SoftBank Group is returning to the overseas bond market for the second time this year amid an aggressive fundraising push for artificial intelligence, led by its bet on OpenAI.

The Japanese technology investment giant is looking to raise about $1.5 billion to $2 billion in the dollar debt market, and about €500 million ($580 million) from euro-denominated notes, according to people familiar with the matter. Details of the offering aren't set and could change.

A spokesperson for SoftBank said the issuance size isn't finalized as marketing of the deal is ongoing.

With a heavy emphasis on new AI investments, SoftBank’s billionaire founder Masayoshi Son has pledged as much as $500 billion for a project known as Stargate and announced a planned $30 billion stake in OpenAI earlier this year. Japanese companies have sold a record amount of overseas bonds this year, topping $100 billion, as they step up acquisitions and higher yen debt yields spurs caution in the local market.

SoftBank has raised at least $24 billion in loans and bonds so far in 2025, in one of the biggest-ever funding pushes by the company, compiled data shows. The company has been active in its home bond market too, in April pricing ¥600 billion ($4 billion) of notes that targeted individual investors, in one of the largest ever such issuances in the nation.

During a global investor call Tuesday, SoftBank’s management said the firm still plans to complete a $30 billion investment tranche in OpenAI by year-end, without providing a more specific timeline and declining to disclose its current stake in OpenAI, according to people familiar with the matter.