Who Is The Japanese Trader Who Made Millions

By Trading Automation 15 September 2026

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Takashi Kotegawa, widely known by his online alias BNF, is the legendary Japanese day trader who turned roughly $13,600 into over $150 million. 

The Rise of BNF

• The Start: He began trading in 2000 as a university student with about 1.6 million yen (approx. $13,600). 
• The Location: He traded entirely from his small apartment in Tokyo or Chiba using just monitors and an internet connection. 
• The Growth: In less than eight years, he compounded his initial savings into more than 18 billion yen (over $150 million). 

The Legendary J-Com Trade

• The Mistake: On December 8, 2005, a Mizuho Securities employee made a massive "fat-finger" typo during an IPO. 
• The Error: They tried to sell 610,000 shares for 1 yen each instead of 1 share for 610,000 yen. 
• The Profit: Kotegawa spotted the mistake instantly, bought thousands of shares, and cashed out a profit of roughly $17 million in a matter of minutes, earning the nickname "J-Com Man". 

Trading Strategy and Lifestyle

• Momentum & Dips: He focused on short-term Japanese equities on the Tokyo Stock Exchange, buying fast crashes in fundamentally sound companies during market panic. 
• Simple Living: Despite his massive fortune, he avoided extreme lifestyle inflation, preferring a quiet, modest life focused strictly on the market. 

Watch a summary of how Takashi Kotegawa built his fortune and executed his famous trades: 

59s

The Day Trader Who Broke Japan's Stock Market

239K views · 7 months ago

YouTube · KonichiValue

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