (by late June 2028).

What the SSBJ Standards Require

The SSBJ standards follow the four-pillar structure established by the ISSB: Governance, Strategy, Risk Management, and Metrics and Targets. However, several Japan-specific requirements go beyond the ISSB baseline.

Core Disclosure Requirements

Governance. Disclose the governance body or individual responsible for oversight of sustainability-related risks and opportunities. Describe how sustainability topics are integrated into the company’s decision-making processes, including board-level oversight, management responsibilities, and internal controls.

Strategy. Describe the sustainability-related risks and opportunities that could reasonably be expected to affect the company’s cash flows, access to finance, or cost of capital over the short, medium, and long term. For climate-related disclosures, this includes scenario analysis consistent with IFRS S2 requirements.

Risk Management. Explain the processes used to identify, assess, prioritize, and monitor sustainability-related risks. Describe how these processes are integrated with the company’s overall risk management framework.

Metrics and Targets. Report quantitative metrics used to measure and monitor sustainability-related risks and opportunities. For climate disclosures, this includes Scope 1, 2, and 3 greenhouse gas emissions, climate-related targets, and progress against those targets.

Japan-Specific Requirements Beyond ISSB

While the SSBJ standards are built on the ISSB foundation, they include several additions and specifications that reflect Japan’s regulatory context:

Scope 3 disaggregation. The SSBJ standards require more granular Scope 3 reporting than the ISSB baseline. Companies must disaggregate Scope 3 emissions by the 15 categories defined in the GHG Protocol, rather than reporting a single aggregate figure. This is a significant data collection challenge for companies that have only reported total Scope 3 numbers.

Transition plan disclosure. While IFRS S2 requires disclosure of transition plans, the SSBJ provides additional guidance on the expected level of detail, including alignment with Japan’s Green Transformation (GX) policy framework and the country’s 2050 carbon neutrality commitment.

Industry-specific metrics. The SSBJ references industry-based disclosure topics derived from the SASB Standards (now part of the ISSB). Japanese companies are expected to consider these industry-specific metrics in their materiality assessments.

Integration with yuho format. SSBJ disclosures must be included in a dedicated sustainability section of the annual securities report. This is not a standalone report — it is part of the legally mandated filing, subject to the same legal liability as financial statements.

How SSBJ Compares to Other Frameworks

For global companies reporting under multiple sustainability frameworks, understanding the intersections and divergences between SSBJ, ISSB, and CSRD is essential for efficient compliance.

SSBJ vs. ISSB (IFRS S1 and S2)

Dimension	ISSB	SSBJ
Foundation	IFRS S1 and S2	Built on IFRS S1 and S2
Materiality	Single materiality (financial)	Single materiality (financial)
Scope 3	Aggregate reporting permitted	Disaggregation by 15 GHG Protocol categories required
Transition plans	Required, general guidance	Required, with Japan GX alignment expectations
Filing format	Flexible (standalone or integrated)	Mandatory inclusion in yuho
Assurance	Encouraged, not mandated by ISSB itself	Phased introduction planned by FSA
Language	English	Japanese (with English translation common for large firms)

Practical implication: Companies already reporting under ISSB have a strong foundation for SSBJ compliance. The primary gaps will be Scope 3 disaggregation, Japan-specific transition plan details, and the technical integration into yuho filing format.

SSBJ vs. CSRD/ESRS

Dimension	CSRD / ESRS	SSBJ
Materiality approach	Double materiality (impact + financial)	Single materiality (financial only)
Standard scope	12 topic-specific ESRS across E, S, G	Climate-focused (S2 equivalent), with general requirements (S1 equivalent)
Reporting boundary	Entire value chain mandated	Value chain considered, but emphasis on reporting entity
Digital tagging	XBRL mandatory	Within existing yuho XBRL framework
Assurance	Limited assurance mandatory from Wave 1	Phased, timeline under discussion
Scope 3	Required as part of ESRS E1	Required with 15-category disaggregation

Practical implication: The single vs. double materiality difference is fundamental. Companies subject to both CSRD and SSBJ will need to maintain two materiality approaches. However, the financial materiality dimension of CSRD’s double materiality assessment directly maps to SSBJ’s single materiality concept, creating a reusable foundation. The environmental and social impact data collected for CSRD will exceed SSBJ requirements in most areas, meaning CSRD-compliant companies can derive SSBJ disclosures from their existing data with targeted additions.

Implications for Foreign Companies Operating in Japan

The SSBJ standards apply to companies listed on the TSE Prime Market. This directly affects foreign companies in several scenarios.

Direct Listing on TSE Prime Market

Foreign companies listed on the Prime Market are subject to the same SSBJ requirements as domestic companies. While few non-Japanese companies maintain primary listings on TSE, those with dual listings or secondary listings should verify their obligations.

Japanese Subsidiaries of Global Companies

The more common scenario: a foreign multinational’s Japanese subsidiary is part of a group listed on the Prime Market. In this case, the Japanese parent entity must include the subsidiary’s sustainability data in its consolidated SSBJ disclosures. Foreign headquarters will need to provide Japan-formatted sustainability data to their Japanese operations.

What this means in practice:

Group sustainability teams must ensure their data collection covers SSBJ-specific requirements (e.g., 15-category Scope 3 disaggregation) — not just ISSB or CSRD formats
Data must be translatable to the yuho format and potentially reported in Japanese
Internal transfer pricing of sustainability data collection costs may need to be formalized

Multi-Framework Reporting Challenge

Global companies with operations in Japan, the EU, and other jurisdictions face an increasingly complex reporting landscape:

Jurisdiction	Framework	Materiality	Mandatory From
Japan	SSBJ	Financial (single)	FY2027 (phased)
EU	CSRD / ESRS	Double (impact + financial)	FY2024 (phased)
US	SEC Climate Rule	Financial (single)	Uncertain
Global	ISSB (IFRS S1/S2)	Financial (single)	Varies by jurisdiction

The strategic response is not to build separate reporting processes for each framework. It is to build a unified data infrastructure that collects granular sustainability data once and maps it to multiple frameworks simultaneously.

How to Prepare: A Five-Step Roadmap

Whether your company is directly in scope for Phase 1 or anticipating future phases, the following preparation steps apply.

Step 1: Assess Which Standards Apply

Map your company’s global reporting obligations. Determine:

Whether you are listed on TSE Prime Market (direct SSBJ obligation)
Whether your Japanese operations are part of a TSE Prime Market-listed group (indirect obligation via parent)
Your market capitalization tier and corresponding SSBJ phase
Other frameworks that apply: CSRD (EU operations), SEC (US listing), local requirements in other jurisdictions

This assessment should produce a single document showing every mandatory sustainability disclosure framework, the applicable entity, the reporting period, and the filing deadline.

Step 2: Map SSBJ Requirements to Existing ISSB/CSRD Data

If your company already reports under ISSB or CSRD, significant data overlap exists. Conduct a gap analysis:

ISSB reporters: Your IFRS S1/S2 disclosures cover most SSBJ requirements. Key gaps are likely Scope 3 category-level disaggregation, Japan GX-aligned transition plan details, and yuho format integration.
CSRD reporters: Your ESRS disclosures exceed SSBJ requirements in many areas (due to double materiality and broader topic coverage). The main mapping effort is extracting financial-materiality-focused climate data from your broader ESRS dataset and formatting it for yuho.
First-time reporters: If you have not reported under any mandatory framework, start with the SSBJ requirements as your baseline and build upward to cover other frameworks as needed.

Step 3: Fill Japan-Specific Disclosure Gaps

The most common gaps for global companies adapting to SSBJ:

Scope 3 by 15 categories. Many companies report aggregate Scope 3 or only a subset of categories. SSBJ requires all 15 GHG Protocol categories to be reported (or explicitly justified as not applicable). This often requires new data collection from supply chain partners, business travel systems, and waste management providers.
Transition plan with GX alignment. Japan’s GX framework emphasizes specific decarbonization pathways, including nuclear energy, hydrogen, ammonia co-firing, and carbon recycling. Companies should articulate how their transition plans account for Japan’s energy mix and policy direction.
Industry-specific metrics. Review the SASB-derived industry metrics referenced by SSBJ and ensure your disclosures cover the metrics material to your industry classification.

Step 4: Build Bilingual Reporting Capability

SSBJ disclosures must be filed in Japanese as part of the yuho. For foreign companies and multinational groups, this creates a bilingual reporting requirement:

Sustainability data must be accurately translated and presented in Japanese business and regulatory terminology
Metrics, targets, and methodological descriptions must be consistent between English group reports and Japanese yuho disclosures
Internal review processes must include Japanese-language quality assurance
Consider engaging sustainability reporting specialists with Japanese regulatory expertise, rather than relying solely on general translation services

Step 5: Align Assurance Timelines

The FSA plans to introduce assurance requirements for SSBJ disclosures on a phased basis. While the exact timeline and assurance level (limited vs. reasonable) are still under discussion, companies should:

Engage audit firms early to discuss SSBJ assurance readiness
Ensure data processes and internal controls meet auditability standards from the first reporting cycle, even if assurance is not yet mandatory
Align SSBJ assurance planning with existing CSRD assurance timelines to avoid duplicative engagements where possible

The Cost of Delay

Companies that treat SSBJ as a distant compliance exercise risk several consequences:

Data infrastructure gaps. Scope 3 disaggregation by 15 categories cannot be achieved in a single quarter. Supply chain data collection, methodology development, and quality assurance require sustained effort over multiple reporting cycles.
Filing risk. SSBJ disclosures are part of the yuho, a legally mandated filing. Incomplete or inaccurate sustainability disclosures carry the same legal exposure as financial misstatements.
Investor pressure. Japanese institutional investors — led by GPIF (the world’s largest pension fund), Nomura Asset Management, and others — are increasingly integrating sustainability disclosures into investment decisions. Companies that report late, poorly, or incompletely will face questions from their shareholder base.
Multi-framework inefficiency. Companies that build SSBJ reporting in isolation, disconnected from their CSRD or ISSB processes, will duplicate data collection, create inconsistencies between frameworks, and spend significantly more than necessary.

How Technology Closes the Gap

The convergence of multiple mandatory sustainability frameworks — SSBJ, CSRD, ISSB, and potentially more — makes manual compliance increasingly impractical. AI-powered reporting platforms address the most resource-intensive aspects of multi-framework reporting:

Automated framework mapping — classify sustainability data against SSBJ, ESRS, and ISSB taxonomies simultaneously, identifying gaps and overlaps across frameworks
Scope 3 disaggregation support — map emission data to the 15 GHG Protocol categories required by SSBJ, using activity-based and spend-based calculation methodologies
Multi-framework output — collect data once and generate disclosures formatted for yuho (SSBJ), management report (CSRD), and standalone sustainability report (ISSB) from a single dataset
Bilingual reporting — produce consistent disclosures in both English and Japanese, ensuring terminological accuracy across languages
Audit trail automation — maintain traceable data provenance from source to disclosure, supporting assurance readiness from day one

Socious Report is built for this multi-framework reality. As an AI-powered sustainability reporting platform with native SSBJ support, it guides organizations through the complete disclosure process — from materiality assessment through framework-specific output generation. For global companies managing SSBJ alongside CSRD and ISSB obligations, the platform eliminates the need to maintain separate reporting workstreams for each framework.

The Bottom Line

Japan’s SSBJ standards represent the country’s most significant step toward mandatory sustainability disclosure. For the largest Prime Market companies, reporting begins in FY2027 — meaning data collection and process design must be underway now. For global companies with Japan operations, SSBJ adds another framework to an already complex reporting landscape, but one that shares substantial common ground with ISSB and CSRD.

The companies that will navigate this transition most effectively are those that invest in unified data infrastructure, map requirements across frameworks early, and use technology to manage the complexity inherent in multi-jurisdictional sustainability reporting. SSBJ compliance is not just a Japanese regulatory exercise — it is an opportunity to build a reporting capability that serves every framework, every jurisdiction, and every stakeholder demanding transparency.

Ready to prepare for SSBJ compliance? Book a demo of Socious Report to see how AI-powered multi-framework reporting can streamline your path from gap analysis to disclosure — across SSBJ, CSRD, and ISSB.

This article reflects SSBJ requirements and timelines as of March 2026. Companies should consult legal and regulatory advisors for entity-specific obligations. Sources: SSBJ Official Standards, FSA Sustainability Disclosure Policy, ISSB IFRS S1 and S2, JPX Prime Market Listing Requirements, EFRAG ESRS Standards

Japan's SSBJ Roadmap: What Global Companies Operating in Japan Need to Prepare