Qui est Masayoshi Son ?
Born in Japan on August 11, 1957, Fils de Masayoshi is a Japanese entrepreneur, investor, and billionaire best known as the founder, chairman, and CEO of SoftBank Group. Over several decades, Son has built SoftBank from a software distribution company into one of the world’s most influential technology investment groups.
Son studied in the United States at the University of California, Berkeley, where he developed an early interest in technology and entrepreneurship. He founded SoftBank in 1981 and later became known for bold investments in internet, telecom, mobile, robotics, semiconductors, and artificial intelligence.
Il est marié à Masami Ohno, and the couple have two children. Although Son keeps much of his private life out of the public spotlight, his business decisions have made him one of Japan’s most recognizable global entrepreneurs.
Points clés à retenir:
- Masayoshi Son is the founder, chairman, and CEO of SoftBank Group, one of Japan’s most important technology investment companies.
- He was born in 1957 and studied at the University of California, Berkeley before returning to Japan to build SoftBank.
- SoftBank became famous for major investments in companies such as Alibaba, Yahoo Japan, Arm, Sprint, WeWork, Uber, and OpenAI.
- The SoftBank Vision Fund was launched as one of the world’s largest technology-focused investment funds.
- Son has shifted SoftBank’s strategy strongly toward artificial intelligence, semiconductors, data centers, and AI infrastructure.
- SoftBank completed a reported $41 billion investment in OpenAI in 2025 and has been linked to the $500 billion Stargate AI infrastructure project.
- Masayoshi Son’s net worth changes significantly with SoftBank’s share price and the value of major holdings such as Arm and OpenAI.
- Rumors have linked Son to Motor Yacht A, but public reporting continues to associate the A yachts with Andrey Melnichenko.
SoftBank : la centrale de l'investissement technologique
SoftBank started in 1981 as a software distribution company and later expanded into publishing, telecom, internet services, mobile communications, and global technology investing. Under Masayoshi Son’s leadership, SoftBank became known for taking large, high-conviction positions in companies that Son believed could shape the future.
One of Son’s most famous investments was SoftBank’s early backing of Alibaba. The investment became one of the most successful technology bets in history and helped turn SoftBank into a global investment powerhouse.
SoftBank’s portfolio has included major names such as Arm Holdings, Sprint, Yahoo Japan, Uber, Coupang, DoorDash, PayPay, WeWork, and many other technology companies. Some investments were highly successful, while others, especially during the Vision Fund era, created large losses and criticism of Son’s aggressive investment style.
The SoftBank Vision Fund
Le SoftBank Vision Fund became one of the largest technology-focused investment funds ever created. It was designed to invest in companies working in artificial intelligence, robotics, logistics, mobility, fintech, e-commerce, and other fast-growing sectors.
The Vision Fund made Son one of the most powerful figures in global venture capital. However, it also brought major volatility. Investments in companies such as WeWork and other start-ups drew criticism when valuations fell sharply. Despite these setbacks, Son has continued to pursue a long-term strategy focused on artificial intelligence and what he often describes as the coming age of “artificial super intelligence.”
Arm Holdings and the AI Chip Strategy
One of SoftBank’s most important assets is Arm Holdings, the British chip design company acquired by SoftBank in 2016. Arm’s technology is used in smartphones, servers, connected devices, and increasingly in artificial intelligence infrastructure.
Arm has become central to Son’s AI strategy. As demand for AI computing grows, SoftBank has positioned Arm as a key part of the semiconductor and data center ecosystem. Reuters reported in 2026 that Arm CEO Rene Haas was expected to take on a senior role in SoftBank’s international business as the group pushed forward its AI chip strategy, including Project Izanagi. :contentReference[oaicite:1]{index=1}
OpenAI, Stargate and Son’s New AI Bet
In recent years, Masayoshi Son has moved SoftBank even more aggressively toward artificial intelligence. SoftBank and OpenAI announced a closer partnership in Japan, including a jointly held company called SB OpenAI Japan. The partnership was designed to bring advanced AI services into large Japanese companies, starting with SoftBank’s own group companies such as Arm and PayPay. :contentReference[oaicite:2]{index=2}
SoftBank also became a major backer of OpenAI. Reuters reported that SoftBank completed a $41 billion investment in OpenAI in late 2025, giving the Japanese group a stake of about 11% in the ChatGPT maker. Reuters also reported in March 2026 that SoftBank secured a $40 billion bridge loan to support further OpenAI investment and general corporate purposes. :contentReference[oaicite:3]{index=3}
Son has also been linked to the Porte des étoiles project, a large-scale AI infrastructure initiative involving SoftBank, OpenAI, and Oracle. The project has been described as a plan to invest up to $500 billion in artificial intelligence infrastructure in the United States, with Son also suggesting that Stargate could expand to Japan and other countries. :contentReference[oaicite:4]{index=4}
La richesse de Masayoshi Son
Masayoshi Son’s valeur nette has fluctuated dramatically over the years because much of his fortune is tied to SoftBank’s share price and the value of its major investments. He has been one of Japan’s richest people for many years, but his wealth has risen and fallen with the performance of Alibaba, Arm, the Vision Fund portfolio, and SoftBank’s newer AI investments.
Recent public estimates often place Son’s fortune in the tens of billions of dollars, with figures commonly ranging from around $20 billion to more than $40 billion, depending on market conditions and the source used. His wealth can move quickly because SoftBank’s listed share price and Arm’s market value are highly sensitive to investor sentiment around artificial intelligence and technology stocks.
Vie familiale et privée
Masayoshi Son is married to Masami Ohno. The couple reportedly met while Son was studying in the United States and have two daughters. Compared with many other billionaires, Son keeps his family life relatively private and is better known publicly for his business strategy, technology vision, and high-profile investments.
Rumeurs sur Motor Yacht A
Over the years, rumors have circulated that Masayoshi Son may have purchased Yacht à moteur A. However, these claims have never been supported by clear public evidence. Representatives linked to the yacht’s known owner, Andreï Melnitchenko, have previously disputed claims that the yacht was sold to Son.
It is important to distinguish between Yacht à moteur A et Sailing Yacht A (Voilier A), two famous yachts associated with Melnichenko. Recent yacht-industry reporting continues to identify Sailing Yacht A (Voilier A) as belonging to Andrey Melnichenko and states that it remains under arrest in Trieste, Italy, following EU sanctions action in 2022. :contentReference[oaicite:5]{index=5}
For that reason, the claim that Masayoshi Son owns Motor Yacht A should be treated as an unconfirmed rumor rather than a verified fact.
Conclusion
Masayoshi Son’s career is one of the most remarkable stories in modern technology investing. From founding SoftBank in 1981 to backing Alibaba, acquiring Arm, launching the Vision Fund, and making huge bets on OpenAI and AI infrastructure, Son has repeatedly placed himself at the center of major technology shifts.
His strategy has brought extraordinary gains as well as major losses, but Son remains one of the most influential figures in global technology, venture capital, and artificial intelligence. While yacht rumors continue to attract attention, his real legacy is tied to SoftBank’s role in shaping the future of telecoms, semiconductors, AI, and global tech investment.
Sources
wikipedia.org/wiki/Masayoshi_Son
forbes.com/profile/masayoshi-son
reuters.com – SoftBank completes OpenAI investment
reuters.com – SoftBank secures $40 billion loan
apnews.com – SoftBank and OpenAI set up AI partnership
megayachtnews.com – Seized Russian-owned yachts
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Il est le propriétaire du yacht à moteur A.
Maison Mashayoshi Son
Son vit dans un grand manoir à Tokyo, mais il a également acheté une grande maison à Woodside, en Californie.
Il était propriétaire d'un Gulfstream G650 jet privé avec l'immatriculation N251TD et un G550 avec l'immatriculation N251GV. Les deux avions avaient la même livrée. Des robots jets ont été vendus. Savez-vous quel jet appartient à M. Son ? Veuillez nous envoyer un message.
MISE À JOUR : Il est propriétaire d'un Gulfstream G650ER immatriculé N302TR. L'avion a été construit en 2017. Il appartient légalement à WILMINGTON TRUST CO TRUSTEE. Mais Son a donné une garantie pour le jet par l'intermédiaire de sa société holding personnelle Son Asset Management.
Les trois appareils ont – plus ou moins – la même livrée.
ROUES de yacht Rick Hendrick
Base de données des propriétaires de yachts
Base de données des propriétaires de yachts SuperYachtFan T3-26
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