Now it’s being reported (via NHK) that he has admitted guilt to these charges. At the time of writing, the punishment for his charges have not been revealed.
Previously it was alleged that he had obtained information of an upcoming Dragon Quest game and news of Final Fantasy VII: The First Soldier. Using this insider information, he purchased shares and sold them for a profit of 20 million yen (roughly 146,000 USD).
Naka would be indicted on charges for violating Japan’s Financial Instruments and Exchange Act with his purchase of shares based on insider information. The first trial had him admitting guilt to these charges under “no doubt”.
Yuji Naka’s last major project was on the critical failure Balan Wonderworld, where he would depart from Square Enix shortly after. Though he did claim they had removed him from the project six months before launch.