Asuene Inc. has signed a definitive agreement to acquire and integrate “Sustana,” the greenhouse gas (GHG) emissions management cloud service developed by Sumitomo Mitsui Banking Corporation (SMBC). Simultaneously, Asuene has closed the first tranche of its Series C2 funding round, which includes a strategic equity investment and share transfer from Sumitomo Mitsui Financial Group (SMBC Group). Through this deal, Asuene further strengthens its strategic capital and business alliance with SMBC Group.

This integration positions Asuene as the leading platform for GHG emissions management across Asia, accelerating global collaboration between the two companies.

As climate action accelerates globally, corporate sustainability management is becoming increasingly complex. From regulatory requirements under the ISSB and CSRD to growing stakeholder demand for transparency, companies are now expected to measure and reduce emissions across their entire supply chain.

Since launching “ASUENE” in August 2021, Asuene has become Japan’s No.1 carbon accounting platform*, serving over 10,000 corporate clients. The company provides end-to-end decarbonization and ESG solutions through integrated data partnerships and strategic alliances with leading institutions—including SMBC.

SMBC Group’s mid-term management plan, “Plan for Fulfilled Growth,” prioritizes the creation of social value. SMBC began offering “Sustana” in May 2022 as part of its decarbonization strategy, focusing on listed corporations on the Tokyo Stock Exchange Prime Market.

This deal brings together Asuene’s strength in emissions visualization and SMBC Group’s expertise in global decarbonization finance, enabling both parties to respond to the growing and evolving needs of corporate sustainability.

Strategic Outcomes of the Integration

Through this integration, Asuene and SMBC Group will enhance collaboration across several key areas:
1. Establish ASUENE as undisputed No.1 carbon accounting platform in Asia
2. Expanding global cooperation across Asia, the US., and beyond
3. Accelerating co-creation of next generation climate tech solutions

Business Momentum and Use of Funds

Asuene continues to expand its multi-product decarbonization and ESG offerings in the climate tech space.

“ASUENE” has achieved 95% ARR growth since its last funding round, serving more than 10,000 companies—making it Japan’s market leader*. The ESG rating cloud “ASUENE ESG” now covers over 15,000 companies, helping organizations advance their ESG initiatives. Additionally, the carbon credit marketplace “Carbon EX” has surpassed 1,500 registered entities, making it the top platform by number of participants in Japan.

To further accelerate global expansion, Asuene launched its fifth international office in April 2025—Asuene Europe Limited—based in the UK, following locations in Singapore, the US., the Philippines, and Thailand. This marks a strategic entry into Europe, the world’s largest sustainability market.

Executive Comments

Masayuki Takanashi, Executive Officer, Group CSuo, SMFG / Executive Officer, Head of Sustainability Division for Fullfilled Growth, SMBC

Since entering a strategic capital and business alliance with Asuene in June 2024, we have been working together to accelerate decarbonization across Japan, Asia, and globally. By integrating the Sustana business and investing further in Asuene, we aim to co-create holistic decarbonization solutions that go beyond emissions tracking. Together, we will empower corporations to increase enterprise value while advancing the transition to a net zero society.

Kohei Nishiwada, Founder, CEO & COO, Asuene Inc.

It is a great honor to announce the integration of the Sustana business and the deepening of our capital partnership with SMBC Group. I sincerely thank everyone involved for their dedication and support.With this enhanced alliance, we are committed to delivering even higher-value services to Sustana’s existing users. We will significantly scale our consulting and customer success capabilities to support that goal.

We strongly resonate with SMBC Group’s vision for ‘Fulfilled Growth.’ Together, we aim to forge a modern partnership of innovation and transformation—targeting global leadership at the intersection of sustainability data, finance, and AI.

This press release has also been published on VRITIMES