Masayoshi Son’s latest comeback, fueled by high-stakes bets on artificial intelligence, has sent his fortune to new heights.

SoftBank Group Corp Chief Executive Masayoshi Son said on Tuesday he is sitting on about $80 billion in cash for investment opportunities and share buybacks, and vowed to stick with his famously big ...

SoftBank's acquisition of ABB's robotics units reflects billionaire Masayoshi Son's renewed interest in robots. The company was behind the development of humanoid, Pepper, which was unveiled in 2014.