President Trump said Wednesday he's allowing South Korea to build a nuclear-powered submarine in Philadelphia.

South Korean President Lee Jae Myung and Japan’s new Prime Minister Sanae Takaichi on Thursday pledged to strengthen ties between the neighbors, whose relations have long been strained by their bitter

It's unclear what the timeline for such a project would be. The announcement follows trade negotiations between the countries, including Korean investment in U.S. shipbuilding.

The United States will share nuclear-powered submarine technology with South Korea, President Donald Trump said Thursday, announcing the move on social media after meeting with South Korean President Lee Jae Myung.

The U.S. will share closely held technology to allow South Korea to build a nuclear-powered submarine, President Donald Trump said ahead of a meeting with China’s leader Xi Jinping.

President Trump was presented with a replica of a gold crown upon his arrival in South Korea on Wednesday. On “The Daily Show,” Desi Lydic referred to the event as “a ‘yes, king’ rally for Trump,” as the president “continues to eat, pray, love his way through Asia.”

South Korea's prime minister put his political weight behind his country's multi-billion dollar bid to sell Canada submarines. Kim Min-seok accompanied his Canadian counterpart, Mark Carney, on a tour of the Hanwha Ocean Ltd.

Hybe shares gained as much as 7.12% on Thursday, marking a gain of about 915 billion won ($644 million) in market cap.