U.S. President Donald Trump announced Thursday that Washington will share its closely held nuclear technology with Seoul to allow it to build nuclear-powered submarines in the United States, a move that could have implications for Japan¡¯s own defense policies.

¡°South Korea will be building its nuclear-powered submarine in the Philadelphia Shipyards (officially known as Philly Shipyard), right here in the good ol¡¯ U.S.A,¡± Trump posted Thursday on his Truth Social account, referring to the commercial shipbuilder acquired by the Hanwha Group late last year as part of South Korea¡¯s ongoing investments in the U.S. shipbuilding industry.

¡°I have given them approval to build a nuclear-powered submarine, rather than the old fashioned, and far less nimble, diesel powered submarines that they have now,¡± Trump wrote.