Carbon EX Initiates API Integration with Tokyo Metropolitan Government's "Carbon Credit Market"
Carbon EX has initiated API integration with the Tokyo Carbon Credit Market, leveraging its track record of handling 1.5 million t-CO2 to expand credit trading options for companies in Tokyo.
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- 📰 Published: March 31, 2026 at 23:00
- 🤖 AI Analyzed: June 2, 2026 at 12:56 (1501h 56m after Published)
Carbon EX Inc. (Head Office: Minato-ku, Tokyo; Representative Directors: Kohei Nishiwada, Shunsuke Takeda; hereinafter "the Company") is pleased to announce the start of system integration with the "Tokyo Carbon Credit Market" operated by the Tokyo Metropolitan Government. This integration will allow a portion of the credits handled on "Carbon EX," the carbon credit and emissions trading platform operated by the Company, to be purchased on the Tokyo Carbon Credit Market, thereby improving the convenience of carbon credit utilization for companies, particularly those in Tokyo.

Background of API Integration
Towards the realization of carbon neutrality by 2050, companies are required to visualize and reduce greenhouse gas emissions, as well as enhance external disclosure and accountability. Particularly in Japan, with the full-scale operation of GX-ETS scheduled for April 2026, the utilization of carbon credits is no longer merely an offsetting measure but is transforming into a crucial option integrated with management decisions.
On the other hand, the credit market has faced challenges such as varying transaction processes for each certification scheme, dispersed information, and ensuring reliability, making it particularly difficult for small and medium-sized enterprises (SMEs) to utilize credits. To address these issues, the Tokyo Metropolitan Government has established its unique platform, the "Tokyo Carbon Credit Market," which facilitates easy trading of domestic and international carbon credits, thereby supporting decarbonization efforts of companies in Tokyo.
Against this backdrop, the Company has initiated this integration with the Tokyo Carbon Credit Market with the aim of further enhancing the liquidity and convenience of the carbon credit market.
API Integration Realizing Advanced Carbon Credit Distribution
Through this integration, a portion of the credits handled on "Carbon EX," our carbon credit and emissions trading platform, can now be purchased on the Tokyo Carbon Credit Market via API. This expands the procurement options, creating an environment where companies can procure credits more efficiently and flexibly.
In particular, by connecting our platform, which boasts one of Japan's largest transaction volumes and a diverse lineup of credits, with the Tokyo Metropolitan Government's infrastructure, we expect to improve the liquidity and transparency of credit distribution. As a result, companies will find it easier to select optimal credits aligned with their decarbonization strategies and disclosure needs, further enhancing the effectiveness of carbon credit utilization.
This initiative holds significant meaning in that it integrates fragmented credit markets across the board by connecting private platforms with administrative infrastructure, thereby improving practical convenience.
Future Outlook
Moving forward, the Company will leverage this integration as a starting point to further advance the carbon credit distribution infrastructure. As institutional responses, including GX-ETS, progress, it will become increasingly important for companies not only to procure credits but also to understand price trends and utilize them strategically.
In response to these environmental changes, the Company will further strengthen collaborations with local governments and financial institutions to promote the construction of an ecosystem that comprehensively supports credit creation, procurement, trading, and management. Furthermore, by expanding data linkage utilizing APIs, we will contribute to improving market transparency and enhancing decision-making.
The Company will continue to contribute to the development of the carbon credit market, aiming to realize a society where companies can achieve both environmental compliance and business growth.
About the Tokyo Carbon Credit Market
・Website: https://carbon-market.metro.tokyo.lg.jp/
・Eligible Users: Domestic corporations, voluntary organizations
・Registration/Usage Fee: Free
・Credits Handled: J-Credits, overseas voluntary credits
About "Carbon EX"

1. Wide Range of Global Carbon Credits
A wide range of credits, including voluntary carbon credits, J-Credits, non-fossil certificates, and overseas renewable energy certificates, can be bought and sold. Available in both Japanese and English versions, it can be used by overseas companies. Furthermore, access to carbon credits worldwide is available 24 hours a day, 365 days a year.
2. High Reliability of Carbon Credits
Carbon EX conducts screening processes such as KYC*. As an exchange that handles high-quality voluntary carbon credits, we ensure the quality of credits by collaborating with credit evaluation organizations and companies.
3. Provision of Carbon Credit Creation and Purchase Consulting
We provide support to domestic and international voluntary carbon credit creation businesses, and offer explanations and proposals for credit types tailored to customers' objectives and needs. We support PR and brand enhancement by publicly disclosing companies' carbon offset initiatives.
Furthermore, by linking carbon credits bought and sold on Carbon EX with "ASUENE," a cloud service for visualizing, reducing, and reporting CO2 emissions, we can enhance customer convenience and provide proposals and consulting services for appropriate carbon credit offsetting.
About Carbon EX
Company Name: Carbon EX Inc.
Representatives: Kohei Nishiwada, Shunsuke Takeda
Location: WeWork 4F, KDX Toranomon 1-chome Building, 1-10-5 Toranomon, Minato-ku, Tokyo
Capital: 400 million JPY (including capital reserve)
Shareholder Composition: ASUENE Inc. 51%, SBI Holdings, Inc. 49%
FAQ
What changes will the partnership between Carbon EX and the Tokyo Carbon Credit Market bring?
Companies in Tokyo will be able to purchase diverse credits handled by Carbon EX through the Tokyo Market, enhancing procurement options and convenience.
What benefits does this partnership offer to SMEs?
The simplified credit transaction process and resolved information dispersion will make it easier for SMEs to utilize carbon credits.
What is the future outlook for the carbon credit market?
With the full-scale operation of GX-ETS approaching, market liquidity and transparency will further improve, leading companies to utilize credits more strategically.