"We're discussing with the guys at Yahoo Japan about it. We've started considering whether it could be done in Japan too," Son said in a television interview late on Monday.
Neumann was locked in a fierce legal battle at the time with SoftBank over a $3 billion deal for a portion of his and other investors' stake in the office space-sharing company.
Ranadivé's SPAC had been looking for an acquisition target after raising $420 million in an IPO in August.
It marks a steep drop from the $47 billion that WeWork was valued for a listing in 2019, ahead of a botched listing plan that imploded due to investor concerns over its business model and its founder Adam Neumann's management style.
The startup told prospective investors it lost about $3.2 billion last year as part of a pitch for a stock market listing by merging with a special purpose acquisition company.
Monex Group, owner of bitcoin exchange operator Coincheck, surged 11.08% as bitcoin jumped after Tesla Inc revealed it had bought $1.5 billion of the cryptocurrency and would soon accept it as a form of payment for cars.
SoftBank Group was down 0.32 percent at 1,414 yen on profit-taking after it said net profit rocketed to $11.1 billion in the third quarter, as stock rallies and asset sales helped solidify its recovery.
Net profit for October-December hit 1,171.9 billion yen, more than 21 times higher than the 55.0 billion yen reported a year earlier, the conglomerate said.
Miyauchi will take the post of chairman of the board from Son, who will remain on the board and whose investment juggernaut is the telco's largest shareholder.
SoftBank Group dropped 1.8% after China launched an investigation into Alibaba Group for suspected monopolistic behaviour and will summon its Ant Group to meet in coming days.
Advantest, a major producer of chip-testing tools, surged 2.49 percent to 7,400 yen. Tokyo Electron, a producer of equipment to make semiconductors, rose 1.41 percent to 36,560.
SoftBank Group was down 1.13 percent at 8,393 yen following reports that it applied for an initial public offering of a special purpose acquisition company (SPAC) called SVF Investment to raise up to $525 million.