By Sam Nussey and Anton Bridge TOKYO (Reuters) -SoftBank CEO Masayoshi Son's plan to invest billions in AI in the United States shows one way to handle the new Trump administration: go big and deal with the details later.

Masayoshi Son, the Japanese tycoon helming U.S. President Donald Trump's big new AI push, is the son of an immigrant pig farmer with a spectacular but also sketchy investment record. Trump's "friend Masa" was born in Japan in 1957 to ethnic Korean parents who scratched a living rearing chickens

U.S. President Donald Trump announced on January 21 that Japan's SoftBank Group, Open AI and Oracle will together

Shares of SoftBank Group Corp. jumped as much as 8.1% after US President Donald Trump announced a multi-billion dollar push by the Japanese company, OpenAI and Oracle Corp. to build AI infrastructure in the US.

US President Donald Trump on Tuesday announced a major investment to build infrastructure for artificial intelligence (AI) led by Japan’s Softbank Group Corp, cloud giant Oracle Corp and ChatGPT-maker OpenAI.

SoftBank Group shares jumped after the company and ChatGPT-maker OpenAI announced plans to invest up to half a trillion dollars in artificial-intelligence infrastructure in the U.S. Shares rose 8.8% to 10,060 yen, or equivalent to $64.69, on Wednesday in Tokyo, after climbing as much as 9.2% earlier, to their highest level since July.

The Trump Administration has announced an AI infrastructure joint venture in the U.S. named “Stargate,” comprised of OpenAI, SoftBank Group (OTC:SFTBF) (OTC:SFTBY), Oracle Corp (NYSE:ORCL), and Abu Dhabi’s MGX.

The joint venture will deploy US$100 billion “immediately” and have a goal of increasing to “at least” US$500 billion in AI projects, including data centers and physical campuses.

SoftBank CEO Masayoshi Son speaks at a White House press conference on President Donald Trump's plan for AI infrastructure investment. MASA SON, SOFTBANK: Oh, thank you. That would be helpful. That's good.

The $500 billion Stargate project will be critical to "maintain American leadership in AI," one of the partners said in a statement.

The president said it will be the largest AI infrastructure ever built and that it will help counter technology threats from China and other countries.