The Five Roles Behind Japan's First SSBJ Reports

In June 2027 a small group of Japanese companies files an annual securities report containing SSBJ-based sustainability disclosure for the first time. The Financial Services Agency’s roadmap chart puts 68 companies in that first band, carrying 54.1% of Tokyo Stock Exchange Prime market capitalisation, with 171 companies once the ¥1 trillion tier joins a year later (FSA, from Bloomberg and JPX data at the end of March 2025).

The February 2026 amendment changed the work before the first filing year began.

The annual securities report must explain how the company reached its forward-looking information and quantitative Scope 3 data. It must also describe the internal disclosure procedures applied to that information (FSA).

What the regulator asked for, and what it settled on

The Financial Council working group set out the shape of it before the ordinance did. Its July 2025 interim report discussed requiring an annual securities report to identify the passages containing forward-looking information, estimates and information supplied by third parties outside the company’s control; to say that such information may turn out differently and why; to state the facts, assumptions and reasoning behind it; to describe the internal procedures used to examine and evaluate its appropriateness, including how the information was obtained; and to identify data providers by name (FSA interim report).

The ordinance implemented the reasoning-process and internal-procedure parts. The safe harbour for Scope 3 quantitative information is drafted around the same objects: liability for misstatement does not attach where the factors behind possible differences, the reasoning process and the internal disclosure procedures are described specifically and within what is generally considered reasonable (FSA).

The safe harbour is only available to a company that can describe its procedure. Someone inside the company has to build that procedure and keep the records that show it ran. The ordinance therefore decides who you need to employ, well before it decides anything about liability.

Two more obligations attach names to the work. The representative and the chief financial officer already file a confirmation letter alongside the annual securities report, and its scope covers the whole report, non-financial content included (FSA interim report, citing FIEA Article 24-4-2). And the SSBJ Universal Standard paragraph 70 requires disclosure of the date the sustainability disclosure was authorised for issue, together with the name of the body or individual that authorised it (SSBJ).

The five roles

The disclosure lead. This person owns the sustainability section of the annual securities report as a securities filing, not as a report. The choice of transitional measures sits here, stated under the Form 2 instruction, as does the decision on whether the company uses two-stage disclosure. The paper trail leading to the authorisation date is this person’s to keep. The common failure is to give this to whoever ran the integrated report. Integrated reporting is a communications discipline with no filing deadline and no liability regime behind it. This job sits closer to the disclosure committee than to the communications team.

The data engineer. The work starts with an entity master that reconciles to the consolidation schedule. Collection then has to run alongside the financial close instead of once a year. Every row in the factor library needs a source and a vintage on it, and a published figure has to trace back to an invoice. Japan makes the factor part concrete: the electricity emission factors published under the SHK scheme are per-utility, dated, and revised after first publication, so a stored number without a version is not evidence. The data foundation is a year of work, and it is the part that cannot be compressed at the end.

The GHG accountant. A specialist role, and the one most often assumed to already exist. The company has reported emissions under the Act on Promotion of Global Warming Countermeasures for years, so someone knows how to fill in the form. That is a different skill from deciding whether the SHK figures are being used under the Climate Standard proviso or merely as raw material for a GHG Protocol calculation, or from knowing that SHK-based indirect emissions map to market-based Scope 2 rather than location-based. Those decisions are accounting policy, and they are set out in the SSBJ Practical Solution issued on 11 June 2026 (SSBJ).

The assurance liaison. Assurance begins one fiscal year after mandatory disclosure for each tier, at limited assurance, scoped in the first two years to governance, risk management and Scope 1 and 2 (FSA roadmap). The person in this seat runs the engagement from the company side, which in practice means sitting in the walkthroughs and being the one who can show that a disclosed figure goes back to the record underneath it. The evidence requests and the management representations land here too. The working group also expects companies to explain themselves on the choice of provider. Modelled on the existing disclosure of why an audit firm was appointed and what it was paid, the report proposes requiring companies to disclose the reason for selecting the assurance provider and the assurance fee (FSA working group report, 8 January 2026).

IR and legal. The sustainability section is now inside a document with a liability regime, a confirmation letter and an amendment mechanism. Someone has to hold the line between what the company can support and what the business would like to say, review the forward-looking passages against the safe-harbour conditions, prepare for the questions at the general meeting, and understand what filing an amendment report actually involves. This is not a review at the end. It is a seat in the room while the numbers are still being decided.

The other side of the market is professionalising faster

The assurance profession recruits from the same pool, and it moved first.

The Japanese Institute of Certified Public Accountants finalised Sustainability Assurance Practice Guideline 5000, on the assurance of sustainability information, on 18 March 2026 and published it on 23 March. It is aligned with ISSA 5000, and its release carried conforming amendments to three existing standards, including the auditor’s responsibilities for other information (JICPA).

Two weeks later, on 1 April 2026, JICPA started running a named training programme. The JICPA Professional Program in Sustainability, ProPS, gives certified public accountants a defined path to sustainability expertise and makes completion visible. Its syllabus has two levels, a basic and common tier and an applied tier aimed at accountants taking a central role in sustainability assurance engagements (JICPA).

The registration regime widens the competition further. The working group considered restricting the engagement partner role to certified public accountants and decided against it, on the reasoning that the necessary accounting knowledge can be acquired through training or supplemented by outside specialists. Members also argued for keeping entry open on grounds of competition and talent supply, while noting that if a qualification is not required, the registration review has to examine the human resources of the provider substantively (FSA working group report).

So the assurance firms are about to hire hard for people who understand emissions data, internal control and financial reporting at the same time. Preparers are hiring for the same person.

We have not found a Japan-specific published measure of that shortage that we would put a number to, and the honest position is to say so rather than to cite a survey we cannot stand behind. The assurance firms and the filers are recruiting from the same small pool, and the June 2027 filing date does not move.

What to do about it before the market tightens

Deciding who authorises the disclosure costs nothing and needs nobody new. The SSBJ Universal Standard requires the authorisation date and the approving body to be disclosed, so the company has to settle whether that is the board, the disclosure committee or a named executive. Every deadline behind the filing is set by that choice, and it can be settled this quarter.

Writing the internal procedure comes before writing the disclosure about it. The ordinance asks for a description of the procedures behind forward-looking and Scope 3 information, and drafting that description is the cheapest way to find out whether the procedure exists.

Hiring starts with the data engineer, the role with the longest lead time and the least substitutability. Consultants can help draft a report. They cannot produce a year of contemporaneous evidence after the year has passed.

Much of the rest can be borrowed rather than built. Segregation of preparer, reviewer and approver, evidence retention and change control are disciplines the finance function already runs, and a control designed to be legible to an audit firm is legible to an assurance practitioner.

The job posting deserves more care than it usually gets. One that asks for sustainability reporting experience attracts integrated-report writers. One that names the annual securities report, assurance readiness, emission factor version control and Scope 3 estimation methods brings in fewer applicants and a far higher share worth interviewing.

For the broader picture of how these teams are structured and where candidates come from, we have written a guide to building a sustainability reporting team and a survey of impact careers and the roles growing fastest. This piece is the narrower Japanese case, where the deadline is a securities filing and the reader of your work is a registered assurance provider.

Check where you stand. The free SSBJ readiness check takes about three minutes and scores the dimensions an assurance provider will actually test: socious.io/ssbj-check.

Socious Report takes one dataset into AI-drafted CSRD, SSBJ and ISSB reports, then adds an independent Socious Verify credential.