Just been diving into the history of Japan's most legendary traders, and honestly, the stories are wild. You've probably heard of BNF—the guy they call the God of Trading—whose real name is Takashi Kosukawa. Then there's CIS, equally notorious as the strongest individual investor. These two have been tight for years, and their paths to success are surprisingly similar.

Both started trading while still in university, grinding from basically nothing into managing over a billion in funds. But what really put them on the map was the infamous J-COM erroneous order incident. That day, CIS walked away with 600 million yen. Insane, right? BNF though? He made 2 billion yen in just 10 minutes. At that time's exchange rate, that's roughly 150 million yuan. In the Japanese trading world, where people are usually super secretive about their methods, both of these guys actually shared their strategies. And here's the thing—what they revealed has been studied and applied by countless traders since, and it's still relevant today.

Before BNF became known as a trend trader, he made his real name through contrarian investing. This was the strategy that took his account from small to 100 million yen. From 2000 to 2003, the internet bubble burst and global markets tanked. Japan got hit hard. Everyone was pessimistic, taking massive losses. But here's what most people missed: markets don't just fall straight down. Trends emerge from despair. Prices always bounce back after severe drops.

BNF's insight was that during these crashes, assets get massively undervalued compared to their actual worth. His move? Identify those beaten-down stocks and buy them during rebounds. Sounds simple, but it takes serious courage and tons of research. He specifically looked for stocks trading significantly below their 25-day moving average. Say a stock's 25-day average is 100 yen but it's trading at 80 yen—that's a negative deviation of 20%. When you see that kind of gap, it signals undervaluation. He'd buy there expecting a rebound. If a stock was at 120 yen with a 20% positive deviation, he'd stay cautious, knowing it might be overheated.

Different stocks and sectors need different deviation thresholds. Large caps, small caps, different industries—each has its own benchmark. That's how BNF calibrated his entries.

Then 2003 hit. The Japanese market shifted into an upward trend thanks to reforms and global recovery. BNF adapted instantly. His methods changed, and his wealth exploded—from 100 million yen to 8 billion. Now he was buying dips in downturns but riding trends in bull markets. The BNF trader approach became a masterclass in flexibility.

His actual trading style is pretty distinctive. He holds 20-50 stocks simultaneously, trading on two-day, one-night cycles. Buys during the day, decides to profit or cut the next morning, then moves to fresh targets. This diversification kills concentration risk. He's also brilliant at exploiting sector linkages. If one steel company starts rising, he'll buy the lagging competitors in that same sector, riding the entire industry wave up.

CIS brings a different but complementary philosophy. He doesn't have a rigid system, but his core principle is powerful: stocks that keep rising tend to keep rising, and stocks that keep falling tend to keep falling. That's it. That's trend trading at its core.

Here's where most people get it wrong. We naturally think of price movements like a coin flip—50-50 odds. When we see a stock rising hard, we think it's due for a drop. But markets don't work that way. They have strong momentum. When a stock's hot, it attracts more buyers, making strength compound and weakness deepen. You fight the market, you lose. Period.

CIS also warns against the "buy the dip" mentality. Yeah, a stock's rallying hard, and your instinct says wait for a pullback before entering. But what if that pullback never comes? In a true bull run, that hesitation can cost you the entire move. The fear of buying high keeps people out of winning trades.

When losses do happen, CIS advocates cutting them fast, not averaging down. Averaging down is throwing more money at a failed position—it's the opposite of risk management. The goal isn't a high win rate. It's overall account profit. Losses are inevitable. The skill is recognizing them early and cutting them small.

One thing both traders emphasize: don't get married to old rules. The market's a living system. Once a trading rule goes mainstream, it stops working. You need original thinking and sharp instincts. The real money gets made during crashes and crises—when everyone else is panicking and frozen, that's when disciplined traders clean up. The bigger the chaos, the bigger the opportunity.

So yeah, trading involves real risk. But if you study how the best performers actually operate, it's less about luck and more about discipline, adaptability, and keeping your head when others lose theirs. That's what separates the legendary BNF trader from the rest.