J-POWER and Mizuho Complete Hourly Matching Pilot Ahead of GHG Protocol Revision

J-POWER, Mizuho Bank, and three other companies announced the successful completion of a pilot project demonstrating “hourly matching,” which verifies that renewable electricity generation and consumption are aligned on an hourly basis(the matched volume was not disclosed).

Specifically, hourly electricity consumption data was collected from the target facilities and matched against power supply data from non-fossil generation sources such as solar and wind provided by ML Power (a wholly owned subsidiary of Mizuho Leasing) and J-POWER. The pilot also utilized an environmental value platform developed by J-POWER and Scalar to detect tampering of generation and consumption data and to create records and certifications verifiable by third parties. As a result, the companies verified: hourly alignment between generation and consumption, matching across multiple power sources, and the reliability and traceability of environmental values – confirming that 24/7-compatible corporate power purchase agreements (PPAs) meeting hourly matching requirements can be offered.

Building on this pilot project, the companies will jointly develop new solutions for 24/7 carbon-free energy (CFE)-compatible corporate PPAs. Mizuho Bank and Mizuho Securities aim to develop 24/7 CFE-compatible corporate PPA services/financial schemes, while J-POWER will conduct further technical verification, including supply-demand balancing, to facilitate the execution.

Behind the scenes, the GHG Protocol, the international standard for calculating corporate greenhouse gas (GHG) emissions, is expected to be revised as early as 2027. Listed companies and other corporations may no longer be able to count daytime solar generation toward emissions associated with nighttime operations under the framework by around 2030.

🔍 Shulman Commentary:

Although the GHG Protocol is not mandatory for companies in Japan, revisions that push toward hourly matching could still influence corporate strategies, particularly multinationals managing diversified international portfolios. J-POWER and Mizuho appear to be moving early to position themselves as solution providers for companies seeking to stay ahead of tightening global accounting expectations.