TOKYO, Feb 3 (Reuters) - SoftBank Group CEO

Masayoshi Son said on Monday he has agreed with OpenAI CEO Sam

Altman to set up a joint venture in Japan to offer artificial

intelligence services to corporate customers.

Son is moving to deepen his exposure to OpenAI, with

SoftBank looking at investing $15 billion to $25 billion in the

company, Reuters reported last week.

SoftBank is also committing $15 billion to Stargate, a joint

venture with OpenAI and Oracle to build AI capacity in

the U.S., Reuters has reported.

The Stargate launch last month saw Son make his second

appearance with Donald Trump since his election as president in

November.

Japanese Prime Minister Shigeru Ishiba is yet to meet Trump

in person with a meeting planned for this week.