On December 8, 2005, Mizuho Securities received a customer order to sell one share of J-Com at 610,000 yen. The quantity and the price were entered incorrectly, and the order went out as 610,000 shares at one yen.
The company lost about 40 billion yen. On December 22, the Financial Services Agency issued a business improvement order. Tsurushima Takuo, the president of the Tokyo Stock Exchange, resigned to take responsibility for the trouble.