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Billionaire Profile
Masayoshi Son
Global Rank
#31

Image: Masaru Kamikura from Japan | CC BY 2.0 | via Wikimedia Commons

Masayoshi Son

CEO, Telecom
JAPAN
Real-Time Net Worth
$67.094B
Estimated based on Telecom stock value as of August 8, 2026
-2.32% (24h)
Age
68
Source
Telecom, Investments
Industry
Telecom
Citizenship
JAPAN

Biography

Masayoshi Son is a prominent Japanese entrepreneur, investor, and philanthropist. As the founder and CEO of SoftBank Group, he has significantly shaped the landscape of technology and investments. His source of wealth stems from Telecom and Investments. Born in Japan in 1957 to Korean parents, Son's career began with software distribution before he expanded into publishing and telecommunications. His achievements include building SoftBank into a global technology investment group and early investments in companies like Alibaba. Son's current net worth is estimated at $51.0 billion, making him one of the wealthiest individuals in Japan and globally.

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Data Updated
8/8/2026
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Wealth Over Time

Career Milestones

  1. 1

    Founded SoftBank

    Established SoftBank as a software distributor in Japan.

  2. 2

    Investments in Internet Firms

    Made large investments in Internet services and the new economy, including Yahoo! Japan.

  3. 3

    Investment in Alibaba

    Invested $20 million in Alibaba, a pivotal investment that yielded massive returns.

  4. 4

    Entrepreneur of the Year

    Named Entrepreneur of the Year at The Asian Awards.

  5. 5

    Time's 100 Most Influential People in AI

    Included in Time's 100 Most Influential People in AI list.

Net Worth History

YearNet Worth
2026$67.094B
2025$51.5B
2024$51B
2021$45.4B

Philanthropy

Tōhoku Earthquake and Tsunami Relief

$$0.1B
Disaster Relief

Pledged 10 billion yen to support victims.

Portfolio Holdings

SoftBank Group Corp.

SoftBank Group Corp.

9984.TFinance Investments
Ownership
29.95%
Market Cap
$200B
Revenue
$37B
Tokyo, Japan
23,449 employees
Founded 1981
T-Mobile US

T-Mobile US

TMUSTelecom
Ownership
7.6%
Market Cap
$232.4B
Stock Price
$211.26
Bellevue, Washington
75,000 employees
Founded 1994
Alibaba Group

Alibaba Group

BABATechnology
Ownership
14.2%
Market Cap
$187B
Stock Price
$72.05
Revenue
$137.3B
Hangzhou, Zhejiang, China
219,260 employees
Founded 1999
Arm Holdings

Arm Holdings

ARMSemiconductors
Ownership
87.1%
Cambridge, UK
Founded 1990

In-Depth Profile

Early Life

Masayoshi Son was born Masayoshi Yasumoto on August 11, 1957, in Tosu, Saga Prefecture, Japan, to Zainichi Korean parents. His grandfather moved to Japan during the Japanese colonial period. Son faced discrimination due to his Korean background. At 16, he moved to the United States to study, graduating from the University of California, Berkeley, with a degree in Economics.

Rise to Success

Son founded SoftBank in 1981 as a software distributor. He saw an opportunity in the fragmented Japanese software market. The company expanded into publishing and telecommunications. Son's vision led to investments in internet services and the so-called new economy in the 1990s. A pivotal investment was in Alibaba in 1999, which yielded substantial returns when it went public. SoftBank's early investments in the internet and telecom sectors laid the foundation for its future growth.

Key Business Strategies

SoftBank's key strategies include aggressive investment in technology, particularly in AI and related sectors. Son is known for his bold investment moves, sometimes resulting in major losses, especially with the Vision Funds. SoftBank has made strategic partnerships and investments in AI, including the $500 billion Stargate Project. The company continues to focus on AI-based technology, including investments in OpenAI.

Philanthropy

Son is known for assisting disaster victims and fostering young talent. He pledged 10 billion yen to support the 2011 Tōhoku earthquake and tsunami victims.

Career Milestones

1981

Founded SoftBank

Established SoftBank as a software distributor in Japan.

1990s

Investments in Internet Firms

Made large investments in Internet services and the new economy, including Yahoo! Japan.

1999

Investment in Alibaba

Invested $20 million in Alibaba, a pivotal investment that yielded massive returns.

2017

Entrepreneur of the Year

Named Entrepreneur of the Year at The Asian Awards.

2024

Time's 100 Most Influential People in AI

Included in Time's 100 Most Influential People in AI list.

Philanthropy & Social Impact

Disaster Relief

Tōhoku Earthquake and Tsunami Relief

$0.1B

Pledged 10 billion yen to support victims.

Business Philosophy & Leadership

Notable Quotes

"Life is too short to do anything small."

Leadership Principles

Visionary Leadership

Son is known for his bold vision and ability to anticipate technological trends.

Risk-Taking

He is known for taking big risks with his investments, even if it means facing big losses.

Sources & References

  1. Masayoshi Son — Forbes profile Forbes