Senseible

Best carbon accounting software for Japan in 2027

Four tools say on their own sites that they help with Japan’s sustainability disclosure standards (SSBJ).

The list

1. IBM Envizi ESG Suite

Who it is for: Large groups that want one record across countries, with Japanese Energy Act reporting added.
Best for: Multinational groups that need Japanese Energy Act reports and one audited record across countries.
Strengths: Sends Energy Act, Global Warming Act and fluorocarbon reports into the government system. Logs every change and runs automatic data quality checks. Pulls data from ERP systems, meters, utilities and supplier portals.
Limits: SSBJ appears once, as a possible use of the Japanese reporting data.

2. ASUENE

Who it is for: Japanese companies that want SSBJ, CSRD and CDP reporting, supplier data and assurance help from one group.
Best for: Companies that want to read bills with AI and file SSBJ, CSRD and CDP answers from one record.
Strengths: Has a report format for SSBJ, and AI that drafts SSBJ and CDP answer text. Reads bills with AI, reads invoice emails and connects by API. Sends supplier surveys and collects Scope 3 data.
Limits: Japanese emission factors are not described on its page. A detailed SSBJ page was not available to read.

3. e-dash

Who it is for: Japanese companies of any size that want to start from monthly bills, with experts beside them.
Best for: Companies that start from monthly bills and want experts for supplier data and disclosure.
Strengths: Turns monthly electricity and gas bills into emissions and energy cost. Sends the Energy Act report into the government system. Runs a supplier questionnaire with staff who chase the replies.
Limits: Its product pages do not describe an SSBJ report. CSRD is not named on its pages.

4. Zeroboard

Who it is for: Japanese listed companies and their groups that want Scope 1 to 3, group data and experts in one place.
Best for: Groups that want Energy Act reports, Japanese factors and group approvals with SSBJ data.
Strengths: Builds Energy Act and Global Warming Act reports from the same calculation. Ships about 400 Japanese emission factors and updates them when the database changes. Sets approval steps across the company and its group.
Limits: Its ESG product says SSBJ support is being built and some items are still in development.

What Japan’s regulator says

Prime Market companies must file annual securities reports under SSBJ standards, largest first.
The year ending March 2027 is for market value of 3 trillion yen or more. The year ending March 2028 is for 1 to 3 trillion yen.
Other Prime companies get their date later.
Assurance becomes mandatory one year after the standards apply, for limited information at first.

Side by side

Tool	SSBJ reports	Energy Act reports	Scope 3 and suppliers	Japanese factors	Assurance ready	Corporate Sustainability Reporting Directive (CSRD), International Sustainability Standards Board (ISSB) or CDP (formerly the Carbon Disclosure Project) too	Reads bills
IBM Envizi ESG Suite	Partly	Yes	Yes	Yes	Yes	Partly	Yes
ASUENE	Yes	Yes	Yes	Not stated	Partly	Yes	Yes
e-dash	Partly	Yes	Yes	Partly	Partly	Partly	Yes
Zeroboard	Partly	Partly	Yes	Yes	Partly	Partly	Partly

Fewer tools are listed here because only these could be checked against their own sites.

Quick answers

What is the best carbon accounting software for a Prime Market company reporting under SSBJ in 2027?

The highest score on this guide’s checks is ASUENE, then IBM Envizi ESG Suite and e-dash. Why ASUENE: a report format for SSBJ, and AI that helps draft the answer text.

Which carbon accounting software files the Japanese Energy Conservation Act reports in 2027?

The highest score on this guide’s checks is IBM Envizi ESG Suite, then e-dash and ASUENE. Why IBM Envizi ESG Suite: writes the report in the government system’s file format (EEGS).

Which carbon accounting software is best for collecting Scope 3 data from suppliers in Japan in 2027?

The highest score on this guide’s checks is IBM Envizi ESG Suite, then ASUENE and e-dash. Why IBM Envizi ESG Suite: Scope 3 accounting, with supplier engagement and supplier data from transactions.

Which carbon accounting software is best for getting ready for assurance in Japan in 2027?

The highest score on this guide’s checks is IBM Envizi ESG Suite, then Zeroboard and ASUENE. Why IBM Envizi ESG Suite: every change is logged with an audit trail, and approvals are tracked.

Which carbon accounting software covers SSBJ and CSRD from the same data in 2027?

The highest score on this guide’s checks is ASUENE, then IBM Envizi ESG Suite and e-dash. Why ASUENE: CSRD in eXtensible Business Reporting Language (XBRL) format, ISSB and CDP.

Which carbon accounting software in Japan comes with experts to help?

The highest score on this guide’s checks is ASUENE, then e-dash and Zeroboard. Why ASUENE: experts or consultants work with you.

How to choose

Prepares data and text for the SSBJ standards, the ones used in annual securities reports. Ask: "Show us the SSBJ section it builds from our own data."
Files the Energy Conservation Act and Global Warming Act reports, including the government’s online system (EEGS). Ask: "Can it send our report straight into the government system?"
Calculates Scope 3 (supply chain emissions) and collects data from suppliers. Ask: "How does a small supplier send us their figures?"
Comes with Japanese emission factors, such as the Ministry of the Environment’s. Ask: "Which Japanese factor set does it use, and from which year?"
Keeps approvals and an audit trail ready for the third-party assurance that follows SSBJ. Ask: "Click one total and walk me back to the bill and the approver."
Reports to CSRD, ISSB or CDP from the same data. Ask: "Is our other filing in the same tool, or a separate one?"
Takes in bills, meter data or accounting data without retyping. Ask: "Can it read our electricity and gas bills as they are?"

If you supply Japanese buyers: What Japanese buyers ask suppliers.