Part I — The story
The story
Masayoshi Son, a Korean-Japanese entrepreneur who faced discrimination growing up, built SoftBank into a telecom and technology investment colossus defined by audacity on a scale few can stomach. His most legendary bet was an early $20 million investment in Alibaba that grew to be worth tens of billions — one of the greatest venture returns in history. He thinks in decades and centuries, famously declaring 300-year visions, and makes concentrated bets of staggering size.
Son's approach is the opposite of diversified caution: enormous, high-conviction wagers on his vision of the future, especially in the internet and later artificial intelligence. That boldness has produced both spectacular wins and catastrophic losses — he reportedly lost around $70 billion in the dot-com crash, more than almost anyone in history, and his Vision Fund has seen wild swings. He is a study in extreme conviction investing: the outsized returns it can produce, and the brutal volatility and risk that are its inseparable price.
Part II — The playbook
The playbook
Make concentrated, high-conviction bets
Son wagers enormous sums on his vision rather than diversifying cautiously.
Think in decades, not quarters
His 300-year vision frames bets on where the world is heading long-term.
Accept volatility as the price
His huge wins came inseparable from catastrophic losses.
In their words
I have a 300-year vision.
If you're afraid of making mistakes, you can't do anything bold.
It's not about the money. It's about the vision.
What to read next
- Aiming High — Atsuo Inoue
Why this matters
The thinking behind these decisions connects to models you can study directly:
Frequently asked questions
What was Masayoshi Son's best investment?
An early ~$20 million stake in Alibaba that grew to be worth tens of billions — one of the greatest venture returns in history.
What defines Son's investing style?
Extreme, concentrated, high-conviction bets on his long-term vision — producing both spectacular wins (Alibaba) and catastrophic losses (~$70B in the dot-com crash). Boldness and volatility are inseparable.