Google advances toward 24/7 carbon-free energy globally at 66%, but Japan remains at 17% — what should Japan do to raise its hourly matching rate?
Google advances toward 24/7 carbon-free energy globally at 66%, but Japan remains at 17% — what should Japan do to raise its hourly matching rate?
Google has released its 2025 Environmental Report, outlining progress toward its ambition to match electricity consumption with carbon-free energy on an hourly basis across all operations. As of 2024, the company has achieved a global average of 66% carbon-free energy (CFE), with 9 out of 20 grid regions reaching at least 80% hourly matching. In the announcement, this effort is framed not merely as a procurement strategy, but as a pathway to reshaping power systems toward real decarbonization.
Uneven progress across regions
A closer look reveals significant regional divergence. Latin America leads at approximately 92%, followed by Europe in the 80% range and North America at around 70%. In stark contrast, Asia-Pacific averages just 12%, underscoring structural challenges in achieving hourly matching.
At the country level, Japan (TEPCO) stands at approximately 17%, Taiwan at 17%, and Singapore at only 4%. Other Asian markets such as India and Indonesia similarly remain in the lower tiers. Meanwhile, European markets demonstrate what is possible under more favorable conditions: Finland reaches approximately 98%, Denmark exceeds 90%, and countries such as the Netherlands and Belgium maintain levels in the 80% range. These differences highlight how resource availability, policy frameworks, and market design directly shape outcomes.
What hourly matching does, fundamentally, is expose these disparities. Unlike annual accounting, it reveals when and where clean energy is actually insufficient, making structural constraints impossible to ignore.
How Google defines hourly matching
Google’s concept of 24/7 CFE is not tied to a single procurement instrument. Instead, it is defined by the ability to match electricity demand with carbon-free supply on an hourly basis within the same grid. Corporate PPAs play a central role, but they are complemented by time-based energy attribute certificates (T-EACs), which enable hourly tracking and verification.
Traditional annual EACs alone are not considered sufficient, as they fail to ensure temporal alignment. Retail electricity products may play a role if they provide granular tracking and credible certification, but in practice, Google relies on a hybrid model combining PPAs, certificates, and data infrastructure. The emphasis is therefore not on the contractual form, but on whether temporal, spatial, and physical alignment can be achieved in an integrated manner.
The growing importance of demand-side flexibility
Google places increasing emphasis on demand-side measures alongside supply procurement. This includes shifting computing workloads and leveraging demand response to align electricity consumption with low-carbon hours.
For companies seeking to adopt hourly matching, this represents a critical shift in perspective. The question is no longer how much renewable energy is procured, but when it is consumed. However, modifying demand patterns introduces operational complexity, requiring trade-offs with business constraints and user expectations. As a result, implementation is far from straightforward and demands careful system-level design.
Structural barriers in technology and markets
The report identifies multiple barriers to progress, including limited availability of carbon-free energy, delays in grid interconnection, fragmented market structures, and regulatory constraints. Rapid growth in electricity demand driven by AI further complicates the picture, making it increasingly difficult to align decarbonization with expansion.
To address these challenges, Google is advancing a range of solutions: scaling T-EACs, investing in dispatchable clean energy such as geothermal and small modular reactors, and expanding real-time emissions data platforms. In Europe, the company is also actively supporting the development of Granular Guarantees of Origin and engaging in policy design to accelerate market evolution.
Long-term direction and implications
Google identifies 80% hourly matching as a meaningful threshold at which system-level decarbonization effects begin to materialize. Achieving this requires diversified energy portfolios that combine renewables, storage, and firm low-carbon generation.
Japan’s position within this landscape is particularly instructive. At approximately 17%, it remains one of the most challenging environments for hourly matching. This reflects not only limited renewable supply, but also constraints related to land availability, grid infrastructure, and market maturity.
For Japanese companies, pursuing hourly matching will inevitably require engagement with additional, high-impact corporate PPAs. Yet even for Google, with its scale and resources, progress has proven difficult. This underscores the need for a broader strategy that integrates demand-side flexibility, portfolio diversification, data-driven optimization, and active participation in market and policy development.
In this context, hourly matching is not simply an environmental initiative. It represents a fundamental rethinking of how electricity is procured, consumed, and valued. For companies operating in constrained markets, incremental progress—through demand shifting, collaborative procurement, and gradual improvement in temporal alignment—may offer the most pragmatic path forward.