On April 1, Japan flips a switch that could reshape how Article 6 carbon credits flow around the world. The country's Green Transformation Emissions Trading Scheme — the GX-ETS — becomes mandatory for roughly 300 to 400 large emitters, covering about 60% of Japan's total greenhouse gas emissions. That alone would be significant. But it's one specific design choice that makes this a story worth paying attention to.
Companies covered by the GX-ETS can use credits from Japan's Joint Crediting Mechanism to meet up to 10% of their compliance obligations. JCM credits come from bilateral projects in developing countries — the same kinds of projects that generate ITMOs under Article 6.2 of the Paris Agreement. In other words, Japan just built a pipe connecting its domestic compliance market to international carbon cooperation.
Why This Changes the Demand Picture
Until now, JCM credits existed in a somewhat ambiguous space. They were valued, certainly — Japan has been running the JCM since 2013 across more than 20 partner countries. But they didn't have the compliance pull that drives serious, sustained demand. That changes in April.
When a steel manufacturer or power company needs JCM credits to stay within their emissions cap, the dynamic shifts from voluntary interest to mandatory procurement. And that procurement needs to happen at volumes and timelines that the market hasn't been asked to deliver before.
The Article 6 Connection
Japan's JCM projects generate emission reductions in partner countries like Thailand, Indonesia, Vietnam, and others. These reductions can be structured as ITMOs — Internationally Transferred Mitigation Outcomes — under Article 6.2 of the Paris Agreement, complete with corresponding adjustments to both countries' emissions inventories.
Switzerland completed the first-ever ITMO transfer in January 2024 (1,916 units from Thailand), and the UNDP is currently preparing a Call for Proposals targeting 1.8 million ITMOs through Swiss bilateral agreements. Japan's compliance demand could add another substantial layer of buying pressure on the same pool of host-country project capacity.
For countries sitting at the intersection of multiple bilateral relationships — Thailand is a good example, with both Swiss and Japanese agreements in place — the project development pipeline just became more competitive. Developers will need to make decisions about which buyer-country channel offers the best combination of pricing, certainty, and verification requirements.
What This Means for dMRV
Compliance buyers operate under different scrutiny than voluntary buyers. When a regulated Japanese emitter submits JCM credits against its GX-ETS obligation, the underlying emission reductions need to withstand regulatory verification — not just third-party auditing, but government-level accountability.
This is where digital MRV becomes more than an efficiency play. Continuous monitoring, sensor-based data collection, and automated reporting aren't optional features in a compliance-grade credit supply chain. They're the infrastructure that gives both the host country and the buyer country confidence in what's being transferred.
For project developers working in JCM partner countries, investing in robust dMRV systems isn't just about reducing verification costs. It's about meeting the quality bar that compliance demand requires — and being first in line when that demand materialises.
Looking Ahead
Japan's GX-ETS is scheduled to begin its first accounting period in fiscal year 2026. The real test will come when companies start making procurement decisions for JCM credits later this year. If demand outstrips the current supply of verified JCM projects, expect to see forward purchase agreements, new project development in partner countries, and — possibly — upward pricing pressure on bilateral credits.
Other compliance markets are watching, too. If Japan's JCM integration works smoothly, it creates a template for other countries to link their domestic carbon pricing to Article 6 bilateral projects. The EU's CBAM, Singapore's carbon tax, and South Korea's ETS could all eventually incorporate similar bridges.
One thing is clear: the days when Article 6 was a theoretical framework discussed at COPs are ending. Japan just turned it into a compliance obligation.