Softbank CEO Masayoshi Son announced a $100 billion investment in the U.S. over the next four years during a Monday visit to President-elect Donald Trump’s residence at Mar-a-Lago in Palm Beach, Florida.

The billionaire investor and founder of the Japanese technology investment firm promised in the joint announcement with Trump to create at least 100,000 jobs focused on artificial intelligence and related infrastructure. The money will be deployed before the end of Trump’s term in office.

“My confidence in the United States economy has increased tremendously as a result of his victory,” Son said. “President Trump is a dual president. I’m going to have to double down.”

Softbank’s Son and Trump made a similar announcement in 2016, after Trump was first elected president. The Japanese company agreed to invest $50 billion in the United States to create 50,000 jobs.

“He is doing this because he has been very optimistic about our country since the election,” Trump said. “This historic investment is a monumental demonstration of confidence in America’s future and will help artificial intelligence, new technologies and other industries of tomorrow emerge and grow here in the United States.”

Funding could come from various sources controlled by Softbank, including the Vision Fund, capital projects or chipmakers Arm stockswhere the company is the majority owner. Some of the money won’t necessarily be new, but could include previously announced funding, such as Softbank’s recent $1.5 billion investment in OpenAI, the technology company behind chatbot ChatGPT.

The investment was first reported by CNBC’s Sara Eisen.