Takashi Kotegawa: How a Japanese trader created $150 million from $13,600

The world of day trading has its heroes, and one of them is undoubtedly Takashi Kotegawa. This Japanese trader is not only known for his astronomical profits but also for the humility with which he handles his unprecedented success. Starting with only $13,600, Kotegawa turned his small bedroom into a trading hub and made about $150 million in eight years—a feat that catapulted him into the top tier of trading legends.

Takashi Kotegawa’s Revolutionary Trading Method

Takashi Kotegawa began his trading journey in early 2001 at the Japanese stock exchange, just as the dot-com bubble burst. This was no coincidence but strategic luck. While most traders were surprised by falling prices, Kotegawa saw the opportunity: the bear market that lasted until 2003 created ideal conditions for short sellers and those looking to capitalize on quick bounces.

His method was simple yet brilliant. Kotegawa relied on a combination of classic technical indicators: he monitored Bollinger Bands and the RSI (Relative Strength Index) to identify oversold conditions. The key rule was precise: he bought stocks that were at least 20% below their 25-day moving average. These heavily undervalued stocks often rebounded quickly—sometimes within the same trading session.

Kotegawa emphasized repeatedly that the secret was in simplicity: while bear markets targeted setbacks, he quickly reacted to the subsequent correction movements. He often held positions only for hours or overnight to profit from short-term price spikes. This aggressive strategy demanded absolute discipline—and Kotegawa had plenty of it.

Takashi Kotegawa’s Practical Strategy

To understand how Kotegawa might have acted in practice, let’s look at a hypothetical example. Imagine you’re watching Alibaba (BABA) during a volatile trading phase. On March 15, 2022, the stock dropped to $73.12—well below its moving average of about $98.

The RSI indicator at that moment would be around 24, signaling strong overselling. According to Kotegawa’s method, this was the opportunity. As soon as a small positive signal appeared—such as a green candle on the H4 chart indicating a potential trend reversal—a trader following Kotegawa’s approach would open a long position.

The stop-loss would be tight and precise. The profit would be realized once the stock returned to its previous level or broke above it—happening in this case with a strong gap-up the next morning. Kotegawa would have already taken most of his profit, possibly holding only a fraction of the position overnight.

This strategy requires constant attention, quick decision-making, and nerves of steel—qualities that Takashi Kotegawa possessed in abundance.

The Immortal Trade: Kotegawa’s $400 Million Day

When talking about Takashi Kotegawa, it’s impossible to ignore the one trade that made him a legend. The year 2005 changed his life forever. The Japanese company J-Com Holdings had just gone public, and Kotegawa sat at his desk in his bedroom, watching tick entries as usual.

Then it happened: a trader at Mizuho Securities—one of Japan’s largest securities firms—made a catastrophic mistake. He placed a sell order for 610,000 shares at 1 Yen each instead of selling 1 share for 610,000 Yen. This was a cosmic error that immediately sent J-Com’s stock into free fall.

Kotegawa recognized the absurdity instantly. With lightning-fast reflexes, he bought 7,100 shares at the manipulated prices. When the market realized the mistake and canceled the order, the stock surged upward. That day, Kotegawa earned $17 million—which, adjusted for inflation, is about $400 million today. This incredible trade earned him the nickname “J-Com Man” and made him immortal in trading folklore.

It’s important to understand: this mega-trade was not primarily the result of superior strategy but a combination of awareness, speed, and extreme luck. Such errors are now virtually impossible thanks to electronic trading safeguards. Still, this trade highlights a core skill of Kotegawa: the ability to recognize anomalies and act immediately.

Takashi Kotegawa as a Trading Role Model: More Than Just Profits

But what truly makes Takashi Kotegawa a legend? It’s not just that he multiplied his initial capital by a factor of 11,000 in eight years. It’s how he handles his wealth.

Despite a fortune that could support most people for generations, Kotegawa remains radically modest. He gives hardly any interviews, avoids public attention, and consciously maintains a low profile. There are few photos of him online—a deliberate step to preserve his privacy.

He doesn’t flaunt his wealth. No luxury sports cars, no jewelry collections, no mega-yachts. The only significant investment in his lifestyle was a new apartment—apparently, his original bedroom-trading office had become too cramped over time. This modesty reflects a deeper truth: Takashi Kotegawa trades not primarily for money but out of pure love for trading itself. Profit is for him a byproduct, not the goal.

This is the central lesson Takashi Kotegawa offers every modern trader: success in day trading doesn’t come from greed or the pursuit of quick riches but from discipline, patience, technical excellence—and unwavering emotional control. Kotegawa embodies these qualities like few others. His story remains a timeless inspiration in a market constantly bombarded with illusions and promises.