WASHINGTON — President Donald Trump on Tuesday announced plans for a $33 billion natural gas-fired power plant in southern Ohio, describing it as the largest gas generation project in U.S. history and a cornerstone of a broader $550 billion investment commitment from Japan.

The Ohio facility, to be built near Portsmouth, is part of the first group of projects under a new U.S.-Japan trade agreement aimed at strengthening economic and national security ties between the two countries.

Under the agreement, Japan has committed to invest $550 billion in the United States. In exchange, U.S. tariffs on Japanese imports will be reduced to 15%. Trump said the deal is designed to revitalize American industry and boost domestic energy production.

The Ohio power plant represents the largest of three initial investments totaling $36 billion. The others include a $2.1 billion deepwater crude oil export facility in Texas and a $600 million synthetic industrial diamond manufacturing plant in Georgia.

The Ohio plant will have a planned capacity of 9.2 gigawatts, roughly equivalent to the output of about nine nuclear reactors. At full capacity, it could generate enough electricity to power all homes in Ohio or approximately 7.4 million homes across the PJM Interconnection grid, the nation’s largest regional transmission organization.

Administration officials said the project is intended to strengthen grid reliability, expand baseload power generation, and support surging electricity demand driven by data centers and artificial intelligence applications.

SB Energy, a subsidiary of Japan’s SoftBank Group, is expected to operate the plant. SoftBank will play a central role in its design and construction. Japanese companies, including Toshiba, Hitachi, and Mitsubishi Electric, may participate in transmission and distribution components, while U.S.-based GE Vernova could supply gas turbine equipment.

The project is in early development stages, and specific construction and completion timelines have not been announced.

The administration said the broader trade framework is expected to create hundreds of thousands of jobs nationwide, though specific employment figures and pay for the Ohio facility have not been detailed.

The announcement comes as U.S. natural gas demand is projected to rise sharply through 2035, driven largely by energy-intensive computing infrastructure.

Additional details are expected as U.S. and Japanese officials move forward with formal agreements and regulatory filings in the coming months.