SoftBank founder Masayoshi Son’s wealth soars to $55.1 billion, overtaking Uniqlo’s Tadashi Yanai, as his bold AI investments drive massive gains.
Masayoshi Son, the Founder and Chief Executive of SoftBank Group Corp., has overtaken Uniqlo billionaire Tadashi Yanai to become Japan’s richest person, marking a remarkable turnaround fueled by his company’s growing influence in artificial intelligence.
According to the Bloomberg Billionaires Index, Son’s fortune surged 248% this year to reach $55.1 billion as of Wednesday October 26, 2025. The leap places him roughly $23 million ahead of Yanai, the longtime leader of Japan’s wealth rankings and chairman of Fast Retailing Co., Uniqlo’s parent company.
Son’s resurgence underscores the shifting dynamics of Japan’s business landscape, where technology and innovation are increasingly outpacing traditional retail. His wealth recovery follows a challenging period for SoftBank, which faced steep losses from failed tech bets in recent years. However, Son’s renewed focus on artificial intelligence — through investments in chip design firm Arm Holdings and other AI-driven ventures — has reignited confidence in his vision for the future.
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The surge in SoftBank’s valuation and the strong performance of Arm, which Son has called the “core of the AI revolution,” have been central to his comeback. Arm’s shares have risen sharply since its listing on the Nasdaq in 2023, bolstered by demand from AI developers and semiconductor manufacturers seeking advanced computing power.
Tadashi Yanai, who built Fast Retailing into a global fashion powerhouse through the Uniqlo brand, had held the title of Japan’s richest person for much of the past decade. Despite solid performance in his retail empire, the pace of growth in the tech sector has far outstripped gains in consumer goods, pushing Son to the top spot for the first time in years.
Masayoshi Son, 67, founded SoftBank in 1981 as a software distributor before transforming it into a global investment conglomerate. His aggressive strategy — often criticized for its risk-taking — has also been celebrated for anticipating major technological shifts.
While Son has described his current focus on AI as a “once-in-a-lifetime opportunity,” analysts caution that the sector’s volatility could still test SoftBank’s resilience. For now, however, Son’s vision appears to be paying off — not only redefining his legacy but also signaling Japan’s growing role in the global race for artificial intelligence dominance.