By Brett Bull -- Despite the hit that it has taken in recent years, pachinko remains big business for those who find their niche. A stroll around Shinjuku Station will reveal plenty of pachinkov parlors emitting noises of rapidly firing steel balls to the sound of pounding dance tunes. Such clamor is music to the ears of Ei Yoshida, president of G&E Business School—a pachinko academy to learn all there is to know about what is basically an upright pinball game.